First off nice Bagpuss pic,the way it started was i was using the b60 as is to drive PSB silverI speakers,all was welluntill i biamped with an old adcom ga555 and found it had alot more punch,then i changed to an old 4b(1985) and it was even better.I now have the new 4bsst but i do not biamp i just use the b60 as the preamp and a marantz cd67se as a transport it really does sound great.I also added the PSB sub7 and that has also added to the bottom end. cheers from canada cliffe