120-Watt, Two-Way 4" x 6" Speaker System

$99.9599.95 per pair

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Pop the JBL® GTO6428 in any factory location with no special tools or modifications. You’ll suddenly have that big, booming bass and rich, crisp, detailed sound the JBL brand is famous for. In your car. Yes, your car. You’ll hear the power of JBL-patented Plus One® woofer cones and a My-Ti™ tweeter. A very large voice coil, like the best home audio speakers have, delivers crystal-clear, extended high frequencies for audiophile-quality performance. This is attention to detail rarely given to car audio. And it changes everything.

Item# GTO6428

General Specifications

Series Grand Touring
Type Two-Way
Size 4 x 6

Audio Specifications

Power Handling (RMS) 40W
Nominal Impedance 2 ohms
Sensitivity (2.83V@1m) 91dB
Power Handling (Peak) 120W
Frequency Response 75Hz–21kHz

Speaker Specifications

Crossover Frequencies Onboard
Low-Frequency Transducer PlusOne® HCL™ honeycomb-laminate cone
Controls/Adjustments None
High-Frequency Transducer 25mm (1") edge-driven My-Ti™ dome


Mounting Depth (in) 1-3/4
Mounting Depth (mm) 44
Mounting Cutout Diameter (in) 5-3/4
External Diameter (in) 6-5/16
External Diameter (mm) 160
Mounting Cutout Diameter (mm) 145
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Spec Sheet

English 1 MB
  • (2) GTO6428 4”x6” two-way loudspeakers
  • (1) Owner's Manual

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1 Year Warranty

Note: the Warranty Card provided with your JBL product contains the full terms and conditions of your warranty.

Unless a different warranty period is stated in the Warranty Card provided with your JBL product, JBL warrants for a period of 1 year (5 years for any non-powered speakers) from the date of retail purchase by the original end-use purchaser, that this product, when delivered to you in new condition, in original packaging, from a JBL authorized reseller and used in normal conditions, is free from any defects in manufacturing, materials and workmanship. Refer to the Warranty Card provided with your JBL product for specific details including what is not covered along with other terms and conditions.

Call us: 1.800.336.4525

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GTO6428 is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Best I've heard I installed these in a full size regular cab GMC pickup. And all I can say is WOW. these are the best sounding 4x6 speakers I've ever owned. They replaced speakers from another manufacturer that cots about twice as much. Those speakers were fatiguing to listen to at high volume for very long. One word describes these when there cranked up. "Smooth".
Date published: 2013-05-18
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difference between the GTO6428 and the GTO6429?

Asked by: TLane
The GTO6429 replaces the older GTO6428. They are basically the same. However, the GTO6429 has 3 ohms impedance instead of 2 ohms making it more compatible with other amplifiers/head units. The GTO6429 now has a top-mounting depth of 1-11/16 inches, as opposed to GTO6428 which had 2 inches of depth. And last, the 6429 can handle up to 45 watts RMS power while 6428 can handle 40 watts.
Answered by: Thaz at Customer Service
Date published: 2017-12-02

Due to space restrictions I need to mount theese externaly, is there a cover or grill I could use with these? Also, Which capacitor or "bass blocker" would I use to filter freequencies below 80Hz? I've read that theese are 2ohm, 3ohm and 4ohm...???

Asked by: MKwrench
Unfortunately, We don’t offer grilles because these are meant to be direct replacements in which case the grille would already exist. However, you can purchase any universal/standard 4x6 grille on the market. You can choose a bass blocker based on the 2 ohm rating.
Answered by: Memen at Customer Service
Date published: 2017-02-21
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