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Rear panel, Agx™ (automatic gain expander) – Rocktron R20 User Manual

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Rear Panel

REVERB control

Regulates the amount of REVERB mixed with the original signal from
your guitar. When turned fully counterclockwise, no REVERB is
present.

PHONE (Headphone) jack

Plug headphones into this jack to bypass the power amp and practice
in private.

POWER switch and LED

Switch turns the amp ON and OFF. The red LED shows the amp is
ON.

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AGX™ (Automatic Gain Expander)

Rocktron's patented AGX™ system solves the long standing problem encountered by guitar players

when using high gain distortion. The AGX™ circuit expands the gain of the amplification circuit only when
required based on the input level. When no signal is present, the AGX™ circuit expands down the amplifi-
cation level to a point where hum and noise are dramatically reduced.