Item# GTO328
  • Select Color
Product Actions
Add to cart options
Does It Fit My Car?

Additional Information
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® GTO328 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.
At A Glance:
  • Patented Plus One® woofer cone
  • Increased power handling with My-Ti™ tweeter
  • Optimal imaging with Unipoint™ rotating tweeter
  • Outstanding audio output
  • Can be driven by any head unit
What's in the box:
  • (2) GTO328 3-1/2” two-way loudspeakers
  • (1) Owner's Manual
Product Features:
  • Patented Plus One® woofer cones
    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.
  • Increased power handling with My-Ti™ 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 aim it 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 25 watts RMS, 75 watts of peak power handling, 89dB sensitivity, 2-ohm impedance and an accurate frequency response of 90Hz to 20kHz. 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.
Manuals & Downloads:
General Specifications:
Grand Touring
Audio Specifications:
(2.83V@1m) 89dB
Power Handling (Peak)
Nominal Impedance
2 ohms
Power Handling (RMS)
Frequency Response
Speaker Specifications:
Crossover Frequencies
High-Frequency Transducer
25mm (1") balanced-dome My-Ti™ dome
Low-Frequency Transducer
PlusOne® HCL™ honeycomb-laminate cone