This is neat solution for those looking to add a subwoofer amplifier to their system. It's stackable, meaning it is attached to the back of the head unit in the dash. Can work with any decently spec'd head unit. Really clean. Really neat.
https://www.crutchfield.com/S-hVHVh...KTA-200M-Power-Pack.html?tp=1&omnews=17380674
https://www.crutchfield.com/S-hVHVh...KTA-200M-Power-Pack.html?tp=1&omnews=17380674