ART HQ231 Dual 31-Band Equalizer with Feedback Finder

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With LED indicators to illuminate the frequency with the most energy, the ART HQ231 equalizer helps you fight feedback and balance out the room fast.

This member of the HQ Series, HQ 231, features ART's FDC Feedback Detection Circuitry. The ART proprietary FDC differs from similar systems in that it is extremely fast. 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 HQ 231 utilizes a set of indicators that show which of the many EQ bands has the greatest energy. 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.

The unit also features constant Q circuitry, 45mm center detent sliders with selectable boost or cut range of 6dB or 12dB, balanced XLR, 1/4-inch and unbalanced RCA input and output connections, high and low pass filters, analog level metering, variable input controls, signal clip level indicators, read more ground lift switch, internal power supply and selectable line voltage. The rugged, all-steel chassis occupies 2U rack spaces and is intended for installation into standard 19-inch equipment racks.

Applications for the HQ-231 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.

Features:

- 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 chanel
- Center-detented frequency band sliders
- Independent level and bypass controls on each channel
- Relay bypass -- if power is lost, signal will still pass
- Occupies 2 rack spaces
- Variable input controls
- Signal clip level indicators
- Ground lift switch
- Internal power supply
- Selectable line voltage
read less

- Dimensions: 7.5" d x 19.0" w x 3.5" h
- Filter Type: Constant Q 3% center accuracy
- Frequency Bands: 2 x 31, 1/3 octave, ISO spacing
- Frequency Response: 20Hz 20kHz, +/- 0.5dB
- Output Noise: 94 dBm (unweighted)
- Input Impedance: 20K ohms typical
- Input/Output Connections: Active balanced XLR and 1/4" TRS, Unbalanced RCA
- Maximum Input Level: +22 dBm
- Maximum Output Level: +22 dBm
- Power (Switchable): 95-125 VAC, 50/60 Hz, 190-250 VAC, 50 Hz
- Range: +/-6dB or +/-12dB selectable
- Total Harmonic Distortion: .01% (20 Hz 20k Hz + 10 dBu )
- Weight: 12 lbs.

For support or warranty questions, please contact the manufacturer:
Phone: 716-297-2920
Web: https://www.artproaudio.com/support/

Reviewers gave this product an overall rating of 4 out of 5 stars. (23 ratings)
Submitted September 19, 2011 by a customer from comcast.net

"Know Your Situation"

Overall: 4 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
If I still traveled alot,I would upgrade.But this thing works well and didn't bust the budget.All things the same I would replace if fried or stolen.we play in rooms 300 people or less.
Sound
Quiet in XLR balanced .Have not used it any other way.
Features
No accessories.Best feature are the frequency lights on each channel and the +-6 and +-12 selector.
Ease of Use
Read the manual.it's easy
Quality
well built but not for pro road use.shock mounted maybe semi-pro.Weekenders absolutely good to go.
Value
They make a product,without an inflated retail price so they can sell it for half off and you think you're getting a deal.it's a 300.00 EQ thats worth every penny.you know your situation and if you need a 800.00 eq don't buy this one.if you need a good eq and don't have the tools to measure a room,get this one.
Manufacturer Support
These guys make good stuff.No problems with their product for years.
The Wow Factor
Sex appeal?you got to be kidding!technically its an EQ!!!!enough said.

Musical Background:

Sound Tech

Musical Style:

Bluegrass/Acoustic
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No longer available at zZounds

In most cases, a product is unavailable because it has been discontinued by the manufacturer