Usher Amp & Pre?

i still have the cybers and prefer them to the r-1.5. at 78 tube watts they have more than enough power for the 6381's. i even have a jolida 502b (60 watts) that will drive the ushers. the 6381's are a tube friendly speaker.

Interesting response. Most of what I've read is that our speakers are difficult to drive properly with tubes (with enough muscle). The impedance curve isn't too bad,I always thought it was due to its sensitivity and power rating.

There are other posts around here that concur with tubes vs SS for these Ushers, concluding that SS drives them better.

I am intrigued with at least trying a tube amp...perhaps something like a Rogue stereo amp where the power/price ratio is within reach.

Does anyone know how much power the R1.5 produces in class A?

it's rated all 150 as class a but it can't biased full out as there is not a lot of heat, some but not a lot. none of the reviews i've read questioned it being 100% class a.

I've read it is class A for the first 50w, class a/b after that. It also says "ideal" class a on front, which suggests something other then pure class a. I've found nothing definitive, but here is a link to an Usher retailer, with several links to reviews.