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Art HD 131 manual

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Table of contents for the manual

  • Page 1

    HD131 SINGLE CHANNEL 31 BAND 1/3 OCTAVE GRAPHIC EQUALIZER HD215 DUAL CHANNEL 15 BAND 2/3 OCTAVE GRAPHIC EQUALIZER HD231 DUAL CHANNEL 31 BAND 1/3 OCTAVE GRAPHIC EQUALIZER[...]

  • Page 2

    2 IMPORTANT SAFETY INSTRUCTION – READ FIRST This symbol, whenever it appears, This symbol, wherever it appears, alerts you alerts you to the presence of uninsulated to important operating and maintenance dangerous voltage inside the enclosure-voltage instructions in the accompanying literature. that may be sufficient to constitute a risk of shock[...]

  • Page 3

    3 The new ART HD-Series of Precision Graphic Equalizers have been designed and engineered to exceed extremely high standards for audio performance and functionality. These innovative, high-qualit y equalizers are perfect for virtually any audio application where precision frequency tailoring, reliable performance, rug- ged design and extremely sile[...]

  • Page 4

    4 GENERAL INFORMATION Congratulations on the purchase of y our new ART equalizer. This profe ssional equalizer is perfect for virtually any audio application wher e frequency tailoring is needed. It’s features include: constant Q circuitry with accurate center frequencies, se lectable 6dB or 12dB range, active balanced and unbal- anced input/outp[...]

  • Page 5

    5 EUROBLOCK CONNECTIONS Insert the wires, and then snug down with the set screw. The entire barrier strip can be removed for quick service without disconnec ting the individual wires. SIGNAL LEVELS Signal levels from -10dBu to +4dBu are cons idered normal with maximum levels of approximately +22dBu balanced or +16dBu unbalanced. Do not connec t mic[...]

  • Page 6

    6 OPERATING INSTRUCTIONS Before starting to equalize your sound system there is some information you should know and proce- dures you should follow. Your equalizer is equipp ed with a bypass switch. The bypass switch, when activated, lights the bypass LED and cancels all equalization settings while allowing signal to flow directly through the unit [...]

  • Page 7

    7 FRONT PANEL CONTROLS 1. POWER SWITCH To turn the equalizer ON or OFF, press the upper or lower portion of this button. CAUTION: Always turn on your equalizer BEFORE your power amplifie rs are turned on, and always turn off your equal- izer AFTER your power amp lifiers have been turned off. 2. FILTER LEVEL CONTROLS Each of these sliders controls t[...]

  • Page 8

    8 Clip Indicator: - This red LED illuminates if any secti on of the equalizer is near clipping. Oc- casional flickering of this LED is acceptable, but if it remains on more than intermittently you should reduce the output level of the preceding equipm ent or, if that is not possible, turn down the equalizer’s level control to avoid audible distor[...]

  • Page 9

    9 REAR PANEL CONNECTORS & CONTROLS 8. POWER CORD This cord is used to connect the AC power source to your equalizer. CAUTION: Equipment for USA installation includes a power cord with a thre e pin polarized plug. DO NOT REMOVE THE CENTER GROUNDING PIN. 9. FUSE HOLDER This fuse holder contains the AC primary fuse. This fuse should be replaced wi[...]

  • Page 10

    10 11. INPUT/OUTPUT CONNECTORS 1/4 TRS The TRS (Tip Ring Sleeve) connector is balanced and wired as Tip = High (+), Ring = Low (-), and Sleeve = Ground. XLR The XLR input connector is balanced and wired as Pi n 2=High (+), Pin 3=Low (-), and Pin 1=Ground. EURO BLOCK HD131 HD 215, HD231 CAUTION: Only one input option should be chosen for audio conne[...]

  • Page 11

    11 APPLICATIONS Graphic equalizers may be used wherever modification of the frequency contour of a sound system is needed. A graphic equalizer is a solution to any number of sound problems or creative urges. T ypic al reinforcemen t applica tion of a two chann el equalizer Equal iz ati on of a m usical inst rument Equal iz ati on of an ef fects loo[...]

  • Page 12

    12 WARRANTY INFORMATION Limited Warranty Applied Research and Technology will provide warranty and service for this unit in accordance with the following warrants: Applied Research and Technology, (A R T) warrants to the original purchaser that this product and the components thereof will be fr ee from defects in workmanship and materials for a pe-[...]

  • Page 13

    13 SERVICE The following information is provided in the unlik ely event that your unit requires service. 1) Be sure that the unit is the cause of the problem. Check to make su re the unit has power supplied, all cables are connecte d correctly, and the cables them selves are in working condi- tion. 2) If you find the unit to be at fault, write dow [...]

  • Page 14

    14 SPECIFICATIONS: EQUALIZER Bands 2 x 15, 2/ 3 Octave, ISO Spacing (HD215) 1 x 31, 1/3 Octave, ISO Spacing (HD131) 2 x 31, 1/3 Octave, ISO Spacing (HD231) Type / Accuracy Constant Q, 3% Center Frequency Travel 20mm (Positive Center Detent) Range +/-6dB or +/-12dB (Selectable) Overall Gain Range Off to +6dB (Unbalanced out ) Sliders Centered Off to[...]

  • Page 15

    15[...]

  • Page 16

    16 APPLIED RESEARCH & TECHNOLOGY 215 TREMONT STREET ROCHESTER, NEW YORK 14608 USA (585) 436-2720 – Voice (585) 436-3942 – Fax www.artproaudio.com E-mail: cserve@artproaudio.com HD-SERIES Model HD131 - SINGLE CHANNEL 31 BAND 1/3 OCTAVE GRAPHIC EQUALIZER Model HD215 - DUAL CHANNEL 15 BAND 2/3 OCTAVE GRAPHIC EQUALIZER Model HD231 - DUAL CHANNE[...]