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Ashly GQX-1502 manual

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Table of contents for the manual

  • Page 1

    GQX-3102 GQX-3101 GQX-1502 Graphic Equalizer Operating Manual ASHL Y AUDIO INC. 847 Holt Road W ebster , NY 14580-9103 Phone: (716) 872-0010 T oll-Free: (800) 828-6308 Fax: (716) 872-0739 Internet: http://www .ashly .com/ Gain (dB) Ran ge Clip EQ HPF 6 - 15 In - Out In - Out 285 200 100 50 25 12 (Hz ) Ran ge Clip EQ HPF 6 - 15 In - Out In - Out 285[...]

  • Page 2

    2 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer T abl e Of Contents 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 UNP ACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 3

    3 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 1. INTRODUCTION Congratulations on your purchase of an Ashly GQX series graphic equalizer . The GQX series equalizers are a second generation design including many refinements on our original GQ models. Lower noise and distortion, greater accuracy , and additional output option[...]

  • Page 4

    4 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer Inpu ts (P arallel) Outputs (Pa ra llel) (-) (+) (-) (+) Inpu t is active b ala nced. Out put i s act iv e serv o- bal a n ced. If u nbalanced connection is used be sure to ground unus ed p ath. Maximum in/ ou t level is +22dBu . (-) (+) 2 3 1 PUSH 3. AUDIO CONNECTORS AND CABLE[...]

  • Page 5

    5 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 120 VAC 50-60 Hz. 24 W at t s Ash ly Au di o In c. Ro c h es t er, NY Ma de I n U S A Model GQX-3 101 1/2 Am p CAUT ION: Disconnect pow er cord before repla c ing fuse Debran c her avant d 'ouvr ir ATT E N TION: TO REDUCE THE RISK OF ELE CTRIC SHOCK DO NOT RE MOVE CO VER. [...]

  • Page 6

    6 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 20 25 31.5 40 50 63 80 100 125 160 200 250 315 400 500 GQ X S e r ie s Model 3101 Third Octave Graphic Equal izer Power 5. CONTROLS 5.1 Gain The gain control adjusts the overall gain of the equalizer when the EQ switch is “in”. It is generally used to compensate for level c[...]

  • Page 7

    7 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer Range Output Lev el 5K 8K 10K 12.5K 16K 20K 6.3K Gai n +15(+6) +10 +5 0 -5 -10 -15( -6) (dB) Cli p EQ HPF +6 +3 0 -3 -6 -9 -12 -15 -18 -21 VU 6 - 1 5 In - Out In - Out 285 200 100 50 25 12 (Hz) +6 +4 +2 0 -3 -9 - V ery low bass (the “wind” in a kick drum, al- most felt as m[...]

  • Page 8

    8 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer - + OUT IN Figur e 7.1: Passive RLC Filter Design Figur e 7.3: W ein-Bridge Filter Design 7 . DESIGN THEOR Y While most graphic equalizers look very much the same, there are several important dif ferences in the cir- cuitry used to implement various designs. Perhaps the major d[...]

  • Page 9

    9 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer In designing a graphic equalizer , a selection of filter sharpness must be made. More sharpness (higher Q) produces less filter overlap and tighter control over an individual band, but also causes “ripple” in the frequency response when many filters are boost or cut togethe[...]

  • Page 10

    10 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 8. TROUBLESHOOTING TIPS 8.1 No Audio Output Check AC power - is the pilot light on? Check in/out connections - are they reversed? Are you sure you have an input signal? 8.2 EQ Controls Do Nothing Is the master EQ switch in? The lowest and highest frequency sliders may be beyon[...]

  • Page 11

    11 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 10. SPECIFICA TIONS Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GQX1502 . . . . . . . . . . . . . . . . . . GQX3101/3102 Input T yp e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Active Balanced . . . . . . . . .[...]

  • Page 12

    12 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer Figur e 12.2: GQX 1502 Block Diagram 12. SCHEMA TICS[...]

  • Page 13

    13 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer Figure 12.2: GQX 1502 Schematic Diagram[...]

  • Page 14

    14 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer Figur e 12.1: GQX 3102, GQX 3101 Block Diagram[...]

  • Page 15

    15 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer Figur e 12.1: GQX 3102, GQX 3101 Schematic Diagram[...]

  • Page 16

    Printed in USA 1/97 GQX Rev 2 Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer ASHL Y AUDIO INC. 847 Holt Road W ebster , NY 14580-9103 Phone: (716) 872-0010 Fax: (716) 872-0739 T oll Free (800) 828-6308 Internet: http://www .ashly .com/  1997 by Ashly Audio Corporation. All rights reser ved worldwide.[...]