Category Archives for "Speaker Review"

Polk Audio DB651 Review

The level of detail in the construction quality on this marine-grade speaker is above average and unmatched by most speakers. Being a component speaker, installation is simple considering it’s got installation gear included as well. The sound quality is also above average from the power handling to the sensitivity and impedance.

No matter how many friends are accompanying you on the road, your road trip can be made much better by having an outstanding set of speakers.

Whereas a quick search on the internet for the best will bring innumerable results, it may disappoint you to find that most of these are actually not as good as they claim to be. Getting the best is not all about going for the most expensive and neither is it about the brand.

Regardless of the low odds of actually getting the best, we were obliged to look for something that will be worth every penny- thePolk Audio DB651

If you’re looking for something that delivers an outstanding sound quality and has just as good a design, then the Polk Audio DB651 is definitely meant for you. In this section, we'll be looking at even the tiniest details on this 2-way car speaker.

Well, how about we get started right away?

Easy installation

Normally, I’d like to start off with the most obvious which in this case is the fact that the Polk Audio DB651 is a 2-way speaker. Most vehicles come with a coaxial speaker system, right? Owing to the fact that this speaker too, does fall into that category, installation won't be a hassle whatsoever.

As a matter of fact, they are the perfect set of speakers as far as DIY installation is concerned whether or not you have done speaker installation in the past. As for the fit, replacing your stock speakers will be quite simple.

Owing to the fact that both the woofer and the tweeters are handled by the same driver, you won’t have to worry about perfectly positioning wither of these.

Yet another thing that guarantees easy installation is the fact that most OEM speakers measure 6-1/2”. Considering the Polk Audio DB651 measures 6-1/2" / 6-3/4", getting a perfect fit won’t be a problem at all.

Other than just being one of the few perfect replacements for your stock installed speakers, there is a multi-hole mounting pattern and a shallow depth magnet design. This saves you quite a lot of time and proves less cumbersome as well.

To make the installation procedure easy for you, you’ll be getting speaker grilles, the installation hardware and the owner’s manual alongside the pair of Polk Audio DB651 speakers.

In a nutshell, as far as installation is concerned, the Polk Audio DB651 has indeed put a lot of time, effort and resources to ensure that you get as much flexibility as possible.

easy to install

A perfect fit for all

Whereas other speakers may get you worried about the fit, this one has you covered. With the Polk Audio DB651, you’ll be getting 6-3/4 adaptor rings which will make it easy for you to fit the speakers in most European vehicles which would hardly be the case for other speakers.

In addition to having the 6-3/4 adaptor rings, the speaker has been constructed with a new multi-hole mounting pattern as well as a shallow magnet design. Each of these features makes the drop in installation amazingly easy.

Top-of-the-line build quality

Upon putting this set of speakers alongside other coaxial speakers in its class, you’ll definitely see that this one will stand out.

A durable rubber surround.

Around the woofer cone is a durable butyl rubber surround. If you’re really after getting a quality bass, then the surround is something you should not take chances on.

Of all the surround materials you’ll get out there, a rubber surround is probably the best you’ll get; let’s find out why, shall we?

First off, if you’re all about getting a quality bass, then you should go for a surround that is as flexible as possible. Considering we’ll be getting rubber surround in our case, you’ll simply be dealing with the best. Rubber allows for optimal movement of the cone and upon doing so delivers the bass from the woofer with utmost clarity and quality.

Something else that makes rubber a preferable choice over the other surround materials is that its level of durability is one of the best. When exposed to extreme temperatures, rubber tends to hold up quite well and more so, it won’t be affected by moisture whatsoever as is the case in surround materials such as foam.

In a nutshell, rubber tends to give you quality sound over the longest period of time.

Silk polymer dome tweeters.

We’ve already had a look at how the surround on the woofer is; now let’s take a look at how the tweeters will hold up, shall we?

Owing to the fact that the tweeters will be handling the high frequencies, it's always best that the surrounding material on these should be as soft as possible. In our case, you'll be getting the silk polymer dome tweeters.

The reason as to why silk is a preferable material to use on tweeters is that it results in the production of higher frequencies smoothly.

Whereas other tweeters may be made out of silk alone, the fact that those on the Polk Audio DB651 are a blend of silk and polymer means that they are quite ideal when it comes to high power handling. With the polymer reinforcement, the dome will be much stiffer and more so, there will be an improved damping.

The end result is that you’ll be able to get a high-volume output and simultaneously maintain a high accuracy level and keep things smooth.

The woofer cone.

We’ve already seen how the high frequencies will hold up now how about we take a look at the low frequencies, shall we?

In order to ensure that you end up with only the best bass quality, you’ll need to go for a woofer cone that’s got the perfect balance between rigidity and lightweight. In the case of the Polk Audio DB651, you’ll be getting a dynamic balance polymer/mica composite woofer.

Polymer alone will work quite well since it’s both rigid and lightweight hence it will have the best sensitivity. Owing to the fact that you’ll be getting a polymer-mica blend on this speaker, the bass quality will be twice as good since the stiffness of the cone will be increased and so will the sensitivity accordingly.

Something else worth taking note of about this cone is that even at high volume, the roll-off will be smooth and the response rate will be quick. In a nutshell, you’ll not have to worry about any distortions whatsoever.

Considering the fact that you’ll be having a rubber surround around the woofer cone, the bass response will be quite outstanding.

A high-temperature voice coil

Yet another feature that makes this speaker worth every penny is that it comes with a high-temperature voice coil.

The coil on the Polk Audio DB651 is a low-mass 2-layer Kapton voice coil. Being one of the things that determines whether or not a speaker is good enough, the voice coil is one of the most sensitive and easy-to-damage parts on a speaker. It is therefore important that the cone be as good enough as possible when it comes to working under high temperatures.

