Applied Research and Technology (ART) HD131, HD-215, HD-231 Specification

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.