I have usher rw729 and drive them with jeff roland model 6 monoblocks;a very nice match with a tube like presentation that is very close to my audiovalve challanger 180 monoblocks.
Thanks for all the responses - I currently own a Music Hall Mambo integrated putting out 50 all class 'A' wpc. I couldn't get my head around the 87db efficiency rating & if I would be able to listen to music on the 'loud' side once in a while.
The CP-6311 is not too difficult to drive. I drove a pair temporarily with a Peachtree Decco which has a 50 watt chip amp and it sounded great even at moderate levels. 50 class A watts should work just fine.
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