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Performance: JBL Header Total:: 21786278598218050 - 21786278985646050 = 387428 micro seconds
Performance: product-images:: 21786278989347050 - 21786278990942050 = 1595 micro seconds
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 Unipoint™ 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

Product Specs, Manuals & Compatibility

Compatible with TVs, Laptops, and Mobile devices
Manuals & Downloads
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
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
Dimensions
External Diameter (in)
3-15/16
External Diameter (mm)
100
Mounting Cutout Diameter (in)
3-1/2
Mounting Cutout Diameter (mm)
89
Mounting Depth (in)
2
Mounting Depth (mm)
51
Warranty
USA Warranty Length
1 Year Warranty
Product Features
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.
JBL I-Mount™ for easy installation
I-Mount™ (patent no. 5,859,917) allows for more precise imaging and simplifies tweeter installation, with angle-, surface- or flush-mount options. It’s a tweeter mounting system that makes for one of the easiest and most versatile installations you’ve ever done.
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.
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Performance: features:: 21786278991850050 - 21786279020974050 = 29124 micro seconds
Performance: reviews:: 21786279029174050 - 21786279044473050 = 15299 micro seconds

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GTO428 - 105-watt, two-way coaxial 4
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Performance: dealer:: 21786279045798050 - 21786279053517050 = 7719 micro seconds
Item #: GTO428

GTO428

The drop-in speaker upgrade your dash or doors are waiting for.
$99.95 per pair
Availability: In-stock and ready to ship.
Why buy direct from JBL.com?
Free Ground Shipping
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Lifetime Support
Performance: details:: 21786279060712050 - 21786279118761050 = 58049 micro seconds
Performance: PDP Total:: 21786278593475050 - 21786279130535050 = 537060 micro seconds