GTO939 | This JBL series incorporates many patents that are also found in JBL's pro speakers
JBL GTO939 6"x9" 3-way car speakers + Adapters for Select Lexus and Toyota | eBay
JBL GTO939 GTO Series 600 Watts 6" x 9" 3-Way Coaxial Car Audio Speakers 6"x9" 50036313773 | eBay
Amazon.com: JBL GTO939 Premium 6 x 9 Inches Co-Axial Speaker - Set of 2 : Electronics
JBL GTO939 GTO Series 600 Watts 6" x 9" 3-Way Coaxial Car Audio Speakers 6"x9" 50036313773 | eBay
Amazon.com: JBL GTO629 Premium 6.5-Inch Co-Axial Speaker - Set of 2 : Electronics
JBL GTO939 - ShopMania
JBL GTO939 | 6" x 9" GTO Coaxial Car Speakers with Accessories
Amazon.com: JBL GTO629 6.5/'' GTO 2-Way 360 Watts MAX Power Grand Touring Series Coaxial Car Audio Speakers Bundled with Alphasonik, GTO629+Alpha : Electronics
JBL GTO 939 GTO Series 600W 6x9" 3-Way 3-Ohm Coaxial Car Audio Speakers 50036313773 | eBay
JBL GTO-939 - YouTube
Amazon.com: GTO939 A 6'' x 9'' (160mm x 230mm) three-way speaker with adjustable-level tweeter : Electronics