sorry boys to ruin your day but,
i work in a commercial operation and we have a portable CD player hooked in our pa32 300 works great the only hassle is the turb on rough day but usaully sweating to much to worry about music,no hassles thru the intercom or the DC 13.4.
sorry mate don't know anything about the wiring can find out from our engineer next time i see him.but the power is thru the lighter jack and play comes thru the play jack on the intercom.
more +'s than -'s NZ CAA won't let us install one in our IFR a/c due too much paper work for them just the usual crap reason?
need anymore info?