135-Watt, Two-Way 5-1/4" Speaker System

Sold from 2008 until now

Predecessor Product: GRAND TOURING GTO 527
Successor Product: GTO529
Made in: China

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Product Specifications

Grand Touring
Power Handling (Peak)
(2.83V@1m) 91dB
Nominal Impedance
2 ohms
Frequency Response
Power Handling (RMS)
Mounting Cutout Diameter (mm)
Mounting Cutout Diameter (in)
Mounting Depth (mm)
Mounting Depth (in)
External Diameter (mm)
External Diameter (in)
Low-Frequency Transducer
PlusOne® HCL™ honeycomb-laminate cone
Crossover Frequencies
High-Frequency Transducer
25mm (1") edge-driven My-Ti™ dome, pivoting
HF cut: 0dB/-3dB

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® GTO528 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.

The JBL-only Plus One® 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.
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.
Another JBL® feat of engineering: You can rotate the tweeter pod nearly 350 degrees to aim it at the listening position for better high-frequency response and optimal imaging.
The GTO 528 allows the tweeter level to be adjusted 0 to +3 decibels to compensate for low and off-axis mounting positions or road noise.
This speaker offers 45 watts RMS, 135 watts of peak power handling, 91dB sensitivity, 2 ohm impedance, and an accurate frequency response of 65Hz to 21kHz. Hit the gas and have fun.
This JBL® Grand Touring™ Series speaker is designed to fit right into factory locations with little or no modification.
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.

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