If you have a Honda or Acura from years 1998-2008 this harness will allow you to retain your factory amplifier when upgrading to an aftermarket radio. This harness is meant to be used with vehicles that are fully amplified. This harness is not meant to be used with vehicles that only have an amplified subwoofer.
This is a general purpose harness and unless you are instructed to buy it by our staff or one of our youtube videos it will most likely not work for your installation purpose. This harness has 4 pairs of RCAs to power all of your door speakers. This harness also has the Steering wheel control leads added already so all you have to do it wire it together. The amplifier in your car with the 4RCA leads with generate the subwoofer out signal to power your factory subwoofer in some cases. In other cases the subwoofer will receive its own signal from a different RCA plug found in the vehicle.