Cheers for that Bill, much appreciated, its now on my favourites, a good little read as well, In the interim, I did phone a mate before my purchase of a replacement driver, bearing in mind i couldnt get a gk oem unit, shame on them...He is the design engineer for riga research, the hi fi company, also made and designed roost amps and three g mixers and power amps in the 80's and 90's, his attitude was that it would be fine, so if its good enough for him its truely good enough for me, the amp shouldnt fry, there arnt any hi fi heads listening to me at gigs with imperfect acoustics and my rig breathes again.