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Drawmer DS201 2-Channel Noise Gate

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The Drawmer DS201 Dual Gate is a sophisticated dual channel noise gate incorporating a number of features pioneered by Drawmer, which are invaluable ...Click To Read More About This Product

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The Drawmer DS201 Dual Gate is a sophisticated dual channel noise gate incorporating a number of features pioneered by Drawmer, which are invaluable to the sound engineer, and not found on conventional noise gates.

Setting up noise gates can be tedious and unrewarding. For example, when attempting to separate a signal from unwanted noise or crosstalk that is relatively high in level, spurious triggering of the gate by unwanted components within the sound can be a serious problem. This can often be experienced in the studio when recording a drum kit. If a gate is used to clean up the snare drum sound, it is quite likely that the nearby hi-hats will spill into the snare drum microphone and cause the gate to open. Increasing the threshold level may cure this problem, but then there is a very real danger that any quieter snare drum beats may not cause the gate to open at all and the performance can easily be ruined.

Drawmer solves this problem by including two variable filters, one high-pass and one low-pass, which act upon the side-chain keying circuitry. By setting the output switch to key listen the user can hear the action of the filters and adjust them to reject high frequency spillage from the hi-hats. This now enables the gate to only open on the lower frequencies present in the snare drum.

Drawmer pioneered the concept of frequency conscious gating, and the Drawmer DS201 was the first noise gate to include this feature. The very fast attack of the DS201 means that it can open in a matter of micro seconds, thus preserving the natural attack of whatever sound is being gated and the comprehensive envelope controls mean that the gain can be changed at whatever rate best suits the material being processed. With vocals for example, a fairly fast attack is needed so as not to clip the leading consonants but a slower release time will prevent the end of words being clipped off and will also fade out any noise gradually rather than cutting it off abruptly. This latter point is very important as the human ear is far more sensitive to rapidly changing noise levels than to a constant low level noise.
Another important role played by the gate is in the reshaping of existing sounds. An example of this might involve a simple sampling delay line used to store a sound to be re-triggered later and added to a mix. A gate can be used to impart a slower attack or faster decay to the sound and careful setting of the decay envelope can effectively hide any noise present at the end of the sample. When using a sampler or drum machine the gate can be considered a triggered envelope shaper, and the wide range allowed by the envelope controls make the DS201 ideal for this application.

The unit can be switched to accept a key input, which allows the gate to be triggered externally. An example of this would be to use a snare drum signal to open the gate on a separate ambient microphone to create a natural alternative to gated reverb. Each channel can be individually switched from Gating to Ducking for 'voice over' applications or the removal of 'clicks' and 'pops'.

FEATURES
Variable high pass and low pass filters for "frequency conscious" gating 
comprehensive envelope control, attack, hold, decay, and range
Key input for external triggering
"Key listen" facility
Extremely fast attack time, to preserve the natural attack of the sound
Balanced inputs and outputs
Stereo linkable
Can be used for "Gating" or "Ducking"
High audio specification
SPECIFICATIONS
INPUT IMPEDANCE: 20K Ohms 
MAXIMUM INPUT LEVEL: +17dB
OUTPUT IMPEDANCE: 50 Ohms (bal) 100 Ohms (unbal)
MAXIMUM OUTPUT LEVEL: +17dB
BANDWIDTH 23Hz to 31KHz -1dB
NOISE AT UNITY GAIN ref 0dB, GATE open :
Wideband 22Hz - 22KHz CCIR ARM IEC A Q-Pk CCIR
AV -90dB -95dB -95dB -97dB -84dB
RMS -88dB -93dB -93dB -95dB -
DISTORTION:
_ 100Hz 1KHz 10Khz
0dB input < 0.025% < 0.025% <0.025%
POWER REQUIREMENTS 93-125Volt or 185-250Volt at 50-60Hz, 9 Watts
FUSE RATING 32mA for 230Volt, 63mA for 115Volt
FUSE TYPE 20mm x 5mm, Class 3 Time delay, 250 Volt working._CONFORMING TO BS EN 60127-2:1991 SHEET III
CASE SIZE 482mm (w) x 44mm (h) x 200mm (d)
WEIGHT (incl packaging) 3.4 Kgs
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