Just tested the input and it works perfectly. Very pleased.
All I need now is a half decent bluetooth module to connect to my phone in order to stream MP3's.
I just ordered one of these which seems to be robust.
http://www.fusionentertainment.com/m...ories/ms-bt100
I like this as its designed for Marine applications, is waterproof and runs on 12v DC. Will report back once I receive and install it.