GQX-3102 GQX-3101 GQX-1502 Graphic Equalizer Operating Manual Channel 1 Clip VU +15 (+6) +6 +10 +4 0 0 -5 -3 -10 -9 -15 (-6) 20 25 31.5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.25K 1.6K 2K 2.5K 3.15K 4K 5K 6.3K 8K 10K 12.
Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer Table Of Contents 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 AUDIO CONNECTORS AND CABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 Inputs . . . . . . . . . . . . . . . . . . . . . . .
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 options are the result. We continue using “Q” enhanced Wein bridge filters and interleaved summing for constant “Q”, low ripple, and minimum filter interaction.
Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer Input is active balanced. Output is active servo-balanced. If unbalanced connection is used be sure to ground unused path. Maximum in/out level is +22dBu. PUSH 3 2 1 (+) (-) (-) (+) (-) (+) Inputs (Parallel) 3. Outputs (Parallel) AUDIO CONNECTORS AND CABLES Your GQX series equalizer is provided with three different connector types.
Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 120 VAC 50-60 Hz. 24 Watts Ashly Audio Inc. Rochester, NY Made In USA Model GQX-3101 1/2 Amp CAUTION: Disconnect power cord before replacing fuse ATTENTION: TO REDUCE THE RI SK OF ELECTRIC SHOCK DO NOT REMOV E COV ER. NO USER SERVI CEABLE PARTS IN SIDE. REFER SERVICING TO QUALIFI ED SERVICE PERSON N EL. TO REDUCE THE RI SK OF FIRE REPLACE ONLY WITH SAME TYPE FUSE.
Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer GQX Series Model 3101 Third Octave Graphic Equalizer 20 25 31.5 40 50 63 80 100 125 160 200 250 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 changes due to the equalization process, but can also allow the equalizer to adjust overall system level and gain structure.
Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer Clip VU +15(+6) +6 +10 +4 +5 +2 +6 Range +3 6 - 15 0 -3 -9 -5 -3 -10 -9 In - Out HPF In - Out -6 0 0 EQ -12 50 -18 -15(-6) 5K 6.3K 8K 10K 12.5K 16K 20K - 25 200 -21 Gain (dB) Very low bass (the “wind” in a kick drum, almost felt as much as heard -40Hz-80Hz.
Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 7. DESIGN THEORY While most graphic equalizers look very much the same, there are several important differences in the circuitry used to implement various designs. C Perhaps the major differences are in the filters. Some equalizers use a filter made of a capacitor, an inductor, and a resistor, or “RLC” filter. The advantage here is simplicity, but the real disadvantage is the inductor itself.
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 together to produce a flat response.
Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 8.5 Excessive Hum or Noise Hum will usually be caused by a ground loop between components. Try using the suggested balanced input and output hook-ups if the other pieces of equipment used in conjunction with your equalizer have balanced inputs and outputs. 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.
Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer 10. SPECIFICATIONS Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GQX1502 . . . . . . . . . . . . . . . . . . GQX3101/3102 Input Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Max. Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connectors . . . . . . . . . . . . . . . . . . .
Figure 12.2: GQX 1502 Block Diagram 12.
Figure 12.
Figure 12.
Figure 12.
Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103 Phone: (716) 872-0010 Fax: (716) 872-0739 Toll Free (800) 828-6308 Internet: http://www.ashly.com/ 1997 by Ashly Audio Corporation. All rights reserved worldwide.