No matter how you look at it, this breed is here to stay. It is no longer content in subwoofers or Japanese mass-market receivers. To date, such amps are still viewed as the challengers of the status quo. Accordingly, they find themselves compared against the best of traditional linear amplifiers - by Pass Labs, McCormack, Krell, Levinson and Classe. So far, I'm not aware of a strong consensus that the new breed is better than the old. Rather, most commentary I've seen is surprised by how close in performance the new gets to the old - for often considerable less money, less heat and less size. Can the day be far away when a particular design -- or the genre as a whole -- advances far enough to be considered "as good" or "better, period" than the old? Will traditional Class A at least in transistor designs eventually be rendered obsolete?
If Audio Research, Conrad Johnson and Cary Audio are the three most established American tube electronics lines (with BAT being younger), the fact that two out of the three now offer Class D amplifiers seems telling. Arguably the real test will be the appearance of one such amplifier from a traditional Class A amplifier maker to suggest perhaps not superiority but full equality. Will we see an analog switching amp from Krell or Bryston? Your guess is as good as mine. But it now does seem like a distinct possibility, doesn't it? It's also noteworthy that valve makers would embrace this genre as though to whisper "it's perhaps not the same but it's darn bloody close - with no headaches". And of course Jeff Rowland has long since embraced the Class D topology as equally worthy of impeccable implementation as traditional Class A. It seems the new force really is with us now for good. |
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