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GT7 Series 6-3/4" component speaker system

17 Reviews | 4 questions - 8 answers

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Item # 109JBLG76C

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Installation gear for most cars

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Our take on the JBL GT7-6C

These GT7-6C component speakers from JBL have everything you want when shopping for a car speaker: an advanced design, quality materials, a cool look, and a practical price tag. But in the end, it's what they sound like that matters most, and true to their iconic heritage, these JBLs deliver.


A cool upgrade

These GT7-6C component speakers from JBL have everything you want when shopping for a car speaker: an advanced design, quality materials, a cool look, and a practical price tag. But in the end, it's what they sound like that matters most, and true to their iconic heritage, these JBLs deliver.

How do they do it?

You'll gain a satisfying boost in sound quality from this component system, thanks to JBL's patented Plus One™ architecture, which expands the surface area of the 6-3/4" polypropylene woofer for impressive bass. And the edge-driven dome tweeters handle a wider range in the high frequencies for more natural sound — vocals, in particular, benefit from a smoother transition from the midrange. The external crossovers direct the right frequencies to the each driver to ensure a balanced sound.

JBL built these GT7 speakers to handle up to 50 watts RMS, so they'll perform spectacularly with an aftermarket radio or amp, but with a design geared toward maximum efficiency, you'll get superior performance even from a factory radio. Grilles are included for a custom installation.

Installation note: You'll need a pair of our universal backstraps to install the tweeters in the factory locations.

Fantastic east to install in my Honda CRV crystal clear highs and mid range with it turned way up,

dominic, Wakefield, MA

What's in the Box:

  • 2 Woofers
  • 2 Tweeters (each with 6" wire attached)
  • 2 Crossovers
  • 2 Woofer grilles
  • 2 Surface mount tweeter housings
  • 2 Angled surface mount tweeter housings
  • Eight 1-1/8" Self-tapping Allen head screws
  • 3mm Allen head bit
  • 8 Speed clips
  • Four 1" Pan head self-tapping screws
  • Four 5/8" Flat head self-tapping screws
  • Four 3/8" Flat head self-tapping screws
  • Instruction manual


  • component speaker system includes 2 woofers, 2 tweeters, and 2 external crossovers
  • 6-3/4" polypropylene Plus One™ woofer cone with foam surround
  • 1-13/16" edge-driven dome PEI tweeter
  • power range: 2-50 watts RMS (150 watts peak power)
  • frequency response: 50-20,000 Hz
  • sensitivity: 92 dB
  • woofer top-mount depth: 2-3/8"
  • grilles included
  • warranty: 1 year
  • Our 60-day money-back guarantee

JBL GT7-6C Reviews

Average Customer Review(s):

(17 Reviews)
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Hands-on research

Features and Specs

Speaker Size 6 3/4
Design 2-way
Tweeter Design Edge-Driven Dome
Tweeter Composition PEI
Woofer Composition Polypropylene
Woofer Surround Foam
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 92
Frequency Response 50 - 20k Hz
Minimum RMS Wattage 2
Maximum RMS Wattage 50
Peak Power Handling (Watts) 150
Impedance (Ohms) 4
Top-mount Depth (Inches) 2 3/8
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 5 11/16

Product Research



Plus One Woofer Cones: The Plus One woofer cones offer more surface area than other speakers that fit in the same size opening. This is accomplished by using a new basket design and hi-roll surround. The result is greater bass output and an increase in efficiency.

Size Classification: Some manufacturers, including JBL, call this size speaker a 6-1/2". Because it requires a larger cutout than a standard 6-1/2" speaker, Crutchfield has traditionally referred to this size woofer as a 6-3/4". Please refer to the Crutchfield Vehicle Selector to confirm fit in your vehicle.


Tweeters: The edge-driven dome tweeters are made of PEI (Poly-Ether-Imide). PEI is a polymer film, capable of producing a wide soundstage.

Tweeter Mounting Options: Using the supplied housings the tweeters can be surface mounted flat or surface mounted at an angle (no flush mount housing is included). Once mounted in the appropriate housing, the tweeters have these dimensions:

  Surface Mount Angled Surface Mount
Mounting Depth screw depth screw depth
Mounting Height 0.884" 1.844"
Cutout Diameter N/A N/A
Frame Diameter 1.8" 1.8" x 2.21"


Connections: The passive crossovers feature screw terminal inputs and outputs; they will accommodate bare wire or spade connectors up to 1/4" wide.

Tweeter Level: A switch in each crossover allows you to adjust the output level of the tweeter; choose 0 dB or +2 dB.

Mounting: Each crossover can be mounted using two of the included screws through two holes in the base.


  • Length: 2.625"
  • Width: 1.825"
  • Height: 0.940"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

The quality of the build. Numbers do not lie. [ Shawn  Jun 03, 2017 ]
I like the way JBLs sound. I wanted components. This seemed like a good fit. [ Robert  Feb 28, 2017 ]
Heard good things about them [ Herman  Dec 15, 2016 ]
Best speakers i ever heard in a car!!!! [ Kevin  Sep 05, 2016 ]
Recommended by representative and I trust the brand JBL makes high quality speakers. [ SHAMIR  Jul 17, 2016 ]
Reviews looked pretty good for the price [ David  Jul 05, 2016 ]
I wanted to upgrade the sound in my truck and chose speakers that would fit without vehicle modification of my truck. [ Michael  Jun 27, 2016 ]
Chance - put everything in my cart that will work with my vehicle. Chance's Bio: [ Ed  Jan 18, 2016 ]

4 questions already asked

Thanks for your question. The impedance is listed as 4 ohms. You can find this information on the product page "Details" tab under "Specifications". Hope this helps. [ Kenny  Apr 14, 2017 ]  Staff
Yes, the crossover included in the kit has a selector switch for choosing attenuation. [ Mike  May 26, 2016 ]
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Aug 17, 2015 ]  Staff
They sound great, in a 65 vette. But it is a after more head unit so I can't really answer you question. [ JOHN  Mar 02, 2015 ]
I have these installed in a 2012 Camry with the stock system (lowest level system) I also put some 6x9 JBL in the rear deck. With my unit they amplify the noise a bit and the deck is really tuned out to make the old speakers sound better. This means I have to turn the bass and treble down (even to negative values) to get some good sound. This does indicate that the speakers are great but the deck is really de-tuned. The bass is still strong and the clarity is good. I will definitely be putting in a new deck now that I can hear more of what the old deck is putting out. This is likely with any speaker upgrade on a factory system but these speakers are great so far. [ MARK E  Mar 02, 2015 ]
I used them with a stock Kenwood am/fm/cd/usb receiver. the oem speakers were so loud with the Kenwood receiver, I figured it had had enough juice. Unfortunately, these speakers needed an amp to get the bass and sounds levels I desired. I added a blaupunkt power pack to get that extra kick these speakers need. If I had to do it over again, I would not have picked components but rather something much more efficient. [ kenneth  Mar 02, 2015 ]
I installed them with a stock jbl audio premium system and have been impressed with the clarity and the bass [ SHAWN  Mar 02, 2015 ]
I have these in a 2015 outback. They sound great with the stock head unit. I have been very pleased with purchasing these speakers. [ Adam  Mar 02, 2015 ]