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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. ©2005 Applied Research and Technology ART-HDSERIES-Specs-0704
Celebrating Twenty Years of Audio.
Features:
✔ Accurate Constant Q Precision
Center Frequencies
✔ Exceptional Frequency Response
at 20-20KHz, +/-0.5dB
✔ Equipped with XLR, 1/4” Phone
and Euroblock Barrier Strip
Connectors
✔ Independent Variable Hi
and Low Pass Filtering
deliver optimum control
✔ Automatic Bypass Relays provided
in case power is lost to the unit
✔ Extremely Quiet Operation housed
inside a Rugged Chassis Design
Specifications:
Type / Accuracy Constant Q, 3% Center Frequency
Travel 20mm (Positive Center Detent)
Range +/-6dB or +/-12dB (Selectable)
Overall Gain Range Off to +6dB (Unbal. out) Sliders Centered
Off to +12dB (Bal. out) Sliders Centered
INPUTS
Type Active Balanced/Unbalanced
Connectors 3-Pin XLR, 1/4” TRS (Bal.), Euroblock
Impedance 24k Ohms (Balanced); 12k Ohms (Unbal.)
Maximum Level +22dBm (Level Control at Center)
OUTPUTS
Type Active Balanced / Unbalanced
Connectors 3-Pin XLR, 1/4” TRS (Balanced),
Euroblock
Impedance Typical <150 Ohms
Maximum Level +22dBm (Balanced) (600 Ohm load)
+16dBm (Unbalanced) (2k Ohm load)
RFI filters Yes
Bypass Switches Yes, Passive
Overload LED Threshold 6 dB below clipping, (all filters set to flat)
High Pass Filter 10-250Hz, 12dB/Oct
Low Pass Filter 3k-40kHz, 12dB/Oct
Frequency Response 20-20kHz, +/-0.5dB
THD + Noise less than 0.01% (20Hz-20KHz, 0dBu)
IM Distortion (SMPTE) 0.005%
Signal to Noise Ratio greater than 98dB, Ref: 0dBu, (Bal.)
HD215 greater than 95dB, Ref: 0dBu,
(Bal.) HD131/231 20Hz - 20KHz, unweighted.
Headroom +22dB, Ref, 0dBu, (Balanced)
(+/-6dB and +/-12dB range)
Dynamic Range greater than 120dB, (Bal.) HD215
greater than 117dB, (Bal.) HD131/231
Channel Separation greater than 60dB
Common Mode Rejection 50dB typical
POWER
Line Voltage 95-125VAC, 50/60Hz, 190-250VAC, 50/60 Hz
Input AC Power 9 Watts (HD131 / HD215),
14Watts (HD231), typical
Construction All Steel Chassis, Aluminum Front Panel
Sizes 1.75”H x 19”W x 7.0”D (HD131/ HD215)
4.45cm x 48.3cm x 17.8cm
3.5”H x 19”W x 7.0”D (HD231)
8.9cm x 48.3cm x 17.8cm
Weight 7.5 Ibs (3.4 kg). (HD131 / HD215)
12 Ibs (5.4 kg). (HD231
High Definition Graphic Equalizers
Applications:
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.
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