High construction

In the case of our 2-layer Kapton voice coil, you’ll enjoy a cone with a high melting temperature which means that even when supplied with high amounts of power, it won’t succumb to damage that easily. With such a voice coil and a polymer-mica cone, you’ll enjoy a bass like no other.

The frequency response.

Considering this is a coaxial speaker, one of the things that you should really pay close attention to is the frequency response and mostly on the lower end of the scale.

The frequency response in speakers is normally within the range of human hearing and in our case, the lowest possible frequency you can get will be at 35Hz whereas the highest possible frequency will be at 22,000Hz.

With such a frequency response, the highs will be equally as good as the lows, don't you agree? Considering there is a built-in 2-way crossover network included in the Polk Audio DB651, both of these will be isolated to give you a music experience like no other.

Speaking of a 2-way crossover network, let’s have a look at what it’s all about in our next point, shall we?

A high pass and low pass crossover filter

One of the reasons as to why most people do not go for the coaxial speakers is the possibility of the lows and the highs being jumbled up. Taking this into account, Polk audio has included a built-in crossover that separates the low frequencies from the highs.

Though this will not exactly perform as good as it is the case in the component speakers, the sound quality you’ll be getting from your pair of the Polk Audio DB651 will be outstanding. As compared to other speakers in its class, I’d say that this is a definitely worth every penny.

With the low frequencies going to the woofer and the highs going to the tweeters, you'll definitely have a better soundstage.

Swivel mount tweeters.

Besides just including the high pass and low pass crossover on this speaker, there is also a flush and swivel-mount tweeter included on the Polk Audio DB651.

The fact that this is a flush and swivel mount tweeter makes it more customizable. You can be able to point it to your desired direction so that you end up getting a good soundstage.

The best part about this set of speakers is that they come with mounting hardware included as well as a user manual each of which will prove quite handy when working on the tweeters. Well, if you are on a budget and are looking for a quick speaker upgrade for your vehicle, then this might just be what suits you best.

Neodymium magnets

We’ve already seen that the magnets play a huge part in ensuring that the installation of each of the speakers goes as smoothly as possible. Besides this, let’s see how they hold up when it comes to sound production.

Are they really worth it? Let’s find out…

It may surprise you but the fact is that when it comes to speaker magnets, they’re not all the same. Whereas other magnets may just give you an average sound quality, speakers constructed with the neodymium magnets offer much more as far as precision is concerned.

Since this is used in both the tweeters and the woofer, you'll also be getting high-frequency reproduction just as good as the bass. Considering you can pivot the tweeters as per your preference, positioning these speakers perfectly will give you as much musical detail as you desire.

Style and quality all in one.

Now here’s something that you’ll rarely find in most coaxial speakers. Other than just having a rubber surround and durable woofer and tweeter cones, the overall construction will definitely catch your eye.

Polk Audio DB651 stylish

For the sake of durability, all the mounting hardware you’ll be getting is exclusively stainless-steel meaning that it will maintain that shiny look and strength at the same time. As for the grilles, you’ll be getting the ABS type which besides giving them a stylish touch will also protect them from any physical damage.

Something else that’s worth pointing out about the construction of the Polk Audio DB651 is that they are marine certified. This deems them suitable for a wide range of applications other than just using them in your vehicle.

Distortion-free sound

A speaker won’t be any good if you’d have to put up with sound distortions every now and then, would it?

In order to ensure this would not be the case in the Polk Audio DB651, the engineers used laser imaging in the construction. This resulted in coming up with the perfect materials for a distortion-free sound. With distortion being eliminated, you’ll be getting a smooth frequency response with no overlap of the highs and the lows and amazingly sharp detail.

The Klippel optimized components also ensure that you get a consistently clear sound. And as for clarity, the Polk Audio DB651 has got the dynamic balance driver technology to make sure of this.

Power handling.

Yet another thing that we need to take a look at is how good the power handling capabilities of the Polk Audio DB651 are. Let’s start with the RMS.

With each pair of the Polk Audio DB651, you’ll be getting an outstanding 120-watts of RMS. The RMS is simply the continuous power within which the speaker can run without any risk of getting damaged.

With as much as 120 watts for the pair and 60 watts on each individual speaker, you’ll definitely be getting the best sound quality on both the high and the low frequencies.

When it comes to the peak power, each pair working together gives you 360 watts which are quite ideal for the production of a loud bass momentarily.

Though you may be tempted to exceed the RMS as far as continuous power is concerned, you may risk blowing the speakers despite the fact that they have a high-temperature voice coil. You may also end up getting a distorted or lagging sound once in a while once you exceed the RMS hence it’s quite important that you observe this range.

A 4-ohm impedance rating

Yet another thing that should not be overlooked on any well-performing speaker is the impedance rating on the speaker. On each speaker in our pair, the 4-ohm impedance you’ll be getting will definitely be enough.

As far as car speakers are concerned, the lower the impedance is, the better off you are and the greater the RMS power you’ll be able to utilize. With the 4-ohms therefore, you’ll be getting an outstanding bass and owing to the fact that that there is a high-temperature voice coil included, you'll not be at the risk of blowing them

92 dB Sensitivity

Besides the impedance rating, the sensitivity is yet another thing that needs to be paid close attention to. What the sensitivity simply does is to ensure that you get a sound with high volume and utmost clarity and simultaneously optimizes power usage.

With as much as 92 dB which is also above average as far as sensitivity is concerned, you’re guaranteed to get the best sound quality from this pair of speakers.

Conclusion- our final take on the Polk Audio DB651

We’ve already seen what the Polk Audio DB651 is all about and it is now time to wrap things up. The build quality is quite outstanding from the grilles all the way down to the cones. As for the sound quality, I’d say that both the highs and the lows are above average.

If you're looking for the perfect aftermarket set of speakers or just an upgrade, I'd highly recommend these. Though they are not exactly audiophile grade, they’ll give you a kick for your buck.

