Art HQ 231 User manual

From the innovative minds at ART.
From the innovative minds at ART.
HQ231 FEATURES:
✔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
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
high-pass and low-pass filters, LED-illuminated
detented slide potentiometers,switchable +/-6db
or +/-12db boost/cut range,independentleveland
bypass controls, and EQ outputLED metering.
During operation, various EQ band LED’s will
illuminate as the HQ-231 processes a signal. The
loudest band will correspond with the brightest
LED.When feedbackoccurs,FDC (and it’sbrightest
LED) shows you exactly where to attenuate – it’s
that simple! You’ll also know you have properly
attenuated the signal as the LED reduces it’s
illumination.
The HQ-231 EQ circuitry is extremely precise,and
the Constant-Q filtering helps the HQ’s FDC work
with great efficiency. When feedback occurs at a
certain band, the ensuing attenuation will not
affect surrounding bands. This precision is, of
course, absolutely critical for professional
applications and situations where top audio
performance is a requirement.
Additionally, FDC enables you to observe those
frequency bands with the greatest energy when
program material is being played, and can help
to quickly locate dominant room modes during
system setup.
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 environ-
ments whereprecision equalization and feedback
detection is essential.
DUAL 31-BAND GRAPHIC EQUALIZER
WITH FDC™FEEDBACK DETECTION CIRCUIT
HQ-231
Applied Research & Technology •215 Tremont St., Rochester, NY 14608 •USA •585.436.2720 tel •585.436.3942 fax •www.artproaudio.com

From the innovative minds at ART.
From the innovative minds at ART.
HQ-231
APPLICATIONS:
✔Professional, Home
and Project Recording
Studios
✔Live Sound Systems
✔PA Systems
Permanent/Fixed
Installs
✔Churches and
Concert Halls
✔Nightclubs and Practice
PA systems
✔DJ and Karaoke Sound
Systems
✔Monitoring Systems
Dimensions 7.5” d x 19.0” w x 3.5” h
Weight 12 lbs.
Frequency Bands 2x31, 1/3 octave, ISO spacing
Filter Type Constant Q –3% center accuracy
Range +/–6dB or +/–12dB selectable
Frequency Response 20Hz– 20kHz, +/–0.5dB
Output Noise –94dBm (unweighted)
THD + Noise .01% (20Hz–20kHz+10dBu)
Input/Output Connections Active balanced XLR and 1/4” TRS
Unbalanced RCA
Maximum Input Level +22dBm
Maximum Output Level +22dBm
Input Impedance 20K ohms typical
Power (Switchable) 95–125VAC, 50/60Hz
190–250VAC, 50Hz
Applied Research & Technology •215 Tremont St., Rochester, NY 14608 •USA •585.436.2720 tel •585.436.3942 fax •www.artproaudio.com
Features and specifications subject to change without notice. ©2002 Applied Research andTechnology ART-HQ231-Specs-0902
HQ-231
DUAL 31-BAND GRAPHIC EQUALIZER WITH FDC™
Date:
ART Representative:
Notes:
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