Expert Sleepers Beatrix

Phaser for voltage control on notch frequencies, effect depth and feedback

 185,00 ( 151,64 + VAT)

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  • 100% analogue
  • Frequency CV input with attenuator
  • Manual controls for Frequency, Feedback, Depth and input level
  • Switches for Phase and Sum
  • CV inputs for Offset, Depth and Feedback

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SKU: 56479 Categories: , ,
SKU: 56479
SKU: 56479 Categories: , ,
SKU: 56479

Expert Sleepers Beatrix

Phaser for voltage control on notch frequencies, effect depth and feedback

Beatrix’ is a phaser, offering voltage control over notch frequencies, effect depth and feedback (resonance). It also offers an unusual ‘offset’ control allowing you to sweep the filter notches without sweeping the resonant frequency.

Further options are provided by the ‘phase’ switch (which disables the phasing sound and essentially turns the module into a resonant peak filter) and ‘sum’ switch (which inverts the filtered signal, giving a different flavour of phasing).

Beatrix will self-oscillate at high feedback if desired, though the front panel control is factory-trimmed to stop just short of self-oscillation.

The module is 100% analogue, using discrete transistor OTAs.


  • Panel width: 8HP
  • Module depth: 37mm
  • Current draw: 22mA on the +12V rail, 21mA on the -12V rail
  • Inputs:
    • Frequency (approximately 1V/octave, with attenuator)
    • Offset
    • Depth
    • Feedback
    • Audio input (with attenuator)
  • Outputs:
    • Audio output

37 mm



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Return and restocking option is available for private customers only. We will issue a refund/credit if you are not satisfied with your purchase and notify us within 10 days of product receipt. It must be returned in the original packaging and in saleable condition and must be returned freight prepaid. Return and restocking rights are not applicable for Audio/Video and software products. Shipping and handling charges to and from are not refundable.

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