Drumfire DF500 In Line Effects

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"1980s vintage Drumfire DF500 analog drum synthesizer... This unit was made in Japan and operates on 117V power, it has an attached 3-prong plug.

There are 5 identical channels, each has the following:
---1/4" trigger input with a sensitivity knob that can accommodate various trig voltages
---oscillator decay
---noise decay
---sweep
---pitch
---click on/off
---osc/noise balance
---volume
---pan (for stereo out)
---1/4" channel audio output
Additionally, there is a stereo output with individual L/R volume pots, a headphone output and a footswitch input. I'm not sure what the footswitch is supposed to do since there is no sequencer to stop/start but everything else is tested and working well."