The Controls of the Dirty Shirley Back Panel
1. NOISE GATE
‘CLOSED’ LED
When lit this LED indicates that the Noise Gate is CLOSED. This means the
THRESHOLD setting is higher than the incoming guitar signal and the noise gate
dims the output signal of the amplifier by the amount adjusted with the RANGE con-
trol (e.g. 15dB in the picture above).
NOISE GATE ON / OFF:
Enable or disable the Noise Gate completely. Switch up (‘on’) means the Noise Gate
is activated.
THRESHOLD:
The Noise Gate will dim the output signal of the amplifier as soon as the input signal
(your guitar signal) falls below a certain level. This level is called Threshold. Adjust
the Threshold so the noise of the overdriven amp will be reduced, but make sure you
don´t cut fading notes or chords.
RANGE:
The output level of your amplifier will be reduced or muted when the input signal is
lower than the Threshold setting. You may dim the output level only by a few decibels
(dB), or completely mute the output in pauses by setting the RANGE to its maximum.
2. AMP FILTERS (switchable pre / post)
TIGHT Filter:
With the TIGHT filter you can cut LOW frequencies of either the DI guitar signal
(PRE) or the processed amp output (POST).
PRE: If your guitar pickups produce a rumbling bass sound you can filter the low
end before the DI sound even hits the amplifier.
POST: If you want to cut some of the low end of your amplifier setting (maybe
even only temporary) you can use this studio quality high pass filter to reduce the
bass.
OFF: when set to OFF the TIGHT filter is in bypass mode.
SMOOTH Filter
With the SMOOTH filter you can cut HIGH frequencies of either the DI guitar sig-
nal (PRE) or the processed amp output (POST).
PRE: If your guitar pickups catch a lot of hiss or noise you can filter the high end
before the DI sound even hits the amplifier.
POST: If you want to cut some of the high end of your amplifier setting (maybe
even only temporary) you can use this studio quality low pass filter to reduce tre-
ble.
OFF: when set to OFF the SMOOTH filter is in bypass mode
