ART HQ231 Dual Channel 31-Band Equalizer

ART HQ231 - Dual Channel 31-Band Equalizer with 20mm Faders, Feedback Detection Circuitry, LED Energy Indicators, XLR, 1/4" TRS Balanced and RCA Unbalanced Inputs/Outputs

ART HQ231 - Dual Channel 31-Band Equalizer with 20mm Faders, Feedback Detection Circuitry, LED Energy Indicators, XLR, 1/4" TRS Balanced and RCA Unbalanced Inputs/Outputs

B&H # ARHQ231 MFR # HQ-231
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ART HQ-231 overview

  • 1Description

The HQ231 from ART is a dual channel, 31 band graphic equalizer that features FDC (Feedback Detection Circuitry.) The unit also features constant Q circuitry, 45mm center detent sliders with selectable boost or cut range of 6dB or 12dB and connectivity includes XLR, 1/4" and unbalanced RCA input and output connections.

The ART proprietary FDC differs from similar systems in that it is extremely fast and utilizes a set of indicators that show which of the many EQ bands has the greatest energy. Although it illuminates the band with the greatest energy with the brightest LED, it doesn't fully discriminate between bands and will not get "stuck" on one band when there is no signal. The function can also act as a simple spectrum viewer.

The rugged, all-steel chassis occupies 2U rack spaces and is intended for installation into standard 19" equipment racks. Applications for the HQ231 include live sound systems/PA, permanent or fixed installations, church, club and practice PA systems, DJ sound systems, home and project recording systems, and monitor systems.

Dual channel, 31-band graphic equalizer
Constant-Q filtering
FDC Feedback Detection Circuit
Individual high and low pass filters on each channel
Center-detented, 20mm frequency band sliders with selectable range
Independent level and bypass controls on each channel
Relay bypass - in the event of power loss to the equalizer, signal will still pass
Signal clip level indicators
Ground lift switch
Internal power supply with selectable line voltage
UPC: 840402011637
In the Box
ART HQ231 - Dual Channel 31-Band Equalizer with 20mm Faders, Feedback Detection Circuitry, LED Energy Indicators, XLR, 1/4" TRS Balanced and RCA Unbalanced Inputs/Outputs
  • AC Power Cable
  • Three (3) Year Warranty
  • Table of Contents
    • 1Description

    ART HQ-231 specs

    Filter Type Constant - 3% center accuracy
    Number of Channels Two
    Inputs 2 x XLR
    2 x 1/4" TRS phone
    2 x RCA phono
    Outputs 2 x XLR
    2 x 1/4" TRS phone
    2 x RCA phono
    Maximum Input Level +22dBm
    Frequency Bands 2 x 31
    Bandwidth 1/3 octave, ISO spacing
    Range (Boost/Cut) +/-6dB o+/-12dB, selectable
    Maximum Output Level +22dBm
    Frequency Response 20Hz to 20kHz, +/-0.5dB
    Dynamic Range Not specified by manufacturer
    Noise -94dBm, unweighted
    Dimensions (WxDxH) 19" x 7 1/2" x 3 1/2"
    Weight 12 lbs
    Specialties FDC (Feedback Detection Circuitry) instantly illuminates the EQ band with the greatest signal.
    Packaging Info
    Package Weight 13.75 lb
    Box Dimensions (LxWxH) 20.0 x 11.0 x 6.0"

    ART HQ-231 reviews

    HQ231 Dual Channel 31-Band Equalizer is rated 4.9 out of 5 by 7.
    Rated 5 out of 5 by from Also great for home audio I bought this for my rackmount home stereo system. Having both balanced (XLR,TRS) and unbalanced (RCA) connectors made it easy to connect. The +/-12dB gain controls in 31 bands were more than enough to flatten the room response. The 1/3 octave controls really help in smoothing out any sharp notches/peaks. The FDC is actually quite impressive. It acts as a real-time audio spectrum analyzer in that it instantly shows where (at what frequencies) all the power is going. With no signal, the LEDs are all lit normally. As the signal increases, so does the brightness of the appropriate LEDs, but as the signal gets even greater, the unaffected LEDs then begin to dim. A peak signal results in only a few very bright LEDs. Very effective. My only complaint is that the FDC cannot be turned off. The visual effect can be so mesmerizing that it actually becomes a distraction during social gatherings!
    Date published: 2009-03-03
    Rated 5 out of 5 by from Very cool EQ. Glad I bought it. I use the HQ 231 for live sound. I do shows where musicians are playing acoustic instruments using mics and DIs. Mainly I've used the HQ231 to EQ the monitor mixes. I never have feedback problems because the feedback circuit shows if a frequency is really hot and about to feed back. The HI and LOW shelving EQs also are great for dialing in the right frequency for making the HI & Low cuts.
    Date published: 2011-10-26
    Rated 4 out of 5 by from Graphic equalizer with FDC I purchased this ART HQ231 for Church's sound system to go with two new Shure MX-418 micphones. With the equalizer, the gains on the mixer can be increased and find the frequency bands that caused feedback easily. Once reduce the gain of frequency, the feedback was cut off effectively.
    Date published: 2016-08-29
    Rated 5 out of 5 by from Like a Ferrari It's like a Ferrari, looks beautiful and performs great! You have great flexibility from the 31 bands. There is also the flexibility of balanced or unbalance audio. Great product!
    Date published: 2009-06-26
    Rated 5 out of 5 by from Feed me! When I first turned this on, I thought it was defective. Then I moved the sliders up from the zero position and it started to come alive and the sound quality improved constantly over and above what I ever expected. It is a good buy and I am extremely happy with it.
    Date published: 2008-06-11
    Rated 5 out of 5 by from works great using it on a home stereo. works great and looks cool too.
    Date published: 2012-01-29
    Rated 5 out of 5 by from great eq works great and looks cool to.
    Date published: 2012-02-08
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