GFX-20 Amplifier, Equalization | Crate Amplifiers specification

GFX-20 Amplifier

1:INPUT: Connect your guitar here using a shielded instrument cable.

OVERDRIVE CHANNEL: A high gain chan- nel giving you sounds from a slight edge to serious overdrive.

2:GAIN: This control sets the amount of compression and distortion from the amplifi- er. With the control towards far left, the sound will have a thick compressed quality. As you turn the control to the right the amount of distortion increases. Crate’s exclusive “Flex-Wave” circuitry uses sequen- tial cascading gains to deliver distortion which is rich in harmonics and “touch sensi- tive.” Use this control along with the Level (#3) to create a wide variety of sounds.

3:LEVEL: This control sets the output vol- ume level from the Overdrive channel: in the far left position there will be no output; as you turn the control to the right the output increases. Use this control along with the Gain control (#2) to create a wide variety of sounds.

4:OVERDRIVE SELECT: When this push- button switch is pressed in the Overdrive channel is engaged. The clean channel is selected when this switch is out.

CLEAN CHANNEL: A normal gain channel designed to give you crystal clear sounds to medium distortion.

5:LEVEL: This control sets the output vol- ume level from the Clean channel: in the far- left position there will be no output; as you turn the control to the right the output level increases. The far right setting is maximum output - as you increase the level, roll back the Low control (#6).

EQUALIZATION

6:LOW: Adjust the low frequency output level with this control: turning the control to the left reduces the low frequency output; turning it to the right increases the low fre- quency output. The Low control allows a total range of 25dB of boost or cut at 80Hz. Due to the massive amount of low end avail- able, you may want to “roll off” the bass at high volumes.

7:MID: Adjust the mid frequency output level with this control: the center position is “flat” (no boost or cut). Turning the control to the left reduces the midrange output; turning it to the right increases the midrange output. The Mid control allows for 19dB of boost or cut at 900Hz.

8:HIGH: Adjust the high frequency output level with this control: in the center position the high frequency output will be “flat” (no boost or cut). Turning the control to the left reduces the high frequency output; turning it to the right increases the high frequency out- put. The High control allows a total range of 23dB of boost or cut at 5kHz.