Yamaha MVS-1 as passive pre-amp

Discussion in 'Archived Threads 2001-2004' started by Richard Slay, Apr 13, 2002.

  1. Richard Slay

    Richard Slay Extra

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    I am interested in picking up a Yamaha MVS-1, a passive switcher and volume control made in the early '90s, which seems to be the only one with five channels. I would like to connect this to an inexpensive DVD-audio player. What do I need to know about impedances and sensitivity to make this work?

    The info on my amp is:

    input impedance: 20 Kohms

    sensitivity: 1.15 volts for rated power

    gain: 29 dB

    Thank,

    R. Slay
     
  2. Richard Slay

    Richard Slay Extra

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    Just had to add e-mail notification for myself.
     
  3. Cliff

    Cliff Stunt Coordinator

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    Richard,

    This is a versatile box that I have used for a variety of purposes over the years. I'm not sure how you intend to use it, but you need to be aware that the switcher part, which allows you to select among 3 sources plus a tape loop, is only for 2 channels. The output of the selector is then sent through 2 channels of the 6-channel volume control. The other 4 channels of the volume control were intended for the front and rear effects channels in Yamaha's early stand-alone DSP sound processors, which did not include on-board volume control.

    Regarding impedances, here is all of the information provided in the manual:

    Input impedance for 2-channel selector (inputs 1-3): 33 kohms

    Input impedance for tape: 50 kohms

    Input impedance for 6-channel volume control: 10 kohms

    No specs are given for output impedances.

    Hope this helps.

    Cliff
     
  4. Richard Slay

    Richard Slay Extra

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    Thanks, Cliff.

    I think that's a large part of the puzzle right there.

    R. Slay
     

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