ART HQ-231

Dual 31-Band Equalizer with Feedback Detection Circuit
ART HQ-231 image 1
ART HQ-231 image 1
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ART HQ-231
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High-Quality, Affordable EQ!

The ART HQ-231 Dual 31-Band EQ features ART 's proprietary FDC (Feedback Detection Circuit) found exclusively in ART equalizers. FDC shows you exactly where feedback is occurring - quickly and precisely - making the proper attenuation of offending frequencies fast and easy.

Professional quality features , functionality and a new low-noise design make the HQ-231 an outstanding equalizer. The HQ-231 has Constant-Q filtering with ISO centers, independent variable highpass and lowpass filters, L E D - illuminated detented slide potentiometers, switchable +/- 6db or +/-12db boost/cut ra n g e, independent level a nd bypass controls, and EQ output LED metering.

The HQ-231 is extremely useful for equalization and feedback elimination in a wide variety of situations, including live sound reinforcement, monitor mixes, nightclub and DJ applications, churches , restaurants and many more environments where precision equalization and feedback detection is essential.

  • Low Noise - High Performance Circuitry
  • Dual 31-Band EQ
  • FDC Feedback Detection Circuit
  • Constant - Q filtering with ISO Centers
  • LED Illuminated Detented Sliders
  • Switchable Power Line Voltage
  • 2U Rack Spaces
  • Independent Variable High-Pass and Low-Pass Filters
  • Switchable +/- 6db or +/-12db Boost /Cut Range
  • Independent Level and Bypass Controls
  • Equalizer Output LED Metering

Additional Media

HQ-231 Spec Sheet
HQ-231 User Manual
Signal Processing Buying Guide

Tech Specs

Number of Bands 2 x 31-band
Q Type Constant
Boost/Cut Range ±6dB, ±12dB (Switchable)
Low Cut Filter Variable
High Cut Filter Variable
Faders Throw 45mm
Rack Spaces 2U
Height 3.5"
Depth 7.5"
Width 19"
Weight 12 lbs.
Manufacturer Part Number HQ-231

Customer Reviews

Based on 5 reviews
Write your review

ART HQ-231

This EQ was everything I hoped it would be and more. I have QSC K12's for my PA at home in a pretty small space. Feedback was a huge issue for me. I have fedback detection on my dbx driverack pa but that is a little difficult to use and although it helped it was I felt taking too much of the frequency range out. The HQ-231 does exactly what it says it would do by telling you the problem frequencies and allowing you to manually adjust it. WOW!!! Tons more game and clarity like never before.And the lights are cool too.Yuk Yuk.
Music background: Drummer, Home recording

Extremely Fine Precision

I am just an amateur listener of music with an entry level audiophile setup. This was a replacement for a low end dual 14-band BSR programmable unit. I thought it worked fine over the years and really enjoyed the programmable aspect (which I still miss) but the ART is on a completely different level. There is detail coming through that I had never heard in some recordings. I find it somewhat annoying because I now feel a need to re-listen to my entire music collection, which is substantial. The detail has some to do with the increase in bands but I think it is more the accuracy and clarity of the device. The precision of each band is impressive, especially for the price. I am overjoyed with this purchase. I would also like to point out the service of Sweetwater. I have worked in customer service for 12 years and Sweetwater is easily the finest group I have dealt with in the last 20. The packaging was impressive and their follow-up for such a small purchase was unmatched.
Music background: None

Dual 31-Band Equalizer with Feedback Detection Circuit

thanks guys its awesome

A great EQ!

After using this, I'm not sure how or why I ever got along without it. I can find the resonant frequencies in the room before starting the music, and feedback problems are eliminated without discoloring the sound. Easy and powerful. Visual info is always welcome to me, and I can easily see the hottest frequency. The only thing I would change is the 'Low pass/Hi cut' filter, which is counter-intuitive at first glance. Turning it clockwise turns it off, while other knobs go the usual way.
Music background: Gigging musician and sound engineer.

Art HQ-231

Great looking and easy to use especially in the dark. It has been a great addition to my rack. Great bang for the buck and I woould recommend it.
Music background: Live Sound Engineer
See also: Feedback Eliminators, ART, ART Feedback Reduction, ART Graphic EQ, ART Feedback Reduction, ART Graphic EQ