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  • Amplifier cuts out

    I have a karaoke mixer amplifier rated 50 watts per channel. It has three voice inputs off microphones. At one input I have a hisonic wireless dual mike setup. At the other two I have two dynamic hard wired mikes.
    The levels are set at midrange.
    Problem is that at certain periods - continuous input, the amp kicks out as in an overload condition. Zero input they reset and go back into overload with sustained inputs.
    Doing karaoke I cannot have this. The "performer's voice" kicks out, singing. [8]
    I had a mosfet amplifier 300 watts per channel that kicked out on overload, reset, then smoked it self. Fried the mosfet and associated wiring. Will the use of a bare bones power amplifier eliminate this problem or what?[^]

  • #2
    Sounds like you may have an impedance mismatch somewhere. Is the dual mic possible loading as two mics in parallel?

    I would check the impedance from the preamp output to the main amp input

    If your using coaxial cables, check the cable impedance too.
    R1 x R2 / R1 + R2 ??

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