Troubleshooting

No effects are being applied.

Is the GK-2A’s selection switch set to “MIX?”

When set to “GUITAR” or “SYNTH,” the necessary signals may not be input to the unit, which may prevent effects from being applied.

No effects are applied to sounds input to GUITAR RETURN and normal pickup sounds.

Noise is produced.

Is the external device connected to the GUITAR RETURN jack working properly?

When the GUITAR RETURN jack is used, the signals input to this jack are used instead of the normal pickup sound.

Therefore, noise may be produced when you’ve failed to switch on the external device’s power, or you haven’t hooked it up properly.

Is the GK cable securely connected?

When connecting the GK cable, insert the connector completely, until it is locked.

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Boss Audio Systems OC-20G owner manual No effects are being applied, Noise is produced