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


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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

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 eligible for exchange.

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