Bass Box JBL GT Series Speakers & Amp. - Speakers & Subwoofers - Marysville, Washington | Facebook Marketplace | Facebook
![JBL GT-BASSPRO12 - Superior 12 Inch Ported Powered Car Subwoofer - Amplified sub boxes - Online Car Audio & Stereo Store JBL GT-BASSPRO12 - Superior 12 Inch Ported Powered Car Subwoofer - Amplified sub boxes - Online Car Audio & Stereo Store](https://www.customsounds.com/uploads/products/aab977b2b5d4d6a15e60cd377a54aba30d2ab33e.jpeg)
JBL GT-BASSPRO12 - Superior 12 Inch Ported Powered Car Subwoofer - Amplified sub boxes - Online Car Audio & Stereo Store
![Amazon.com: JBL GT-BassPro12 12-Inch (300mm) Car Audio Powered Subwoofer System, black : Electronics Amazon.com: JBL GT-BassPro12 12-Inch (300mm) Car Audio Powered Subwoofer System, black : Electronics](https://images-na.ssl-images-amazon.com/images/I/81Hzke7ZPyS._AC_UL210_SR210,210_.jpg)
Amazon.com: JBL GT-BassPro12 12-Inch (300mm) Car Audio Powered Subwoofer System, black : Electronics
![JBL GT Bass Pro 12 vs. Rockford Fosgate P300 12 - Battle of Powered Subwoofers - Decibel Results!! - YouTube JBL GT Bass Pro 12 vs. Rockford Fosgate P300 12 - Battle of Powered Subwoofers - Decibel Results!! - YouTube](https://i.ytimg.com/vi/-lUsmGzayIQ/maxresdefault.jpg)