GRAND TOURING GTO 428 - Black - 4 inch 2-Way - Hero GRAND TOURING GTO 428 - Black - 4 inch 2-Way - Hero GRAND TOURING GTO 428 - Black - 4 inch 2-Way - Front
GRAND TOURING GTO 428 - Black - 4 inch 2-Way - Hero


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.
Introduction Year 2008 Made in China Predecessor Product GRAND TOURING GTO 427 Successor Product GTO429

Product Specifications

General Specifications

Size 4"
Series Grand Touring
Type Two-Way

Audio Specifications

Nominal Impedance 2 ohms
Sensitivity (2.83V@1m) 90dB
Frequency Response 65Hz–21kHz
Power Handling (Peak) 105W
Power Handling (RMS) 35W

Dimension Specifications

Mounting Depth (mm) 51
External Diameter (in) 3-15/16
Mounting Depth (in) 2
Mounting Cutout Diameter (in) 3-1/2
Mounting Cutout Diameter (mm) 89
External Diameter (mm) 100

Speaker Specifications

Crossover Frequencies Onboard
Controls/Adjustments None
High-Frequency Transducer 25mm (1") balanced-dome My-Ti™ dome
Low-Frequency Transducer PlusOne® HCL™ honeycomb-laminate cone
Please consult the documents for in-depth specs

Documents & Downloads

What’s in the Box

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

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