GKFX-1 contain specially designed filters to improve PCM/COSM tracking and ghost note immunity as well as lowering noise when palm muting.
Most noted effect on GR-55, GP-10 and VG-99 when using Piezo 13-pin guitars.
13-pin GK Guitar input and 13-pin GK Guitar synth output. 13-pin patch cable included (1 meter). GKFX-1 is self-powered by synth unit.
The input jack allows you to connect a regular guitar to your synth for COSM processing.
Individual volume control for the guitar jack and the regular pickups.
| IN | GK 13-pin Guitar input connector |
| OUT | GK 13-pin Roland guitar synthesizer output connector |
| INPUT | High impedance regular guitar input jack |
| SEND | Buffered mixer output. Blend of GTR IN Jack and GK guitar signal (GK Pin 7). Levels according to the GK GTR and JACK knobs. |
| RETURN | Buffered input from external guitar pedal (for FX loop) |
| 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). |
| Switches | The Filter ON/OFF switch turns the hex subsonic filters on/off |
| Filters | Six 4-pole Butterworth High-Pass Filters operating at 50,75 and 100Hz |
A picture showing the IN and OUT 13-pin connectors of the GKFX1
INPUT allows you to connect a regular guitar into your synth (no polyphonic synth effects). The RETURN jack will override the regular guitar pickup sound from the INPUT. This allows you to connect effect pedals between SEND and RETURN jacks.
S1/S2 allows you to control synth S1/S2 using an external foot-switch. SEND allows you to hijack the guitar sound and feed it somewhere else, maybe to guitar pedals and then back to RETURN jack or to another amp.
GKFX-1 Connections Chart
Here's the complete connection chart of the GKFX-1
