COMPRESSOR SECTION
The Compressor in the JWDC allows you to control the dynamic
range of your instrument. Unlike most stomp box compressors,
the compressor in the JWDC has a very natural sound and is
musical - much like professional rack mounted compressors
found in professional studios.
1. SENSITIVITY: The Sensitivity control allows you to make adjust-
ments to the signal level of the compressor’s gain stage. This control
comes in very handy if you are using a guitar with active pickups.
Active pickups tend to have a hotter output than passive pickups.
By adjusting the sensitivity properly, the output level of your
instrument can be controlled, so as not to distort the input of the
compressor. The opposite is true if the guitar has passive or low
output pickups. Raising the sensitivity control increases the input level,
providing a stronger input signal which the compressor needs in order
to work properly.
PRE/POST SWITCH
The Pre/Post switch allows you to place the compressor before
or after the Classic Amp in the signal chain. With the switch in the
"Pre" (down) position, the compressor is placed before the Classic
Amp. With the switch in the "Post" (up) position, the compressor is
placed after the Classic Amp in the signal chain.
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2. RATIO: This knob allows you to set the compression ratio. The range is adjustable from 1:1 to 10:1.
The more you turn this knob up (clockwise), the higher the compressionratio. There is also a soft knee
feature built into the circuit. This means that the ratio will start low and will then increase in direct propor-
tion to the amount that the signal exceeds the threshold.
Everything from mild to fairly heavy compression settings are possible. Thecompressor is a very
flexible circuit that sounds smooth and natural. You will be able to control the dynamic range of your
guitar while simultaneously preserve it's tonal character.
3. OUT: The Out (output) knob controls the level of the output signal from the compressor to the next
effect in your signal chain.
USING THE COMPRESSOR AS A CLEAN BOOST: The compressor on the JWDC can be used as a very
effective clean boost. If set correctly it can boost your amp from subtle to full overdrive with just a few
turns of the control knobs. To use the Compressor as a clean boost, start by setting the Sensitivity control
to about 3:00 o'clock. Back the Ratio control off by setting it to the 10:00 o'clock position. Set the output
control to achieve the desired amount of clean boost to your amp. This is one of the ways that Joe Walsh
likes to use the compressor both on stage and in the studio.
