ELECTRO-ACOUSTIC Ear Model 41 Steiner 4P Filter

Filter collaboration between Peter Grenader and Nyle Steiner generating a wide range of distortion sounds
MFR# Model 41
ELECTRO-ACOUSTIC Ear Model 41 Steiner 4P Filter
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Special Order
Note: This item may not be returnable or could require a restocking fee. Contact one of our Audio Consultants for more details. Due to the special nature of this item, we order each unit fresh from the factory, exclusively for you! Lead times may vary so please chat, call or email for up-to-date inventory status.

The ELECTRO-ACOUSTIC Ear Model 41 Steiner 4P Filter is the net result of this old and new technology pairing has produced a split personality which duplicates all the grit of the original design taken to levels of distortion and deformity never before possible in a Steiner core.

In June of 1992, Nyle Steiner designed an updated version of the filter found in his SynthaSystem, a revision that was never fully completed, and intended for his EVI. In the fall of 2008 the Model 41 began as a joint effort with Nyle Steiner based on this design and slated as a limited edition module to celebrate the 5 year anniversary of Plan B. As with other modules planned for that year, the M41 was never released.

In Jan of 2014 the collaboration resumed with a few design additions suggested to him: IFM SYNC (the ‘twin’ function found in the M11), a HYPER Q Regeneration function, a ± bipolar VC input, VC resonance and level independent lowpass, bandpass and high-pass operation, along with all benchmarks true to the original EVI Filter design including a variable intensity control (Spectral Energy Distribution), a four pole 18-stage diode ladder for 24 dB/oct response, output oscillation bandwidth of 0.5 hZ to 16 kHz suitable for LFO or VCO applications, user-scalable 1VOLT/OCT tracking, and full incorporation of integrated verses discrete transistor amplification architecture.


  • Frequency manual control (range 0.5 Hz - 15 kHz)
  • Bipolar (±) Frequency modulation on input attenuator
  • Filter Resonance manual control
  • Frequency modulation voltage control on input 2
  • Frequency modulation input 2 Std attenuator - 1v/oct manual adjust
  • Filter Resonance Voltage Control Input
  • IFM Sync Frequency Modulation mode
  • Spectral Energy Distribution Enable
  • Spectral Energy Distribution control
  • Hyper Q Resonance Modulation mode
  • Hyper Q Resonance Modulation polarity (±)
  • Output Mode Level Attenuators (Lowpass, Band Pass, Highpass)

Additional Information

Condition New
Depth 28 mm
Chassis Module
Module Type Eurorack
Module Slot Count 14hp
Connector Type 3.5 mm
Power Consumption 60 mA +12 V / 15 mA -12 V
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