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In Reply to: Which Threshold amp posted by E-Stat on April 28, 2007 at 13:08:54:
The 900wpc was for the QSC. I apologise if the post was not clear.
Give Me Ambiguity or Give Me Something Else!
Follow Ups:
If you found use for the extra 9 db afforded by the QSC amp, then I'm not at all surprised you found favor with the unit.
though I do admit it is nice to have that sense of macrodynamics on big music. Hearing more realistic drum thwacks, with all the overtones intact, whilst a flute is doing its thing, is pretty amazing. The QSC gives these panels a good deal of a horns attack, with what I consider to be the better coherence behaviour of these panels. All part of the trade-offs we make....The ability of the QSC to handle major bass notes while not losing any of the high frequency stuff is much better than in the T-200. I suspect that it may have to do with the much faster recovery of the switchmode power supply over the linear one.
I am not saying the QSC is the Second Coming of amplifier design. I would not be suprised if on more efficient speakers, the T-200 might end up ruling...as long as the amp never needs to go past 1/8 throttle it may prove superior on fine detail and harmonic structure. Or not. Same for the Atma-sphere amp; give it the speaker load it wants and it no doubt could cream the QSC. But on difficult loads requiring power and control, the QSC rocks.
Give Me Ambiguity or Give Me Something Else!
Well if I am not mistaken your Analysis Omegas are not a particularly difficult load. 4 or 5 ohms, pretty darn flat and largely non-reactive load is it not? About 87 db/watt sensitivity as well. Ok, the Art audio is definitely at the lower limit. The Atmasphere was also probably not delivering much power into this load (maybe only about 20 watts).However; either you have a very large room or like to listen insanely loud to need 900 watts from this speaker. You will have long before reached its dynamic excursion limits. To reach 100db should only require about 20 watts of clean power (that's for a stereo pair at about 4 meters away). My guess is that it is peak rated up to about 110db which still would be well under 900 watts (more like 250 watts).
BTW, I do agree with you that a lot of amps sound compressed even well within their limits. I am surprised to hear that the QSC does not sound this way.
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