JBL GTO629 Premium 6.5 Inch Co-Axial Speaker Review 2021

Car speakers play an essential role in ensuring that you have a fun drive in your vehicle always. If they produce poor sound quality, you might hate driving in your car. Fortunately, upgrading your speakers is one way of bettering your car’s sound system. If you want to upgrade your current speakers, the JBL GTO629 speakers could be ideal for you.

JBL is a well-known brand that produces premium co-axial speakers and other products like headphones. Regularly this company designs new models to suit those who’re in search of high-quality sound. Many people recommend JBL series speakers as a perfect upgrade for those who wish to upgrade their speakers. Thanks to the carbon material used, these speakers play music accurately not missing any beats. So, should you invest in JBL GTO629 Premium 6.5 Inch Co-axial speaker? We’ve written this JBL GTO629 review to help you make an informed decision.

This speaker functions at 4 ohms once powered thanks to the three ohms voice coils. As such, it utilizes all power generated by the 4-ohm stable amplifier or your head unit. It also comes with a vented magnet that has a voice coil that’s thermal capable which distributes heat evenly ensuring the durability of your speakers.

Additionally, the speaker’s cones produce higher sounds using the same power. Not to mention it has high-frequency responses that’ll produce better sound to leave you dancing or nodding your head as your favorite songs play. Quality and durability are what the GTO series speaker from JBL offer. Plus, they incorporate the latest technologies that meet your needs.

Features of JBL GTO629

This speaker is a traditional type of coaxial speaker (two way mid- tweet) that uses a 1-inch dome textile made tweeter and a 6-inch mid-range. It uses 180 watts at its peaks and 60 watts power when running continuously. Adaptor rings are mounted using steel mounting technology which means one can mount them in several holes of between 6-6.75 inches.

BL GTO629 Premium 6.5-Inch Co-Axial Speaker

One can mount a minimum of approximately two inches. Therefore, this speaker will likely fit almost all doors. Also, those who prefer mounting their speakers on top of their door, they’ll be glad to know that this product comes with a pair of grilles and all the hardware required for mounting. But, the speaker wire isn’t included in the package. That said let’s take a look at JBL GTO629 specs.


  • A dedicated 12B/octave
  • High-temperature voice coil
  • 3 ohms impedance
  • 93dB sensitivity
  • 2inches top mount depth
  • High-quality crossover components to direct lows and highs musical notes to the appropriate speakers
  • Patented UniPivot Tweeter that lets one aim sound at their ears even when their speakers are mounted down low in the doors
  • Low-impedance that replaces undersized wires found in many cars

Why We Love This Model


Rated 25- 180 Watts Power Range

What we mostly love about this speaker is the sharp, clear sound it produces. As it delivers up to 180 watts of power, it is perfect for systems that are powered with factory amplifier power levels or head-unit.

Furthermore, this model perfectly fits other GTO Series amplifier combinations. Therefore, it still can deliver even with systems that have one or more subwoofers. Also, it has features excellent specifications on power-handling thus increasing the longevity and reliability of the speaker.

Vented Magnet Assemblies 

These vented magnetics cool the voice coil. As such, it eliminates power compression that can damage the sound produced by this speaker while increasing reliability even when power handling is high. We also love the extra adapter rings included that enable this speaker to fit in various models of factory speaker openings of this size. Additionally, you’ll appreciate the mesh grilles this speaker comes with that offer protection when mounted on grille requiring locations.

Cone Technology      

Another great thing about this model is that it features a plus one cone that’s carbon-injected. This ensures excellent speaker cone area compared to other similar cones. Since there’s an increase in cone area, it increases the amount of air the speaker radiates. Additionally, as its material is carbon-injected it ensures stiffer as well as lighter cone as such it improves the frequency response which ensures a better production of musical notes associated mostly with large speakers.

Again, it has a carbon composite non-magnetic frame which ensures durability. These frames will still remain precise even in demanding conditions.

High-Frequency Response and High Sensitivity

This model features a wide frequency response that goes over 20kHz. This, in turn, caters to variations in speaker positioning in your car and also for human deficiencies, if any, on frequency spectrum that’s above 15kHz. Since this speaker provides a full-range frequency response, this ensures better sound quality.

Additionally, it features a high sensitivity of 93dB which allows delivering of high-quality sound without overwhelming your audio system. This 93 decibels sensitivity at 2.83 voltages per 1 meter, allows the speakers to produce greater sounds and volume using watts as little as 5W. Therefore, one is assured of better performance of this speaker using moderate power. Now, its excellent performance makes it a suitable upgrade for factory speakers or aftermarket ones.

What Speaker Openings Does the JBL GTO629 Speaker Fit?

It is marketed as 6-1/2 inches meaning it can fit standard speaker openings that measure 6-1/2. But, if you don’t use an adapter bracket or you don’t drill new screw holes, this unit can fit standard speaker openings of 6-3/4. The metal brackets provided attach this speaker to 6-1/2 three-hole as well as non-symmetric four-hole patterns on Ford. No brackets are needed if one drills new holes.

What We Like:

  • High-quality speaker that’s durable for many years
  • Better performance due to the carbon injected plus one cones
  • Speaker produces more bass considering its sound quality
  • 1-year warranty
  • Affordable price

What Could Be Better:

  • Designed to fit specific car models. It’s therefore essential that you check your car size first otherwise you might need the product to be replaced.

Final Thoughts

JBL is a trusted company that produces high-quality speakers of good sounding. And this JBL GTO629 maintains the company reputations. It is a well-made and designed speaker that offers better performance without denting your pocket. If you’re still in doubt, go check it out at a JBL retailer in your location and try it for yourself.

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