CONTROLS LEVEL: In Compressor mode adjusts the overall volume and the FGC can be used even as a booster. In Sustain mode, the Level no longer adjusts total output but the level of the sustained part. COMPR.: Sets the amount of compression and sustain. lower settings give mostly peak limiting, higher settings more compression and less touch sensitive response. at maximum the output will be heavily compressed, while still retaining clarity at almost infinite sustain. A good starting point for this control is a bit below center (ten o’clock) with most guitars. TONE: Tone control on FGC is designed to fine-tune the compressed sound for most transparent tone and effect: adjust CCW for full range compression and set at noon for tighter sound with a little less bottom end and turn fully CW to slightly reduce upper treble. COMPRESSOR/SUSTAIN SWITCH.: Attack and decay times are carefully fine-tuned and internally set for swift attack and slow decay. Sustain/Compression switch set for Sustain the attack is preserved allowing dynamic touch and ease of playing as the FGC amplifies the decay and weaker parts. For standard compression set the mode switch to Compressor. ELECTRICAL SPESIFICATIONS Supply voltage range: 9 to 18VDC Current consumption: 14mA at 9VDC Input impedance: 1M Ohm’s Output impedance: 20K Ohm’s Complete bypass (true bypass) Max input -10dBV Hardwire true-bypass Complete bypass (true bypass) Max input -10dBV Hardwire true-bypass