Originally Posted by parapaul
Bump for this thread - I want to know the same thing.
Once the HU is recoded to HiFi the outputs are low level 5V outputs. Do I then need to make them into RCAs to connect to the amp, and if so, will any old RCA adaptor work?
As Makkan says you need to make sure your amp takes balanced differential inputs. Then just add RCA connectors to your speaker out from your HU and connect to the RCA in of the amp.