All in all, though they’re marine-grade speakers, proper maintenance is recommended nonetheless if you want to keep them going for as long as possible.

JBL GTO939 | Car Speakers | Review

One of the most thrilling experiences and probably the best for most is getting to have a car sound system that works just as you desire it to. Truth be told, it won’t be easy at all for you to get such and you’ll have to do a lot of searching to get the best.

To save you both the time and the hassle it would take for you to find the best, we’ve narrowed down your options to only a single coaxial speaker- the JBL GTO939.

If you are looking for a quick upgrade to your current car audio system, then this is definitely the speaker for you. from the installation to the listening experience, the JBL GTO939 will definitely give you a whole new experience.

That being said, how about we delve into taking a look at what this set of coaxial speakers has got in store for us?

JBL GTO939 Premium 6 x 9 Inches Co-Axial Speaker Review

Here are some of the features the JBL GTO939 packs under the hood that’ll definitely blow your mind…

Amazingly easy to set things up.

First off, we can both agree to the fact that one of the most frustrating things when it comes to upgrading the car audio systems can be the installation procedure. The installation package of this car speaker includes a pair of 6 x 9-inch coaxial speakers.

In most cases, the coaxial speakers will perfectly replace the factory installed speakers. If you’re lucky enough, all you may be needed to do is unscrew the mounting bracket of the factory speakers detach the wiring from the stock installed speaker. This should be followed by unmounting the factory installed speaker and replacing it with the JBL GTO939 car speaker. This can be done in a jiffy.

Regarding the installation location you prefer, you may be needed to do much or less work but as we all do know, the easiest way to go would simply be to replace the stock speakers with these ones.

If you want to install these in a new location other than where the stock unit was, you’ll definitely have a lot more to do. Something else that you should have in mind is that regarding the type of vehicle you have, the level of installation complexity you’ll experience will vary. As a matter of fact, you may or may not have to do some extra drilling, filling and a few other modifications to get it to fit. The best casescenario is that it’ll perfectly replace the stock unit even without the mounting brackets which we will look at in a while.


Unlike the coaxial speaker systems that have got the different drivers handled separately, this one has got all the tweeter and the subwoofer being handled by one driver. You’ll be getting a single set with two speakers which should be enough to give you a way better experience that you did get from the factory speakers.

A Dedicated Crossover

Here’s something you won’t get in a full range speaker system every day- a dedicated crossover. Crossovers are normally popular with the component speaker systems and it is one of the advantages they have over most coaxial speakers.

If you want something that’ll give you a kick for your buck, then you should definitely consider getting yourself this pair since each of them comes with a 12dB/octave high-quality crossover component.

This just works in the similar way the crossovers in the component speakers do- directing the high frequencies to the tweeters and the low frequencies to the woofer. If you install the speakers in a perfect location, you’ll definitely create an outstanding soundstage and get the most out of the isolated frequencies.

A piece of advice:

Considering this is a coaxial speaker system with a built-in crossover, it is simply designed to work in the best way possible by the manufacturers. I, therefore, strongly recommend that you don’t consider doing modifications by addition of an external crossover since this will simply interfere with the speaker’s internal wiring system.

The Power Handling.

The power handling capabilities are one of the most important things in a car speaker since it plays quite a big role when it comes to the overall sound quality.

Power Handling

Let’s have a look at how good the JBL GTO939 really is, shall we?

If you know even the tiniest bit of speaker power then you've probably heard of the root mean square. The Root Mean Square is simply the continuous amount of power with which the speakers operate. As a matter of fact, the greater the RMS is, the better off you are.

In our case, the JBL GTO939 has got an outstanding 200 watts of RMS which also makes it one of the best in the market. This simply means that you’ll be getting the best bass since the bass quality is normally determined by how high the RMS power is.

Besides the RMS, there is also the peak power. Whereas the RMS is the continuous power level with which the speakers are run, peak power, on the other hand, is a power level greater than the RMS that the speakers are allowed to achieve for only a few seconds.

The rule of thumb is that the peak power is double the RMS but this not always the case since, for the JBL GTO939, the peak is 300 watts. This, as it turns out is quite ideal when it comes to delivering both outstanding highs and lows.

I greatly advise that for the best experience, especially if you are upgrading your whole car sound system, you, first of all, purchase the speakers. Having done so, go ahead and match these speakers to a suitable head unit. This way, you'll get the most out of the speakers.


You should be keen to observe the RMS range since if you happen to exceed this, you may damage the speaker and have to worry about repairs or worse enough, a replacement. Simply put, as much as you may be having one of the best with you, utmost maintenance is necessary to keep it this way.

If you happen to exceed the RMS threshold for even a few minutes, you’ll be overloading the speaker which could in the end result to sound distortion, lagging or even worse damaging the speaker.

The tweeters- no other better way to enjoy ultimate clarity on the highs

We’ve already seen that for the coaxial speakers, the tweeters and the woofer are handled by the same driver, right? How about we now have a look at each of these individual drivers starting with the tweeters?

Watch The Video for testing sound quality

The tweeters are normally dedicated to handling the high frequencies. in most cases, these frequencies are greater than 2000 Hertz. Whereas all tweeters may be able to produce all the high frequencies that are input to them from the head unit, the quality normally varies which is where the material construction of the tweeters comes in.

The best cone material you can get on a tweeter is normally soft hence when it comes to the production of the clear highs, the sound won’t be too ear piercing.

For our tweeters, you’ll be getting the edge-driven soft dome tweeter design. This allows for the production of high quality and clear highs.

The soft-dome tweeter design increases the power handling threshold of the tweeter and at the same time reduces sound distortion at high frequencies. the edge-driven feature of the tweeters also allows for better dispersion and allow for a lower crossover frequency for better imaging.

Besides the dome on the tweeters, there is also the voice coil. This is oversized which makes it quite convenient when it comes to heat dissipation.

