I just took delivery of a pair of MA GR20's and have been playing around with them a bit but I've run into a problem. I hooked them up using my P25 for low frequency and the P35 for high frequency. I then decided to swap things round so I switched everything off and swopped the cables over at the speaker end. Turned it all back on, the lights did the usual amber then green thing and I pressed play.No sound from the P35 at all!! Now you may be thinking I've done something stupid like switch the speaker buttons off by accident but this isn't the first time it's happened. It happened the day I got it when I did the same thing with my old speakers. Last time I called Crustyloafer at Sevenoaks (where I bought it) who wasn't sure what could be at fault so I went away and re connected everything and all of a sudden it worked fine. Now I know the P35 has worked connected to both the LF and HF speaker connections since I've had it but I can't understand why it seems to go pair shaped when I try a quick swap from one to the other. Have I got a dud power amp or has this happened to anyone else?