Item# GTO428



105-Watt, Two-Way 4" Speaker System
$53.34 per pair $99.95


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Does It Fit My Car?


Imagine car audio so full of big boom, soundstage and detail, you’ll want to flick your rear view mirror just to see what your passengers in the back think. The JBL® GTO428 includes JBL® engineering triumphs like a Plus One® woofer cone, a My-Ti™ tweeter and a Unipivot™ rotating tweeter mount. Have a superior ride, just like that.

What's in the box?

  • (2) GTO428 4” two-way loudspeakers
  • (1) Owner's Manual

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General Specifications

Grand Touring

Audio Specifications

Nominal Impedance
2 ohms
(2.83V@1m) 90dB
Frequency Response
Power Handling (Peak)
Power Handling (RMS)

Speaker Specifications

Crossover Frequencies
High-Frequency Transducer
25mm (1") balanced-dome My-Ti™ dome
Low-Frequency Transducer
PlusOne® HCL™ honeycomb-laminate cone


Patented Plus One® woofer cones

The JBL-only woofer cone (patent no. 7,548,631 B2) is exceptionally stiff, lightweight, and has up to 25 percent more active surface area than you’ll ever find on competing models of the same size. You get an audible increase in bass output and efficiency.

Increased power handling with My-TiTM tweeters

My-Ti™ tweeters deliver increased power handling, reduced distortion and increased efficiency. A Mylar®/titanium composite dome makes way for open, smooth spacious sound, and a seamless transition between the middle and high frequencies.

Optimal imaging with Unipoint™ rotating tweeter

Another JBL feat of engineering: You can rotate the tweeter pod nearly 350 degrees to point at the listening position for better high-frequency response and optimal imaging.

True 4 Ohm Technology

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.

Outstanding audio output

This speaker offers 35 watts RMS, 105 watts of peak power handling, 90dB sensitivity, 2 ohm impedance, and an accurate frequency response of 70Hz to 21kHz. Hit the gas and have fun.

Can be driven by any head unit

This JBL® Grand Touring™ Series speaker is designed to fit right into factory locations with little or no modification. It’s a perfect speaker for upgrading stock dash and door locations.

Warranty 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

Product Support

Call us: 1.800.336.4525

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  • Technical help
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