The bigger the surface area the voice coil has the better off are the chances of your tweeters lasting longer since there will ideal heat dissipation. If the voice coil becomes overheated, the odds of it getting damaged are quite high and as far as repairs go, it’s not easy to repair one and you, in most cases may be forced to purchase a new sound system.

Dual-level tweeter volume adjustment-customize your highs.

Other than just having a soft dome backed up with an oversized voice coil, another mind-blowing feature on the JBL GTO939 is the adjustable tweeter volume.

This feature is meant to compensate for the low and the off-axis mounting position or the road noise. You can set the output of the tweeter from 0 to +3 decibels.

The Woofer- look no further for the best bass.

Besides the tweeters, a full range car speaker has got a woofer. The woofer simply determines how good the bass quality is going to be by converting the low frequencies from the head unit to the sound.

Testing  bass

For the best bass quality, you should strive to get a woofer whose cone is rigid and at the same time flexible. This way, you'll not have to worry about the cone coming apart and at the same time, it will have an optimal motion for the production of high-quality sound.

In the JBL GTO939, you’ll be having a carbon-injected plus one cone. As compared to other cones, this one is slightly larger in size. This means that they have a greater range of motion which in turn moves more air. In the long run, you end up with an above-average bass quality.

Vented magnet assemblies.

Keeping the voice coil cool is probably the best way to ensure that you get to enjoy your set of speakers for as long as possible. Normally, besides the speakers heating up from the electricity passing through them, the surrounding environment does contribute to the buildup of heat within them.

To take care of this, JBL included a vented magnet assembly. This helps keep the magnet cool which in turn increases the reliability of the speakers from greater power handling. At the same time, this eliminates power compression which could distort the speakers sound.

A carbon-composite nonmagnetic frame

Here’s something you’ll not be getting every day- a carbon composite non-magnetic frame. This is used in the JBL GTO939 so as to resist warping even when the speakers are mounted on an uneven surface. 

JBL GTO939 Premium 6 x 9 Inches Co-Axial Speaker

This is unlike anything you’ll find in most speakers as the non-magnetic carbon composite aids in controlling the magnet’s energy and deliver it to the voice coil instead of wasting it as heat.

To make things even more interesting, the plastic does not resonate hence contributing highly to the high levels of accurate sound you’ll be enjoying

The sensitivity.

Besides the power handling, something else that determines the quality of sound you get from your speakers is their sensitivity.

For the JBL GTO939, you get an outstanding 94 decibels of sensitivity.

Something you need to know about sensitivity is that it works hand in hand with the power capabilities of a car speaker. Normally, the higher the sensitivity, the better off you are. Higher sensitivity levels allow you to play your music at higher volumes at an outstanding quality and simultaneously use lower amounts of power.

The average amount of sensitivity for a coaxial speaker is around 88dB. If you’re lucky enough to get anything above this as is the case for the JBL GTO939, then you should definitely settle for those speakers.

Mounting brackets.

Along with the pair of JBL speakers, you’ll be getting mounting brackets for each of these. This simply allows you to have the speakers fit in place and at the same time the mounting brackets protect the speakers from any physical damage.

The mounting brackets that come with the JBL GTO939 will prove quite useful but on the downside, they may not fit in place of the stock speaker installation location. In such a case, you’ll need to drill the screw holes yourself to have them fit perfectly.

True 4-ohm impedance.

The impedance rating on a car speaker normally has a great impact on the power handling of the speaker. Think of the impedance and power as being inversely proportional.

The greater the impedance, the lower the amount of electricity it allows to flow through to the speakers but the lower the impedance the higher the amount of electricity it allows to flow through from the head unit to the car speakers

With 4 ohms on the impedance of our speakers, you'll be getting quite an outstanding performance considering it has got an RMS of 200W. this level of impedance makes use of every watt that comes from your head unit and also compensates for the substandard speaker wiring you may get in most cars.

Simply put, at the end of the day the 4-ohm impedance is a great boost to the overall sound of your vehicle’s audio system.

Outstanding frequency response

Finally, let’s take a look at how the frequency response on the JBL GTO939 really is. First off, you should know that the frequency response is the range of frequency that is audible to the human ear and this just is anything between 20Hz to 20kHz. Even so, it’s quite seldom to get a coaxial speaker that’ll observe this.

Too low a frequency for the bass is rarely used in music and most coaxial speakers will only function at 80Hz and above. For our JBL speakers, the frequency response is between 46Hz and 21kHz. This is enough to be able to handle both the highs and the lows in all music genres conveniently.


  • check
    Vented magnetic assemblies to aid in keeping the voice coil as cool as possible.
  • check
    High sensitivity of 94 decibels to provide an outstanding sound without overdriving the audio system
  • check
    Dual level tweeter adjustment to help suit your listening preferences.
  • check
    Larger carbon-injected plus one cone that move more air for an above-average bass.


  • Despite the sound quality being quite outstanding, installing the grilles may be quite difficult since there might be some extra drilling to do to get them to fit

Frequently asked questions

Q: does the bass hold up at a high volume?

A: yes, though if you want a really good bass you should consider getting subwoofers.

Q: what is the RMS rating on these speakers?

A: this is 200W continuous power and 300 watts for the peak

Q: what is the ohm rating on the speakers?

A: 4 ohms

Final Verdict

Coming to the end of the JBL GTO939 Premium 6 x 9 Inches Co-Axial speaker review, we can both agree that there’s a lot you’ll be getting from this pair of speakers. From the construction design to the power handling, it will definitely be worth every dime.

Just like the other components in your audio system, proper maintenance precautions are needed for these speakers. Don't, for instance, exceed the power handling capabilities.

As far as setting it up is concerned, the user manual comes along with the package and so does a pair of grilles each for the two individual speakers. In overall, you should definitely try it out if you’re looking for an upgrade; all the best!

