JBL Grand Touring Series GTO1004D 10" subwoofer with dual 4-ohm voice coils at Crutchfield
JBL GTO804 8" Grand Touring Single 4 ohm Car Subwoofer
Amazon.com: JBL GTO Series Premium 6 x 8 Inches Co-Axial Speakers Pair with Patented Plus One Woofer Cone, Silk Dome Tweeters - Set of 2 Bundled with Earbuds : Electronics
JBL GTO1214BP - Adam Rayner Talks Audio
JBL GTO1202D Grand Touring 12" Dual 2 ohms Subwoofer GTO 1202D #1076 Great Used Condition | Reverb
JBL GTO804 Grand Touring Series 8" 4-ohm subwoofer at Crutchfield
JBL GTO1002D Grand Touring Series 10" Dual 2 ohms Subwoofer GTO
JBL GTO Series GT120 12" 4-ohm Subwoofer at Crutchfield