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Thread: Boulder amp from hell...

  1. #201
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    Quote Originally Posted by ddk View Post
    Their name is very descriptive of character of their sound, that's why many don't care for them!

    david
    +1

  2. #202
    VIP/Donor [VIP/Donor] microstrip's Avatar
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    Quote Originally Posted by marty View Post
    Boulder amps are one of those oddities in that they just don't get much respect in some audiophile circles. However, it should be noted that according to Boulder, all of their behemoth amps are optimally designed to work with 220V and NOT 110V as most of you have commonly heard them. Believe me, the difference is astonishing. I heard this effect from an AC line voltage change on Brian Flowers' Alexandria based system back in DFW a few years ago (with the 2060) and was astounded at the difference.(...)
    Probably the problem was with the 110V mains power line. 220V requires half the current, so the relative voltage drop will be half. Another possibility is that the amplifier has a very poor mains noise rejection and the 220V balanced supply cleans it, but I find difficult that such an high quality amplifier suffers from such problems.
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  3. #203
    [Industry Expert] ddk's Avatar
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    Quote Originally Posted by microstrip View Post
    Probably the problem was with the 110V mains power line. 220V requires half the current, so the relative voltage drop will be half. Another possibility is that the amplifier has a very poor mains noise rejection and the 220V balanced supply cleans it, but I find difficult that such an high quality amplifier suffers from such problems.
    No, it's crappy transformers if that is true!

    david
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  4. #204
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    Quote Originally Posted by microstrip View Post
    Probably the problem was with the 110V mains power line. 220V requires half the current, so the relative voltage drop will be half.
    A 220V input amp will be four times as tolerant to the mains impedance as a 110V input version. Or put another way, the 220V version will sound like you've installed 4X the current capacity mains wiring, compared to the 110V.

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