JBL GTO638 | 6.5-Inch 3-Way Speakers| Review

Whether you are hitting the road on your own or have got someone by your side, you can definitely agree to the fact that music is the best companion you could have. What if I told you I had just the perfect speaker replacement for your factory installed unit?

Well, I know this may sound somehow too good to be true but it actually is; today, we’ll be taking a look at the JBL GTO638 6.5-Inch 3-Way Speakers.

Before we move on to take a look at what makes this set of components as good as it is, you should know that when it comes to car speakers, there’s quite a lot to consider. It’s all about narrowing down your options to getting something that’ll be able to offer you exactly what you want.

That being said, how about we move on to the main agenda? Let’s get started with our review, shall we?

JBL GTO638- 2018’s best recommended coaxial speakers

Moving on to the main agenda, it’s time to take a look at the in-depth review of the

The Woofer- definitely the Best bass

The woofer and the tweeters are basically what we should expect from a full-range car speaker whether it’s a two-way or a 3-way car speaker, it just has to have these two.

For our JBL GTO638, you’ll be getting a 3-way speaker in your vehicle which simply means that the performance will be above average but for now, let’s take a look at the woofer alone, shall we?

listen The Quality Sound

Another One!

You’ll be getting the Patented Plus One woofer cone. This type of cone is quite popular with the JBL component speakers and truth be told, it will give you a kick for your buck. The Plus One woofer cone has got a greater surface area as compared to the other woofer cones and in addition to this, it’s constructed from propylene. As a matter of fact, as compared to most of the other speakers, the plus one woofer cone is about 30% larger in size

In a nutshell, the larger the surface area on a woofer cone means that it is going to move more air which in turn leads to the delivery of a better bass as far as clarity and accuracy are concerned.

As for the polypropylene, you should know that the best speaker cones for the best bass are normally constructed from the rigid and flexible material. This is usually done to increase the sensitivity of the speakers and at the same time don’t compromise on the quality. The high sensitivity and outstanding rigidity ensure that you get an outstanding bass in overall.

Besides the woofer cone, something else that greatly influences the bass quality is the type of surround you have on your woofer which takes us to the next point.

Edge-Driven, Mylar-Titanium Super Tweeter

Whereas some music genres lean more towards the bass, some lean more towards the tweeters. Considering that your taste in music is entirely a personal opinion, JBL strives to ensure that the tweeters are just as good in playing their role as are the woofers.

That being said, let’s have a look at what theJBL GTO638 have for us…

Right out of the box, you’ll be getting a pair of the JBL GTO638 speakers. Each of these speakers is a 3-way and included in the design is an Edge-Driven, Mylar-Titanium Super Tweeter.

Unlike the normal tweeters you are used to, these tweeters will be quite the upgrade; first, they come with a large voice coil similar to what you will get in home audio systems. The benefit of having a Mylar and titanium blend is that you get both lightweight and strength all in one.

Besides just being light and strong, the larger the voice coil is the greater the surface area and the better the heat dissipation capabilities it’s got. With this, the voice coil is able to increase power handling on the super tweeters and simultaneously reduce distortion at high output levels.

The design on these tweeters is also meant to create a more seamless integration with the woofer and more so, it is adjustable. You can, therefore, modify them so as to optimize the sound and get crystal-clear and extended high frequencies.

Edge-driven Mylar titanium tweeter

Whereas the super tweeter functions to handle the extremely high frequencies, the edge-driven Mylar titanium tweeter on the JBL GTO638 simply handles the high frequencies.

Here’s what makes it a choice worth your money…

With the addition of this driver in the component JBL speaker, rich sound is delivered via the midrange frequencies which, as we all know is where most vocals in the music are found.

With the addition of extra detail in the mid-range coupled up with the super tweeter’s high frequencies and the low frequencies of the woofer, this qualifies as an audiophile's number one speaker. As a matter of fact, it indeed is worthy of being used for home entertainment as well

The addition of a built-in crossover network.

Well, here’s something you don’t see every day- a built in crossover in a coaxial speaker system. One of the main reasons as to why people do not settle for the coaxial speakers as a suitable upgrade to the factory installed units is the frequency overlap in the drivers.

Whereas some speakers incorporate bass blockers so as to prevent the bass from going to the tweeter, this one does so much more.

By incorporating the use of a built-in crossover network that has got advanced high and low pass filters, the JBL GTO638 is able to create a smooth transition between the woofer and the tweeters. The end result of this effect is mid-range vocals that are so natural you can hardly tell them apart from the original sound.

Rubber surround- get the best flexibility.

Having an outstanding woofer cone with a poor-quality surround would mean that the cone will not be able to reach its full potential.

JBL GTO638 speaker

In the JBL GTO638, the surround is made of rubber. As compared to most of the other surround materials, a rubber surround might just be the perfect choice if you want the biggest kick for your buck. This does not restrict the cone movement in any way and by doing so, the cone moves freely and achieves its optimal potential.

Something else that makes rubber far much better than most other surround materials is that it’s quite durable. Considering that the speakers tend to be heated up at times which may lead to the bass being flawed, rubber tends to take care of this since it is not affected by extreme temperatures. Besides just extreme temperatures, rubber is also not affected by moisture.

Outstanding durability- listen loud at all times.

We can both agree on the fact that the last thing you'll want to worry about is the quality of your speakers. When it comes down to this, you should know that each JBL speaker released in the market is passed through as much as 500 hours of environmental testing inclusive of which is the JBL GTO638.

This set of component car speakers is exposed to temperatures fluctuating between -35 degrees Celsius and +90 degrees Celsius and; more so, there is as much as 90% humidity exposure for more than 200 hours.

The speakers are also exposed to UV light for more than 150 hours so as to stimulate the mounting location on the vehicle’s deck. to see to it that you’ll only be getting the best from these speakers, they are passed through vibration testing possibly to simulate their operation in a moving vehicle.

