Post by AudioHTIT on Apr 30, 2015 17:11:21 GMT -5
Interesting question. While I have seen some tube amps with slight variations in frequency response, I haven't seen seen a 'quality' amp that had enough variation in the audible spectrum that you'd want to compensate for it. Generally the sound of a tube amp is not attributed to variations in frequency response, therefor that function of Dirac shouldn't be affected enough to produce a different curve. I'd also doubt there would be any variations in the time domain, even though SS amps are typically much 'faster' (higher slew rate). I would speculate though for those who compensate their systems after running Dirac (more bass, etc), that the compensation might be different because the perception of what's 'missing' is different.
As to the OPs question, most of my adult life I had a pair of Dyna 50W monoblocks. Though I bought them for my guitar (to use with JBL's), I tried them with most of the speakers I owned; various Magnepans, Beveridge Electrostats, and B&W's. They always worked well, but weren't satisfactory with the big Maggies or ESLs for more than casual listening, I used my Threshold 4000 (200W x 2 Class A) most of the time. About 10 years ago I got the VTL MB450's to drive the big Maggies, and essentially skipped over the mid-range power tube amps. These are either 450W a side in pentode, or 200W in triode, I prefer the extra umph of pentode mode, they have plenty of power using anyone's scale. Bottom line IMO, is that the match between speaker, amp, room and listening habits is so variable, that making generalizations about power and sound is almost impossible (but that doesn't mean we shouldn't try). I have also used one of the original Mac 275's and if your considering that, it would probably do a great job with many speakers in many rooms (though I'd probably pick something different with the B&W 802's you were previously considering).