So had a laps in car audio, but rocking a 2003 Corolla will do that!! So acquired some stuff for a newer old school system, but guess It is now old school. Think I am on on the Arc amps and ID sub, but need help with the HU that was awsome a bit ago. Pioneer DEH-880PRD. Know this was a good unit at the time, but my old ass now like the convience of using my phone for media. Seem to remember an auxiliary box or something. Help please!