In a nutshell, JBL has put a lot of time and resources into this set of coaxial car speakers to ensure that they won’t disappoint you- this should be enough reason to put your money on the JBL GTO638.

Easy installation.

Even for someone who’s done a speaker installation in the past, they can agree that it’s not an easy task since every vehicle is different and so is the physical construction of the speakers.

Watch The Unboxing JBL GT0638 speakers

What if I told you that you could actually do the installation of the JBL GTO638 on your own? I know, this sounds too good to true but here’s what makes this car speaker one of the best and user-friendly speakers in the market.

Since most OEM speakers measure 6 ½ inches, this car speaker does have this measurement as well. If your vehicle happens to have a 6 ½ installation location, you can easily be able to replace your stock speakers without the use of any special tools. You’ll also not have to worry about making any modifications.

Right out of the box, you’ll get quite some installation gear that’ll definitely make things easy for you. included with the speakers are mounting brackets and grilles as well as a buffer for the bracket/grille. You’ll also be getting 16 screws to make the installation easier.


To make the installation much easier, the JBL GTO638 employ the use of the patented intermount III mounting system. Normally, depending on the type of vehicle you have, the common factory built 6 ½ inch location can vary in size to about 6 ¾ inches. To take care of this slight variation, this set of speakers come with installation rings included. This makes replacing even an older set of aftermarket speakers quite easy.

Something to have in mind…

Even though you can install the speaker in a number of places, the doors seem to give the best results in creating a good soundstage. When installing them on your doors, ensure that the window is not obstructed in any way since the magnet is quite large. Most preferably, you should probably take your measurements to the last centimeter so as not to damage the speakers or any mechanisms in the door.

True 4-ohm Topology

The impedance rating is one of the important features in speaker operation. Before we move on to looking at what the JBL GTO638 have in store for us, let’s take a look at what impedance really does.

Speaker impedance normally determines how much power will be able to reach the speakers from the radio head unit. Normally, the lower the impedance rating the greater the amount of power gets to the speakers. Simply put, low impedance voice coils are able to extract more power from your amp or head unit as compared to the high impedance coils.

In the JBL GTO638, the impedance coil used is lower than the 4-ohm coil which is considered as being of outstanding performance, now, think of how much you’ll get from the 2-ohms in these speakers.

The reason the 2-oh load is better is that the speakers will be able to extract as much power as possible from amps that are designed to drive loads that are 4 ohms or less.

Most factory-installed sound systems include 2-ohm speakers and amps made to drive the 2-ohm loads.Replacing them with anything more than this reduces the amps output power. Taking this into account, getting this set of JBL speakers ensures that you get the most powerful performance from the speakers.

Power Handling

For the best sound quality, it’s important that the speaker’s power handling capabilities be as good as possible. When it comes to power handling, you’ll need to pay attention to the RMS. This is basically the continuous wattage that the speaker runs on without getting damaged.

For our set of JBL GTO638, the RMS is 60 watts. This may not seem like a lot but considering the impedance rating on the set of speakers, you’ll definitely have your mind blown. The speakers will be able to extract as much power as possible which means that the bass will not be compromised and the same goes for the mid and the high frequencies.

As for the peak, the rule of thumb in most cases is that this is double the amount of RMS but it doesn’t necessarily have to be the case which is why you’ll get 180 watts for these car speakers.

The peak, unlike the RMS, pushes the speakers beyond its limits. You, however, should not substitute the peak for the RMS since if the speakers operate beyond the peak for too long, you could end up with a distorted sound.

This may need you to go spend on the repair or even worse, you may be needed to make a full replacement of your speakers which can be quite frustrating.

Sensitivity- louder & Better

The power and impedance are not enough to give you an outstanding sound which is why you’ve got the impedance rating.

JBL GTO638 Sensitivity- louder & Better

The impedance and the power handling normally work hand in hand in the sense that the higher the impedance is, the better and louder sound you’ll get. The benefit of having the high impedance on a speaker is that with the high sensitivity, the speaker gets to produce louder and clearer sound while at the same time making use of the least amount of power.

The recommended rating is normally 88dB but in our case, you get an outstanding 94 decibels. This sees to it that the sound is loud without any lags, distortions or being too ear piercing.

Coupled up with the impedance and power handling, you'll also be able to make use of as much power as possible. This, in the long run, gets you the most from this 3-way coaxial speaker system- it's definitely going to give you a bang for your money.


  • check
    Built-in crossover network to isolate the high frequencies from the lows to give a lifelike experience.
  • check
    The plus one woofer cone has a greater surface area for a better bass response.
  • check
    With the rubber surround, you get both durability and utmost flexibility from the woofer.
  • check
    Comes with mounting brackets, grilles, and screws to make installation easier.


  • you may have to do some modifications on the fit just in case it’s a hassle to have them in place.

Frequently asked questions (FAQs)

Q: what is the mounting depth of the speakers?

A: this is 2 1/16 inches

Q: what is the impedance of the speakers

A: the rating is 2 ohms as indicated in the package

Q: how's the bass in this pair?

A: the bass is good; you can always add a subwoofer if you want more

Final Verdict

As far as quality is concerned, the JBL GTO638 car speakers are definitely worth every penny. From the construction design to the installation procedure and the performance, this pair might just be the perfect upgrade to your stock installed speakers.

For an even better performance, I recommend that you consider doing an all-around upgrade on your sound system when you decide to get this pair. This way, you can then match the speaker to a head unit that'll ensure the full potential of this set is achieved.

Proper maintenance is also important. Be sure to observe the RMS threshold. At the same time, you should make sure the mounting location does not compromise the safety or performance of the speakers.

Pioneer TS-A6995R | Side by side comparison | Car Speaker Review

Normally, upon purchasing a new vehicle, you’ll get the factory installed car speakers but will these really give you the music experience you crave?

