If anyone is looking for an easy way to upgrade their JBL sound system this harness will help you get it done. The harness is 10ft long and includes every channel powered by the factory amplifier. Link here: https://www.audxsound.com/products/tyah22uf10
Has anyone upgraded their JBL sound system? What are the subwoofer options? I tried the beat sonic amplifier but don't like the noise floor, I want something better.