Audient ASP231 - Dual Channel Graphic Equalizer

Audient ASP231 - Dual Channel Graphic Equalizer
Audient ASP231 - Dual Channel Graphic Equalizer Audient ASP231 - Dual Channel Graphic Equalizer
Price: $750.00
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Product Code: ASP231
Availability: In Stock


The ASP231 from Audient is a dual channel, 31-band graphic equalizer with individual multiple feedback constant Q filters at ISO-standard third-octave frequencies. The output stage can drive very large amounts of current into the difficult loads often presented by long cable runs and paralleled loads, while the optimized balanced input stage provides superb rejection of unwanted signals in real world conditions.

The unit can operate in two modes. "Normal" mode, best suited for general EQ treatment and system correction provides reciprocal constant Q responses with smooth combining characteristics at all gain settings. "Narrow" mode provides a much sharper cut response, which allows removal of feedback with minimal loss of program material. Since overall system treatment may still be required in "Narrow" mode, the boost controls still operate with normal bandwidth.

To make compensation for audience absorption and humidity changes, the ASP231 feature a "Tilt" control that tilts the overall system response gently around the 1kHz mark, either boosting high-frequency and cutting low frequency, or vice versa. Center frequencies and operational controls are back-lit to enhance functionality in darker environments and long throw fluid damped 45mm centre detented precision faders provide a smooth response when operated.

  • 31-band graphic EQ with Multiple Feedback Bandpass filter topology for enhanced sonic performance
  • Dual mode operation - conventional reciprocal boost and cut or conventional boost with high Q "notch" cut
  • +/-10dB system gain adjustment
  • Long throw fluid damped 45mm centre detented precision faders
  • Continuously variable hi-pass filter
  • "Tilt" control for rapid overall system response adjustment, for audience/humidity compensation for example
  • Back-lit system overload indication and centre frequency display
  • Back-lit system status display
  • Automatic power fail bypass


Filter Type

Graphic, Constant Q

Number of Channels



2 x XLR
Phoenix termination


2 x XLR
Phoenix termination

Maximum Input Level


Frequency Bands

2 x 31


1/3 octave

Range (Boost/Cut)


Maximum Output Level

22dBu into 600Ω loads

Frequency Response

10Hz to 22kHz, +/-0.3dB

Dynamic Range

Not specified by manufacturer


<-92dBu, 20Hz to 22kHz

Dimensions (WxDxH)

19" x 9 3/16" x 5 1/2" (482 x 233 x 132 mm)


13. 7 lbs (6.2 kg)


12dB/octave Butterworth hi-pass filter, sweepable from 15Hz to 250Hz