If you’ve ever thought of bringing some serious audio power to your vehicle, then you should definitely consider the Pioneer TS-A6995R. This coaxial speaker will definitely give you a kick for your buck which makes it probably the best replacement for your stock installed speakers.

Today, we’ll be taking a closer look at what this speaker packs under the hood. So just sit back and relax because I’m about to bring in the noise.

Let’s get started with our review, shall we?

Here’s what makes Pioneer TS-A6995R is the best

Easy installation.

One of the most annoying things when it comes to the installation of new speakers in your vehicles is the difficulty you may face. As a matter of face, though most people only assume that this is the case when setting up component speaker systems, the same goes for the coaxial too.

In the case of the Pioneer TS-A6995R, you’ll be doing a replacement of the stock speakers. This means that you’ll have to take out the speaker in your doors and in their place, have the new Pioneer TS-A6995R 5-way speakers.

The best thing about having coaxial speaker replacement is that you can install them on either your front or rear car doors regarding whichever set up you are comfortable with.

As much as making a replacement for your stock speaker might be easy, it is recommended that you, first of all, be sure of the dimensions. These speakers measure 14 x 6 x 11 inches. This should be able to fit in most vehicles. Just to be safe, however, you should probably take out your stock speakers and measure them first before buying the Pioneer TS-A6995R.

Elastic speaker polymer surround.

How good the bass quality is normally determined by the nature of the surround.The more elastic the speaker surround is the better the bass quality is. In this case, you’ll be getting an elastic polymer speaker surround.

Pioneer TS-A6995R testing

As far as flexibility is concerned, this one just so happens to be one of the best since besides just being a flexible polymer, it is also lightweight. As a result, the surround is able to move the cone freely back and forth which in turn results in the production of quality bass.

The elastic polymer also does have a high sensitivity which means that even the slightest sounds will be registered thus giving you acute accuracy and clarity of all your music.

Another benefit you get from having an elastic polymer surround is its uniqueness of having shape retaining properties. Unlike most of the surround materials, you'll get on other coaxial speakers, the polymer will not sag no matter how long you use it.

It also handles high temperatures quite well- something else that makes it worth every penny.

Outstanding power handling capabilities.

Besides just the construction design, power handling is also quite important when it comes down to choosing coaxial speakers.

If you want a decent bass on all your music genres, then you should only focus on getting something that has an outstanding power handling capability. In the case of the Pioneer TS-A6965R, the nominal power or rather the RMS is an outstanding 80 watts.

The RMS is the amount of constant power with which the speaker is run without the speaker getting damaged in any way. As long as you observe the RMS power handling capabilities of the Pioneer TS-A6965R, you won’t be experiencing any sound distortions or lags in your music. On this speaker, you’ll be getting 200W of RMS per pair and 100W for each individual speaker.

The peak power of the speaker is an outstanding 600 watts on each of the pair and 300W on each of the speakers. This is normally a threshold above the RMS that the speakers are allowed to exceed a few seconds.

When it comes to the power handling capabilities, you need to observe the power handling of the head unit. For the best performance, especially when you are doing an overall upgrade of your speaker system, you should, first of all, get the speakers and then get a head unit that'll match up to the speakers’ performance.

The sensitivity.

A speaker’s sensitivity is what determines how loud the speaker is going to sound in relation to the amount of power that’s provided to it. An easy definition of sensitivity is the ability of a speaker to convert the power provided to it to sound.

Speaker sensitivity and power rating work hand in hand in the sense that the higher the sensitivity is, the less power you’ll need in order for you to get to play your music at high volume.

In our case, we’ll be having a sensitivity of 92dB which happens to be higher than the recommended sensitivity measurement of 88 dB. With as much as 92dB of sensitivity, you won’t be needing too much power to get an outstanding sound output from these.


Even though sensitivity tends to compromise the woofer on some areas, it’s not the case in the Pioneer TS-A6965R.

For instance, the manufacturers may need to lighten the woofer cone to some degree so as to improve sensitivity. Upon doing so, you may have to put up with sound distortions momentarily. To take care of this, the TS-A6965R has got the multilayer mica matrix cone that despite being light is quite rigid hence giving you acute accuracy.

Speaking of the multilayer mica matrix cone, let’s take a closer look at it on our next point, shall we?

Multilayer mica matrix cone

As much as the surround is quite essential for the production of quality bass, the cone material is one of the greatest determinants of a quality bass. Let’s have a look at how good this speakers cone is, shall we?

For optimum sound production from the cone, you’ll need to have material that’s both rigid and at the same time light. As a matter of fact, as compared to other outstanding materials that you’ll get on other cones such as polypropylene, multilayer matrix is 30% lighter.

In addition to being lighter, it’s sensitivity is second to none and the same goes for accuracy and clarity which is far much better than most of the speakers in its class.

Also, despite the fact that the cone is light, it is able to handle high power levels that would otherwise damage the cone. The multilayer matrix is also high-density in structure and cuts down the flexing in order to produce a richer mid-bass response.

Whereas the surface of the multilayer mica matrix cone is able to maintain the superior rigidity and internal loss of the cone, the back, on the other hand, utilizes the light and water-resistant material.

Heat-resistant voice coil

The voice coil is one of the most delicate components of a coaxial speaker system. That being said, it is important to also point out the fact that we also overlook its significance when purchasing our speakers. For the Pioneer TS-A6965R, be getting probably one of the best.

let’s see what it’s got in store for us, shall we?

One of the major problems which are also what leads to the damage of most speakers is the coil's heat dissipation. With high amounts of power being supplied to the speakers, the coil, on the other hand, will need to be able to get rid of the excess heat as much as possible.

In our Pioneer TS-A6995R speakers, you’ll be getting an RMS power rating of 100W and a peak of 300W for each of the speakers. With such an amount of power, you should definitely expect an outstanding bass and if you really love a booming bass, then the voice coil is going to get quite hot.

