Thanks for the replies, and the welcome. I found these amps in a thrift store while I was travelling, I've now got home and hooked them up, they do power-up, but no output. Ah well!! Probably a bit overkill anyway, but I sure would have liked to see what 260 wpc would do for me... lol. I'll lift the lids of 'em, and see if there is anything obvious at fault.