The MX30 Gated/Comp/Limiter is a low cost professional quality dynamics processor containing some of
the proprietary design circuitry used in the more expensive models in the Drawmer range. The MX30 has many automated features
enabling fast, effective dynamic control whilst retaining the instinctively laid out control parameters, sonic character and
high technical specification which have made Drawmer the industry standard. The MX30's competitive price point brings Drawmer's
professional processing into a much wider musician, project studio and live performance area.
Operational control is
split into three sections:- Gate, Compressor, Output:
'Program Adaptive' Gate
Used to remove unwanted noise below a pre-set level, each channel consists of a variable Threshold Gate incorporating Drawmer's
'Programme Adaptive' circuitry. Although quick and simple to operate, the gate's auto-circuitry continually optimises such
parameters as Attack, Hold, Ratio and Release, completely eliminating 'chatter' when the signal is fluctuating on or around
Threshold. Two LED's show when the signal is 'above' or 'below' Threshold and a push button switch allows additional control
of Release time. This design approach also retains all 'leading edge' information making the gate ideal for 'cleaning up'
vocals or retaining the 'punch' on gated drums. Switching is provided for 'Fast' or 'Slow' release characteristics. The 'Fast'
mode can be used for instruments with rapid decay times or for additional tightening of the gating effect. The 'Slow' mode
is more suitable for vocals and instruments with longer decay times or can be used to smooth over rough fade outs. A single
LED indicates gating action.
Soft Knee 'Auto Compressor'
The gate is followed by a variable Threshold, variable Ratio, soft knee compressor with fully automatic Attack and Release.
Large transients are controlled instantly whilst small signal variations are treated gently, retaining as much 'life' as possible
and without generating unpredictable side effects. From the slightest to the most aggressive levels of compression, the MX30
handles it all with ease and displays the amount of compression taking place on a high resolution Gain Reduction bargraph
The Gain control is used to compensate for the amount of compression and brings the signal to the required output level as
displayed by the output bargraph meter. A variable Threshold 'zero overshoot' limiter, essential for avoiding distortion when
mastering to digital or speaker protection in a 'live' situation, adds the final polish to the signal by keeping control over
signal peaks. The Limit threshold provides an absolute maximum peak level which no signal can pass. Fast transients are clipped
instantly whilst more sustained peaks are dealt with by applying Gain Reduction, indicated by a single LED.
Gate Threshold: This control sets the level below which gating takes place and may be set anywhere in the range of -70dB to
+20dB. A green LED illuminates to show when the signal is above threshold (i.e. gate open) and a red LED illuminates when
the signal is below Threshold (i.e. gate closed).
Release: Either a Fast or Slow auto release contour may be selected depending on the material being processed. An LED indicates
when Slow release status is engaged. Percussive material with little or no reverb is generally treated using the Fast release
setting, whereas with slow decays or a significant amount of added reverb will usually respond better to the Slow release
Compressor Threshold: This determines the input level above which gain reduction will be applied and may be set anywhere in
the range of -40dB to +20dB. Soft Knee compression takes place for signals exceeding the threshold level by up to 10dB above
which level, conventional 'ratio' compression is applied.
Gain Reduction Bargraph Meter: A nine segment LED bargraph meter continuously monitors the gain reduction applied by the compressor
over a range of 0dB to 30dB.
Ratio: Sets the final compression ratio that will be applied once the 10dB soft knee region is exceeded. The ratio may be
continuously adjusted from 1.2:1 to infinity:1 allowing the possibility of true hard limiting. The higher the ratio setting
the more compression takes place (eg. A ratio of 8:1 means that an 8dB increase in volume at the input will appear as a 1dB
increase in volume at the output).
Stereo Link: The unit can function as two independent gated/compressor/limiters or when 'link' mode is engaged for stereo
use Channel 1 becomes the master, automatically duplicating its parameters across to Channel 2. In this mode the same degree
of gain reduction is applied to both audio channels to prevent image shifting.
Output Gain: The output level may be attenuated or amplified by up to 20dB to compensate for level changes caused by compression.
This control comes directly before the Peak Limiter detector and this fact should be taken into account when setting the Peak
Peak Limit: This control sets an absolute limit that the output signal will not be permitted to exceed. The limiter is 'zero
response time' and controls peaks without any audible distortion. For transparent 'peak protection' the output gain control
should be set to ensure that the Peak Limiter operates only occasionally. Alternatively, the unit can be driven into heavy
limiting for creative effects.
Input/Output Bargraph Meter: An eight segment LED bargraph level meter monitors the level of the output signal over a range
of -20dB to +15dB. When Bypass is selected this meter reads input level.
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Drawmer MX30 Gated/Compressor/Limiter Specifications:
- (measurements taken using +4dBu balanced XLR input where applicable)
- INPUT IMPEDANCE: 20Kohm( bal.), 4 K Ohms (unbal.)
- MAXIMUM INPUT LEVEL: +21dBu
- OUTPUT IMPEDANCE: 50 Ohm (bal), 100 Ohms (unbal.)
- MAXIMUM OUTPUT LEVEL: +20dBu
- BANDWIDTH: <10Hz to 36KHz -1dB
- CROSSTALK: @10kHz < -94dB
- @1kHz <-100dB
- OUTPUT BALANCE: Better than 40dB 20Hz to 10kHz
- INPUT CMR: Better than 40dB 20Hz to 10kHz
- NOISE AT UNITY GAIN reference +4dBu:
- Wideband 22Hz - 22KHz CCIR ARM IEC A Q-Pk CCIR
- AV -95dB -101dB -100dB -102dB -89dB
- RMS -95dB -101dB -98dB -100dB -87dB
- DISTORTION: 100Hz 1KHz 10Khz
- Unity Gain, +4dBu input < 0.03% < 0.02% <0.03%
- +14dBu input, 10dB Gain Red. < 0.2% < 0.2% < 0.2%
- POWER REQUIREMENTS: 115Volt or 230Volt at 50-60Hz, 9 Watts
- FUSE RATING: T32mA for 230Volt, 1T63mA for 115Volt
- CONFORMING TO BS EN 60127-2:1991 SHEET III
- FUSE TYPE: 20mm x 5mm, Class 3 Slo-Blo, 250Volt working
- CASE SIZE: 482mm (w) x 44mm (h) x 200mm (d)
- WEIGHT: (incl packaging) 3.2 Kgs