Item# GTO6428



120-Watt, Two-Way 4" x 6" Speaker System
$89.95 per pair $99.95


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Does It Fit My Car?


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.

What's in the box?

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

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The JBL-only Plus One® woofer cone is exceptionally stiff and lightweight with up to 25 percent more active surface area than you’ll ever find on competing models of the same size. You get an audible boost in bass output and efficiency.

Listen loud. It’s a high-bandwidth, edge-driven dome tweeter with a large voice coil, like high-end home audio loudspeakers. The My-Ti™ construction (a proprietary Mylar-titanium composite) delivers great power handling. Extended high frequencies. And seamless integration with the woofer.

By using a built-in crossover network with advanced high and low pass filters, the GTO6428 creates a smooth transition between the woofer and tweeter. The result? Midrange vocals that sound so natural and lifelike, you’d think the artist was sitting in the passenger seat.

The GTO6428 is compatible with aftermarket head units and factory-installed systems. Designed as replacements for impotent factory-installed OEM speakers, the GTO6428 is easily installed without any special tools or modifications.

Low-Impedance, three ohm voice coils compensate for the undergauged speaker wiring found in many of today's cars, and make the most of every watt your amplifier or head unit can deliver.

This muscular speaker offers 120 watts of peak power handling. Hit the gas and have fun.

Doing it yourself? The GTO6428 easily installs into nearly any factory 4-inch by 6-inch location without any special tools or additional modifications. You'll be listening to your new JBL® speakers in no time at all.

Grand Touring
4 x 6
Power Handling (RMS)
Nominal Impedance
2 ohms
(2.83V@1m) 91dB
Power Handling (Peak)
Frequency Response
Crossover Frequencies
Low-Frequency Transducer
PlusOne® HCL™ honeycomb-laminate cone
High-Frequency Transducer
25mm (1") edge-driven My-Ti™ dome

1 Year Warranty

Products purchased online or from an authorized local retailer and under warranty may qualify for an exchange with a valid receipt.

Purchases made from an unauthorized dealer will not be elibible for exchange.

Request an Exchange

Call us: 1.800.336.4525

  • Sales and pre-sale assistance
  • Technical help
  • Parts and accessories


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
  • 2015-11-29T07:04CST
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  • co_hasreviews, tv_0, tr_1
  • loc_en_US, sid_gto6428, PRD, sort_positive
  • clientName_JBL

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JBL GTO6428 4-Inch x 6-Inch 2-Way Loudspeaker
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Sonic Electronix
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