How power amps handle big loads

June 6, 2022
 by Paul McGowan

5 comments on “How power amps handle big loads”

  1. Yaaaay…the whiteboard is back πŸ˜€
    (Someone had to say it)

    And this is why my Musical Fidelity – ‘M6si500’ has twelve (12) big bipolar transistors
    on the left channel & twelve (12) big bipolar transistors on the right channel.
    I’m guessing that 2 ohms can be considered a ‘big’ load πŸ˜‰

  2. Nice play on the whiteboard and really decent technical descriptions.
    As far as the artwork is concerned, don’t quit your day job. πŸ˜‰

  3. Ahh got it. I think. What sounds better Bipolar or MOSFETS? MOSFETS are said to clip softer like tubes and are said to be tube like in character but there are some pretty great sounding bipolar amplifiers out there so what gives? Is it more the design of the amplifier then the type transistors used?

    1. I suspect that if you’ve got an amp that can produce 500 watts rms into
      8 ohms per channel, getting said amp to clip is going to be a real challenge.
      I think that Paul uses MOSFETs in his BHKs.
      The current one, the BHK-300, max’s out at 300wrms/ch/8ohms & the
      soon to be released ‘BHK-600’ will max out at around 650wrms/ch/8ohms.
      Then there’s the ‘D’ class PS Audio ‘M-1200’ which produces 600wrms/ch/8ohms.
      Nothing like headroom to keep you away from clipping πŸ˜‰

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