Ive sussed it! Just went out and had a play after swapping the RCA leads onto the non fading ones, didnt work at first, then had to set it to the non fading ones in standby mode on the headunit, then had to put it on CD/Tuner and turn the preout up, awkard as hell headunit, prefer Alpine myself! Absolutely thumps! Don't think the neighbours were too impressed though !

Thankks