I didn't want a head unit at all. So I have a system where the iPhone hooks to a HR Technologies iStreamer, which then goes to a JL Aidio CL-RLC then feeds directly into my amp. The iStreamer delivers excellent sound because it is a high quality DA converter and the CL-RLC acts as the pre-amp.



Obviously there is no iteration with apps and whatnot, but the sound is great.

Andrew