180-Watt, Two-Way 6-1/2" Speaker System

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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® GTO628 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.

Item# GTO628

General Specifications

Size 6-1/2
Type Two-Way
Series Grand Touring

Audio Specifications

Power Handling (Peak) 180W
Sensitivity (2.83V@1m) 92dB
Power Handling (RMS) 60W
Nominal Impedance 2 ohms
Frequency Response 50Hz–21kHz

Speaker Specifications

High-Frequency Transducer 25mm (1") edge-driven My-Ti™ dome, pivoting
Low-Frequency Transducer PlusOne® HCL™ honeycomb-laminate cone
Crossover Frequencies Onboard
Controls/Adjustments HF cut


Mounting Cutout Diameter (mm) 133
Mounting Depth (mm) 52
External Diameter (mm) 159
External Diameter (in) 6-1/4
Mounting Cutout Diameter (in) 5-1/4
Mounting Depth (in) 2-1/16
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  • (2) GTO628 6-1-2” two-way loudspeakers
  • (1) Owner's Manual

The latest owner's manuals, quick start guides, and documents.

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.

Call us: 1.800.336.4525

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GTO628 is rated 4.3 out of 5 by 3487.
Rated 5 out of 5 by from Great replacements for oem speakers Replaced shot OEM JBL speakers in a 2004 Toyota Tundra. Theese were a little bit smaller than OEM but nobody makes a replacement speaker in the nsize required by Toyota. They sound as good as originals but required a little bit of effort to install.
Date published: 2015-12-20
Rated 5 out of 5 by from Phenomenal Sound in a Jeep JK I replaced my stock speakers in my 2011 Jeep JK with these GTO628's in both the dash and sound bar; coupled with a new powerful deck (Pioneer DEH3600UI) and a JBL BassPro12... even with the top off going 50mph - the system sounds great.
Date published: 2014-05-11
Rated 4 out of 5 by from Great Speakers Poor Instructions Installed the GTO628's in my 2002 Sienna doors today to replace original JBL equipment. Sound and presence great with plenty of clarity and power handling. However the instructions do not detail which connector is plus or negative and the tweeter rotates but this is not spelled out in the lit. Also the bezel does not account for the detents in the ring so some dremel works required.
Date published: 2015-11-25
Rated 1 out of 5 by from 50% of them blew a cone within 3 months bought 2 sets, one set broke within a few months. Provided 50 watts rms via alpine amp. Blew cone.
Date published: 2016-02-01
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