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Do attenuators effect amps w/negative feedback more?

Discussion in 'Amps and Cabs' started by tibbon, Feb 29, 2012.

  1. tibbon

    tibbon Member

    Apr 9, 2010
    Columbus, OH
    I'm reading about amp building, and it occurred to me that using an attenuator could potentially effect amps more that use negative feedback if they aren't able to get the feedback in line with the speaker the same way. Is this the case? Just curious. Haven't A/B'd or done any experiments yet.
  2. Bruce Clement

    Bruce Clement Gold Supporting Member

    Jan 4, 2010
    San Francisco
    No effect. The NFB occurs within the amp, so the type of load - speaker, attenuator, dummy load - has no effect. I suppose one could argue that a purely resistive load would present slightly different impedance values at various frequencies than a speaker would, which might change the NFB voltages slightly. But I think the key word here is "slightly."
  3. CaptainJake

    CaptainJake Member

    Jul 12, 2007
    The market has produced models with resistive and reactive loads, so it makes a difference to some - YMMV.

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