Amazon.com: JBL GTO Series Premium 4 x 6 Inches Co-Axial Speakers Pair with Patented Plus One Woofer Cone, Silk Dome Tweeters - Set of 2 Bundled with Earbuds : Electronics
JBL GTO609C 6.5" GTO Component Car Speakers System
Amazon.com: JBL GTO608C 6-1/2" 2-Way Grand Touring Series Component Car Speakers System : Electronics
JBL Stadium GTO600C Stadium Series 6-1/2" component speaker system at Crutchfield
GTO429 | The GTO series provides a completely new musical experience in your car
JBL GTO-504EZ 4-channel car amplifier — 50 watts RMS x 4 at Crutchfield
JBL GTO629 120W RMS 6.5" 2-Way Coaxial Car Speakers