MB-27 (Mute Box) w/Original Packaging

Effect Information

“This rare effects box produced by Shin-ei (Japan) in the
late 60s or perhaps early 70s includes five controls in addition to
the on-off switch.”

They are as follows:

  • A mode dial that selects low
    pass, band pass, or high pass
  • A peak dial
  • a gain dial
  • a low
    range/high range switch to select the frequency range being filtered
  • and an up/down drive selector that controls the direction of the filter
    sweep

“It is powered by two 9V batteries which are
very easy to access. The bottom swings out after
loosening the easily turned thumbscrews.”

Archived past online sales data:

Effectsfreak legacy website (includes sales data 4/2008 - 4/2021)

Mute Box (Envelope Filter) w/Original Packaging
RT-18 (Resly Tone)

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