ART HQ231 Dual 31 Band Equalizer

ART HQ231 Dual 31 Band Equalizer

Brand:| Model: HQ231
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.
  • FDC™ feedback detection circuit
  • Dual channel 31-band graphic equalizer
  • Output level VU metering on each channel
  • Constant-Q filtering
  • Individual high and low pass filters on each channel
  • Center-detented frequency band sliders
  • Independent level and bypass controls on each channel
Part # 
Weight: 13.5 lbs.  
Ships in 7-10 Business Days
List Price$539.00
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Part # 245-8630
Qty:  EA
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Product Details

ART HQ231 Dual 31 Band Equalizer

The HQ231 Dual 31-band Graphic EQ is perfect for any live sound application where there is a high feedback potential including monitor mixes, side-fill cabinets or high powered front-of-house mixes situations.

The HQ231 features ART’s proprietary FDC™ (Feedback Detection Circuit), with constant Q circuitry capable of delivering a 3% center frequency accuracy. Professional features like LED level metering, selectable 6 dB or 12 dB slider range, active balanced and unbalanced input & output connectors, RFI filters, independent variable Hi Pass (low cut) and Low Pass (high cut) filters, variable input level control, passive bypass switch, clip level indicator, ground lift switch, and selectable line voltage switch make it ideal for any professional application or touring system.

FDC Feedback Detection Circuit
FDC (Feedback Detection Circuitry – designed and developed by ART Engineering) instantly illuminates an LED on the corresponding EQ band fader with the greatest sustained signal. The LED indicators can immediately show which band corresponds to the feedback frequency, allowing the sound engineer to reduce gain in that band to quickly kill the feedback while having a minimal impact on the sound of the live program material.

The FDC also acts as a simple spectrum viewer while the concert proceeds showing where the "hot" areas are. During system setup and sound check, the FDC may be used to help identify room and sound system resonances. By increasing the gain until feedback, it is easy to identify those frequencies that are likely to be problems. Reducing the gain in these bands helps tune the sound system, and, remove problem areas before the show begins. It also helps increase the gain margin before feedback.

Constant-Q Filtering
The HQ231 features Constant-Q Filtering, which helps the HQ's FDC work with greater efficiency while offering superior overall performance of the EQ. Constant-Q ensures that even when making radical adjustments to a frequency band, that adjacent bands will not be affected. This is particularly critical in professional applications including monitor mixes and feedback control.

Professional Feature Set
Professional features like 45 mm center detent sliders with selectable boost or cut range of 6 dB or 12 dB ensures the HQ231 can be used for radical tone shaping, or precise control of a sound system. Versatile connection to any live sound system or installation can be easily made using balanced XLR, 1/4" TRS and unbalanced RCA input and output jacks included on the HQ231 back panel.

High and low pass filters, analog level metering, variable input level controls, signal clip level indicators, ground lift switch, internal power supply and selectable line voltage complete the HQ231 Dual 31-Band Graphic EQ's full feature set.

Specifications: • Frequency response: 20 Hz to 20 kHz, ±0.5 dB • Frequency bands: Two x 31, 1/3 octave, ISO spacing • Filter type: Constant X -3% center accuracy • Indicators: Output noise -94 dB (unweighted) • Input impedance: 20k ohms typical • Input/output connections: Active balanced XLR and 1/4" TRS, unbalanced RCA • Max input level: +22 dBm • Max output level: +22 dBm • Power (switchable): 95 - 125 VAC 50/60 Hz, 190-250 VAC 50 Hz • THD: 0.01% • Dimensions: 7.5" D x 19" W x 3.5" H • Weight: 12 lbs.

ART HQ231 Dual 31 Band Equalizer
  • BrandART
  • ModelHQ231
  • Part Number245-8630
  • UPC840402011637
  • Product CategoryEqualizers
  • Unit of MeasureEA
  • Weight13.5 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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ART HQ231 Dual 31 Band Equalizer

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ART HQ231 Dual 31 Band Equalizer

I am looking for ways to tame a mid/tweeter that is a little shrill in the upper mid frequencies

The mid/tweeter is a Tang Band model w2-852sh and I've crossed it over at 2500hz, don't know if this has anything to do with it. I suspect that lower crossover frequency may help given that it's really a fullrange driver. Open to all possible solutions.
Asked by: Johnny123
This speaker will handle a crossover as low as about 200 Hz so you could always try a different crossover point. The breakup frequency is in the upper registers however, this is usually tamed with an EQ like the one in question or a contour filter of some kind.
Answered by: MattP
Date published: 2013-03-12
  • 2015-06-03T09:26CST
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