Tried out a bunch of diffent combinations of Mac, Usher and Levinson amplification yesterday. Aside from the fact that I learned that Mac is not the sound I'm looking for, there were a couple of surprises:
1) The combination of the Levinson 326S pre amp and the Levinson 532h power amp does not work well. Very dull and kind of washed out in terms of sound. Strange - you'd think that all gear within a brand would work well together - not the case here. On other occasions I've heard the 326S pre amp with the 532 dual mono amp and the 53 monoblocks, and both were extremely good combinations...
2) The Levinson 326S pre amp and the Usher R-6.0 power amp (only $3,600 for 150 wpc amp) sounded fantastic! Huge open soundstage and slightly warmish, engaging sound. The only thing that was missing from the sound coming out of the Revel Ultima Studio 2s was the lowest of low frequencies. The Usher R-6.0 is a real sleeper, high value product that's worth checking out!