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
(-) (+)
Inputs (Parallel)
3
2 1
(+) (-) 
(-) (+)
Outputs (Parallel)
3.AUDIO CONNECTORS AND CABLES
Your GQX series equalizer is provided with three different connector types. 1/4 inch stereo phone jacks, three pin XLR type connectors, and a terminal strip will allow interfacing to most professional audio products. Inputs as well as servo-balanced outputs can be used bal- anced or unbalanced. When possible, we recommend bal- anced connections between all components in your system, as this eliminates ground-loop induced hum and noise.
3.1Inputs
If inputs are used unbalanced, the signal should be on the (+) connection and the (-) connection must be tied to ground. A mono phone plug used as an unbalanced connection will automatically ground the ring of the jack which is the (-) connection. When using a stereo plug,
XLR connector, or terminal strip for an unbalanced sig- nal, the (-) input connection MUST be tied to ground, or loss of signal level may result.
3.2Servo-Balanced Output
The Ashly servo-balanced output circuit is an active balanced output. This circuit maintains a constant output level (or difference voltage) between the (+) and (-) output terminals, regardless of either terminal being connected to ground as in an unbalanced output connec- tion.
This servo-balanced output has an advantage over conventional active balanced outputs in that the signal level is unchanged when either the (+) or the (-) output terminals are connected to ground. A conventional ac- tive balanced output would suffer a signal loss of 1/2 the output voltage (or -6dB) if one of the output terminals were grounded in an unbalanced connection.
Tip (+)
Sleeve (Ground)
| | Mono Phone Plug |
| | used for unbalanced |
Pins are | 2 = (+) | |
numbered | XLR Male |
in the | 3 = (gnd) |
connector | 1 = (gnd) | |
insert. | | |
| Input | Output |
| | Terminal Strip |
| (gnd) (+) | (gnd) (+) |
Chassis Ground | Signal Ground |
| | Tip (+) | | |
| | Ring (-) | | |
| | Sleeve (Ground) | |
| | | | Stereo Phone Plug |
| | | | used for balanced |
Pins are | 2 = (+) | | | |
numbered | | | XLR Male |
in the | 3 = (-) | | |
connector | 1 = (gnd) | | |
insert. | | | | |
| Input | Output |
| | | | Terminal Strip |
| (-) | (+) | (-) | (+) |
Chassis Ground | Signal Ground |
Unbalanced Audio Connectors | Balanced Audio Connectors |
4
