| Connectors | |
| IN | GK 13-pin Guitar input connector |
| OUT | GK 13-pin Roland guitar synthesizer output connector |
| GTR IN | High impedance regular guitar input jack |
| MIX OUT | Mixer output. Blend of GTR IN Jack and GK guitar signal (GK Pin 7). Levels according to the GK GTR and JACK knobs. |
| S1/S2 | Stereo jack for BOSS FS-6 or FS-7 foot control to trigger the GK S1 and S2 functions. |
| Power | |
| - | The unit is powered by the synth (24mA). |
| Filters | |
| - | Six 4-pole Butterworth High-Pass Filters operating at 50,75 and 100Hz |
FOR MORE INFORMATION - READ THE MANUAL
GKFX-21 MANUAL (PDF)