Whereas some coils are blackened so as to increase the rate of heat dissipation, this one is a high-temperature voice coil. This is a heat-resistant voice coil wire that ensures there is utmost heat dissipation and at the same time adds to the durability of the coil. This is able to withstand the high-power input which in turn allows you to get the kind of bass you like.


If you want your heat voice coil to last longer, then you should observe the power rating of the speakers. Repairing the coils can be a hassle and it's not always a guarantee that the speaker will perform as good as it did.

Voice coils on a speaker are what causes the cone to move hence producing the sound from the speakers and it is best that you try your best to keep them in their original state. Think of it as the key element of the speaker.

The impedance.

Besides the power rating of a coaxial speaker, the impedance rating is one more thing that determines how good a sound you’ll be getting.

For the Pioneer TS-A6965R, you’ll be getting 4 ohms.

Normally, the rule of thumb is that there needs to be a correlation between the impedance rating and the power handling capabilities of a coaxial speaker. Simply explained, speaker impedance is the resistance that any speaker is able to give to the current and voltage that’s being applied to it. As a matter of fact, it is referred to as speaker resistance in by some experts.

Any speaker that’s rated 4-ohms on the impedance is basically considered as being a high-end speaker. This, in turn, needs a lot of power in order to produce a decent sound which is where the 100W RMS comes in.

New grille design

It is always important that you keep your speakers safe from any physical damage, right? Well, one of the ways you can do this is by including a nice fitting grille to them.

In most cases, the aftermarket speakers you purchase will not come with the speaker grilles and sadly, you have to look for these on your own. This can be quite a hassle and it’s not always the case that you’ll be getting perfectly fitting grilles.

For thePioneer TS-A6965R, you’ll be having a new grille design right out of the box. The grille is designed to protect the tweeters and the mid-range assembly but not the whole speaker. It is really important that you be careful when you’re around the speakers not to damage them in any way.

The top and bottom of the grille cover are open leaving the rest of it vulnerable to potential damages. As for setting things up, you'll just need to have the screws in place and you're good to go, it'll fit in place quite perfectly.

Based on the installation location of your factory installed speakers, you may be needed to increase the size of the installation opening when replacing your stock installed speakers with this one.

The tweeters and the midrange.

Normally, a coaxial speaker is composed of just the woofer and a pair of tweeters. Besides this, however, there are other variants. These normally have the midrange driver that complements the woofer and the tweeters.

In the case of the Pioneer TS-A6995R, you’ll not be getting a 2-way, a 3-way or a 4-way, you’ll be getting a 5-way 6” x 9” coaxial speaker. The tweeters simply take care of the high frequencies, the mid-range driver handles the frequency range that’s neither too low nor too high (about 250 to 2000 Hz).

The soft dome midrange/tweeter driver makes use of a waveguide enclosure. This design is able to have both the mid and high frequencies projected in a wide and uniform dispersion pattern. The end result of this dispersion is that you get to have a smooth on and off axis response.

Within the diaphragm is a fiber that is optimized to balance both rigidity and lightness. This way, it is able to achieve outstanding sound propagation with high sensitivity, speed as well as responsiveness. The magnet on the Pioneer TS-A6995R enhances drivability of the diaphragm so that the sound is reproduced with outstanding power.

The frequency response.

Simply explained, the frequency response is the frequency range within normal human hearing within which a speaker is able to play music.

As a normal rule of thumb, this is between 20Hz and 20 kHz. In the case of these pioneer speakers, you’ll be able to play any music notes that lie between 27Hz and 37kHz quite comfortably. This allows you to enjoy music from the tweeters, the midrange driver and the woofer equally as good.

Normally, a coaxial speaker will not play much below a frequency of 80Hz.You should, therefore, consider getting a subwoofer to compliment this pair of coaxial speakers if you'd like to have an outstanding sound quality.

The tweeters are exclusively dedicated to the high frequencies i.e. above 2000 Hertz. The mid range driver, on the other hand, will handle about 300 to 5000 hertz whereas the woofer can handle the low frequencies.

Other than just having the tweeter, the midrange, and the woofer, there is also the super tweeter included. Similar to the way having a subwoofer in your system is going to boost the low frequencies, a super tweeter will greatly boost the performance of the mid-band and the treble as well.

The super tweeters will be able to produce frequencies that a normal tweeter cannot be able to produce even as low as 6Hz. This way you’ll get a higher resolution in overall in your music. You may actually be surprised by the high detail you’ll be getting on the bass.

Also, regarding the quality construction of all the drivers on this coaxial speaker, you’ll definitely see the value of every dime you spend on it put to use.


  • check
    Lightweight elastic polymer surround for the best sensitivity.
  • check
    The voice coil is heat resistant for optimal heat dissipation and high durability to withstand high input power.
  • check
    Utilizes a waveguide enclosure for projecting the mid and high frequencies in a uniform pattern for a smooth on and off axis response.
  • check
    Multilayer mica matrix cone for ultimate rigidity and durability for the production of outstanding sound qualities.


  • The covers do not cover the speakers fully which leaves some sections of it vulnerable to damage

Final verdict.

It's now time to wrap things up and all I can say that the Pioneer TS-A6995R is one of the few component speakers that'll offer you an above average performance. Simultaneously, this pair of speakers will be a bargain for your money.

With the outstanding power handling, the fact that it’s a 5-way coaxial speaker and state-of-the-art quality construction and design enough qualifies it as a high-end speaker.

Just like you would do when making any upgrades to your vehicle’s sound system, it is important that you be keen on the dimensions. You may be needed to expand the stock installation location a little bit. Also, since the grille doesn’t cover the whole front-facing end of the speaker, be careful not to damage it.

Weighing the good against the bad, this is definitely worth spending your cash on.