Impedance matching

Discussion in 'DIY Discussion' started by bob golding, Jan 11, 2019.

  1. bob golding

    bob golding

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    hi i am designing a small PA system using active speakers. i am planning to use 2 4 ohm exciters per speaker with one exciter connected to each channel of a class d amp. as i am splitting the input between 2 separate amps anyone know what effect this will have on the input input impedance of the amps and how to compensate for any mismatch?
     
    bob golding, Jan 11, 2019
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  2. bob golding

    Sergeauckland

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    The two amplifiers will presumably have their inputs in parallel, so the input impedance as seen by the source driving the amps will be halved. So, if each Class D amplifier has an input impedance of 10k, say, the source will be driving 5k.
    In practice, that will be fine, as any decent source will drive 5k perfectly well.

    S
     
    Sergeauckland, Jan 15, 2019
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