Cool demo of the Metasonic R52

October 14, 2009 · Posted in Electronic Music

[youtube=http://www.youtube.com/watch?v=ibIROzaabbo&feature=player_embedded]

the r-52 uses two pentodes, type 12au6. the circuit is derived directly from our award-winning tm-2 filter, but with all the features of our tm-6 filter. a pair of bandpass filters is swept with a vactrol(tm) control element, a resonant treble filter and a less-resonant bass filter, giving a 4-pole lowpass response. filter sweep range (approx): bass-only 80-200 hz, bandpass/lowpass low setting 300-1000 hz, high setting 800-1900 hz. filter resonance/q adjustable from less than 1 to oscillation. voltage gain approx. 2 with resonance set to 10 o’clock position and input level set to maximum. both filters, or one at a time, may be selected and mixed in desired amounts using the front-panel response control. this allows for a wide range of equalization and special sound effects. cv inputs are available for sweeping the cutoff frequency and for affecting the treble filter’s resonance. circuit distortion is less than 0.5% typical.

power requirement: +-12v dc, 150 ma.