Bi-Phase II Vintage Silver

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The Mu-Tron Bi-Phase is a dual phase-shifter invented and marketed by Musictronics USA in the 70s. It has become well-known and well-loved for it’s ‘classic’ warm and deep sound, as well as the flexibility of it’s control and audio-processing capabilities. The Bi-Phase II seeks to accurately reproduce the sound and control layout of the original unit. The Bi-Phase II is all-analog and parts-accurate to the original, as much as is possible.

True-bypass foot-switching for each individual phase channel is built into the pedal. An expression pedal may be connected to the CV PEDAL socket at the rear of the Bi-Phase II. Alternatively, you can connect an external CV signal in the range of 0-5V for controlling the Bi-Phase II from a modular synth or modulation source. Either method – expression pedal or CV – allows controlling of LFO speeds and/or manual sweep of the phase sections.

Features and Improvements:

  • Modular optical design which allows for consistency across units.
  • True-bypass foot-switching for each individual phase channel is built into the pedal.
  • Original +-15  volt internal operations insures high headroom and low noise
  • 4 stage mode  with a fixed feedback allows for classic phase that works well with saturated signal
  • Square and sine wave operation
  • Control voltage assignable to rate to achieve “Leslie” fast and slow control
  • Control Voltage in and out allows for synchronized cascading of effects
  • LED (light emitting diode) indicators to show operating status of effects.
  • Routes signal from right to left to be more pedal board friendly.
  • Operates on standard  9v or 12 v DC (negative center tip, 250mA power port)
  • Same LFO synchronization and routing capabilities as the original


  • Feedback controls the level of phase feedback in 6 stage mode
  • Rate controls speed of phase in 4 and 6 stage modes
  • Depth controls intensity of phase effect
  • Shape selects square or sine wave
  • CV maybe assigned to rate, depth or none on either Phasor
  • CV out/thru to control more Bi-Phase II
  • Stage (4/6) determines 4 or 6 stages of phasing
  • LED rate  indicators


  • 2 1/4″ Input Jacks
  • 2 1/4″ Output Jacks
  • 9V-12V DC
  • Draws 260 mA
  • Weight: 1 lbs
  • Dimensions: 4.75″ x 2.5″ x 7.25″
  • 1 Year Limited Warranty
  • Made in the US
More Information
Price $644.00
Vendor Item Number BIPHASE2-VINTAGE
Special Order 1
Coming Qty 0
Manufacturer Mu-tron
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