The newest member of the HQ SERIES: HQ 231. features ART’s FDC™ Feedback Detection Circuitry. The A R T 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, ¼” and unbalanced RCA input and output connections, high and low pass filters, analog level metering, variable input controls, signal clip level indicators, 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” 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

Specifications

Graphic Equalizers Series Overview

The XL231 delivers extremely precise, powerfully flexible and simply great sounding equalization with the quality features and reliable design criteria necessary for top-level audio performance. This innovative, high-quality equalizer is perfect for virtually any audio application where precision frequency tailoring, reliable performance, rugged design and extremely silent processing are of the utmost priority.

Applied Research and Technology introduces the new HD SERIES of professional Equalizers. Every EQ in the ART HD SERIES has been designed and engineered to exceed extremely high standards for design specification and audio performance.

HQ SERIES: with FDC™ Feedback Detection Circuit.
The HQ SERIES of professional graphic equalizers represents our commitment to producing high-quality equalizers. Our HQ SERIES has proprietary features that help you keep live sound under control. They are incredibly powerful tools for front-of-house and monitor mixes alike. FDC™ instantly illuminates the EQ band with the hottest signal to identify feedback, for quick correction. Use FDC™ to observe peak frequencies or to quickly locate dominant room frequencies during system setup. The HQ-231, HQ-31 and HQ-15 can handily double as simple spectrum analyzers. Make your live mixes sound their best with HQ SERIES EQs from ART.

>300 SERIES.> ART’s 341, 351 and 355 graphic equalizers are designed for pro use wherever you need a cost effective way to shape your sound. The rugged, all steel constructed chassis make them well suited for any live sound application.