Rupert Neve 5043-V 2-Channel Compressor / Limiter (vertical)
2-Channel Compressor / Limiter (vertical)
The 5043 Compressor/Limiter Duo is a new and powerful approach to
dynamic processing! This new addition to the Portico range is designed
with both tracking and mixing applications in mind.
The Portico 5043 embodies two independent Compressor-Limiters
(Channels A and B) housed within a half rack, 1U module. They can be
used independently or connected in sequence to provide two separate
control slopes.
When used independently, for example, as a stereo pair, linking the
D.C. control circuits via a front panel Push-Button, enables the level
of each unit, “A” and “B”, to be held in a constant relationship. Rear
panel TRS connections are provided to link multiple 5043s. This linking
may also be extended to the former AMEK CIB and DMCL units.
When used in sequence, the Portico 5043 can be configured easily to
provide dual slope compression and limiting as suggested in the graphs
below.
Buss or Line Input Selection
Any number of Portico modules that are equipped with the “TO BUSS”
button may be sent to the BUSS input of the 5043 which makes it the
ideal choice to form the core of a simple and cost-effective Portico
mixing system. The Line input, when selected, provides a dedicated,
transformer-balanced 10K impedance bridging input so that the 5043 may
be inserted or included in any appropriate part of the signal chain at
Console line-up level.
How it Works
In order to control gain, a V.C.A. or Voltage Controlled Amplifier
(or Attenuator) is used. There are many types of V.C. including the use
of tubes, discrete and integrated solid state circuits and naturally
non-linear devices, each one having its characteristic behavior that
reflects sonically on the final performance, and gives it a character
or signature that can be musically attractive or not! The Portico 5043
makes use of a very accurate, low noise, low distortion V.C.A. having,
essentially, no signature of its own.
A part of the audio signal is rectified and smoothed to produce a
suitable control voltage for the V.C.A. which has to respond very
quickly and have low distortion. If the response is too fast, low
frequency signals will themselves, be gain controlled! If the response
is too slow, the signal will overshoot and the first few cycles will
not get compressed. The speed and accuracy of the response, known as
the “attack”, and the time frame that gain remains under the initial
control, known as “release” or “recovery” and plays a large part in the
way a compressor sounds.
All Portico modules use input and output transformers and, almost
entirely discrete component amplifiers. In fact the Line amplifiers on
their own, inserted into the signal chain, are capable of enhancing the
sonic quality of many signal sources, especially those of digital
origin. These are some of the factors that enable, the Portico 5043, to
work so unobtrusively within the context of a very high quality audio
chain.
Tech Specs
| Gain Range: |
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Continuously variable from 6 dB to +20 dB.
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Threshold Range: |
Continuously variable from 36 dB to +22 dB.
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| Ratio Range: |
Continuously variable from 1.1:1 to Limit (40:1).
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| Attack Range: |
Continuously variable from 20mS to 75mS
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| Release Range: |
Continuously variable from 100mS to 2.5 Seconds.
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| FF/FB: |
Feed-Forward or Feed-Back VCA control.
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| S/C or LINK: |
Multiple
5043’s may be daisy-chained via the rear panel jacks. When an
individual channel is engaged, it’s control voltage appears at the rear
panel LINK jack. When both channels are engaged they are linked
together internally and their control voltage also appears at the rear
panel LINK jack.
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| LINE or BUSS input select: |
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Selects rear XLR input or Buss Input jacks to accept Portico series buss outputs.
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| Maximum Output Level: |
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Balanced and Floating Transformer Output
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+25 dBu. |
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| Total Harmonic Distortion and Noise: |
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@ 1kHz, +20 dBu output level, no load. |
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Main Output, compressor bypassed |
Better than 0.0006%. |
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Main Output, compressor engaged |
Better than 0.02% |
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| Noise: |
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Measured at Main Output, un-weighted, 22Hz-22kHz, Terminated 40 Ohms.
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With Gain at Unity, Compressor disengaged |
Better than –103 dBu. |
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With Gain at Unity, Compressor engaged: |
Better than 92 dBu |
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| Frequency Response: |
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Main Output, Unity Gain |
@ 18 Hz, –3 dB. |
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@ 150 kHz 3 dB. |
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| Crosstalk |
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Measured Channel to Channel:
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Better than 80 dB @ 16kHz. |
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| METERS A/B: |
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Monitors INPUT LEVEL and GAIN REDUCTION of either Channel A or Channel B.
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| 5043 Power: |
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Voltage Range:
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9 to 18 Volts DC, 9Watts |
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Connector:
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5.5mm X 2.5mm DC jack, Center Positive |
Current consumption:
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@ 9VDC = 1.0 A typical
@12VDC = 730 mA typical
@15VDC= 570 mA typical
@18VDC= 480 mA typical |
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input impedance
output impedasnce
