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Metasonix R53


Vacuum-Tube Waveshaper and Ring Modulator

The R-53 is directly derived from Metasonix’s legendary TM-1 device. It uses a 12AF6/BD6 remote-cutoff pentode and a 12AV7 dual triode.

Waveshaping is provided by a vacuum-tube “pulser” circuit that spits irregular pulses onto the input waveform. They synchronize erratically with the input pitch (if a waveform with sharp transitions is used). Combined with true vacuum-tube circuit distortion, this can provide a vast range of complex, aggressive distortion effects, utterly unique in the world.

A basic ring-modulation function is also available in the unit-applying a carrier pitch from an external oscillator to the screen grid of the pentode, this allows making inharmonic sum-and-difference pitch sound effects, with a unique vacuum tube pentode sound.


  • +/-12V Doepfer-style power connector
  • alpha rk12l potentiometers
  • kobiconn vertical-mount 3.5mm jacks
  • Current Consumption: 200mA
  • Panel size: 22HP

Other modules by Metasonix | R-51 | R-52 | R-54 Mk2 | R-56 Reverb | R-57 Dual VCA (last one – once it’s gone it’s gone!) | R-60 | RK1 Noisedrum | RK2 XS-VCA