DS501 OPERATORS’ MANUAL
2
INTRODUCTION
The Drawmer DS501 is a sophisticated dual channel noise gate, which may be used
as two independent channels or linked for true stereo operation. It incorporates a
number of impressive features, many pioneered by Drawmer, which are invaluable
to the sound engineer and not found on conventional noise gates:
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Variable high-pass and low-pass filters for 'frequency conscious' gating.
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Comprehensive envelope control, attack, hold, decay and range.
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Extremely low-noise and low-distortion circuitry.
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Ultra-fast response time.
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Comprehensive side-chain filtering.
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'Key listen' facility.
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'Traffic light' display giving clear indication of gate status.
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Signal below threshold indicator.
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Balanced inputs and outputs.
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Peak punch.
AUDIO CONNECTIONS
All input and output connectors are balanced XLRs, with the wiring convention
being: pin 2 hot, pin 3 cold and pin 1 ground. For unbalanced operation, it is
important to short pin 3 of the XLR connector to ground (pin 1) at both input and
output.
Key inputs are made via ¼" mono jack connectors. If the Key jack sockets are
permanently wired to a patch bay, it is important that the patch bay sockets are fully
normalised to prevent random unwanted triggering.
If earth loop problems are encountered,
never
disconnect the mains earth but
instead, try disconnecting the output signal screen at one end of the cables
connecting the DS501 to the patchbay, we suggest inside the XLR connector itself. If
such measures are necessary, balanced operation is recommended.
