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each producing a damped sine wave at a different frequency
Ultra rugged die-cast aluminum chassis
[BTW the input signal doesn't have to be a pulse
TS front: 1 MΩ
This is a demo unit that has seen just a few hours of use
1970's Altec 9860A Active Equalizer Synth Controllers each producing a damped sine1970's Altec single channel 1 3rd octave active graphic equalizer in excellent condition. Frequencies are cut only with a +10 db gain stage boost. There are also three high pass and three low pass filters. The green front plate protects your settings once it is screwed into your rack.
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