Rupert Neve Designs Portico 5043-H (Horizontal) Compressor-Limiter Duo
คอมเพรสเซอร์ Neve 5043-H 2-channel Compressor/limiter designed for both recording and mixing applications สำหรับการใช้งานแบบแนวนอน
The Portico 5043 embodies two independent Compressor-Limiters (Channels A and B) housed within a half rack, 1U module. They can be used independently (on two distinct tracks), linked as a stereo pair, or connected in sequence to provide two separate control slopes. When used as a stereo pair, linking the DC control circuits via the front panel A/B button enables the level of each channel to be held in a constant relationship. Rear panel TRS connections are provided to link multiple 5043s. This linking may also be extended to some of Rupert’s former AMEK CIB and DMCL units.
Dual Compressor-Limiter Channels
Independent and Stereo Channel Operation
Composite Compression and Limiting
Feed-Forward and Feed-Back Compression
Link Multiple Units Together via TRS
Buss or Line Input with Impedance Bridge
Ducking
Metering
Features
Compression
For signals below the “threshold” level that has been set, a compressor provides a linear path allowing signals to be amplified without the gain being adjusted in any way. When signals exceed the “threshold” level, the gain is reduced in a controlled manner that depends on the Ratio that has been set.
Gain
GAIN range provided is from -6dB to +20 dB. ?As already noted, when compression has taken place, it may be necessary to increase the overall gain to restore the apparent program level
Ratio
Range from 1:1 to LIMIT (i.e. 40:1)
Threshold
Range from -30dBu to +20dBU
Attack Time
Range from 20 mS to 75 mS.
Release / Recovery Time
Range of RELEASE time is 100 mS to 2.5 Seconds.
Stereo Operation
When the LINK Push-Button is engaged on both channels and the two channels, A and B, set to approximately the same values, GAIN control on both channels will be the same to preserve Stereo balance, levels normally being controlled by the channel with the higher signal level.
Composite Operation
Cascading the two independent sections of the Portico 5043 Compressor- Limiter provides extremely powerful and comprehensive control of Dynamic Range.
When an external audio connection is made from the output of one channel to the input of the other, the overall compression characteristics become a composite of the two. For example, Channel A may be set up as a Low Ratio compressor and Channel B may be set up as a High Ratio Compressor or Limiter, to produce powerful composite characteristics:
Ducking
When the LINK Push-Button is engaged, the signal passing through, channel A, may be used to control the amplitude of channel B. For example, the level of music through channel A can be controlled by speech on channel B, i.e. reducing the music level to make a “speech-over” announcement.
Meters
Two Peak LED METERS are provided that show OUTPUT LEVEL and GAIN REDUCTION. These are switched between Channel A and Channel B on the central METER SELECT Push Button.
Output level meter covers the range from -10 to +22 dBu and above which is regarded as overload.
REDUCTION is calibrated in dB covering the range +1 to 22 dBu, reading from right to left,
Specifications
คอมเพรสเซอร์ Rupert Neve Designs Portico 5043-H (Horizontal)
Gain Range
Continuously variable from -6 to +20 dB
Threshold Range
Continuously variable from -36 dB to +22 dB
Ratio
Continuously variable from 1.1:1 to “Limit” (40:1)
Attack
Continuously variable from 20 to 75 mS
Release
Continuously variable from 100 to 2500 mS
Compressor
Feed-Forward or Feed-Back VCA control
Inputs
Selectable
2 x XLR2 x 1/4″ Buss input jack for Portico series Buss outputs
Maximum Output Level
Balanced and Floating Transformer Output: +25 dBu
THD & Noise
At 2 kHz, +20 dBu output level, no load
Main output, compressor bypassed: better than 0.001%
Main output, compressor engaged: better than 0.06%
Noise: mostly 2nd harmonic
Measured at main output, un-weighted, 22 Hz to 22 kHz, terminated 40Ω
With gain at unity, compressor disengaged: better than -103 dBu
With gain at unity, compressor engaged: better than -92 dBu
Frequency Response
Main output, unity gain at 18 Hz: -3 dB
Main output, unity gain at 150 kHz: -3 dB
Crosstalk
Measured channel to channel: Better than -80 dB at 16 kHz
Meters
Monitors INPUT LEVEL and GAIN REDUCTION of either channel A or channel B
Power
Voltage Range: 9 to 18 VDC, 9 W
Connector: 0.2 x 0.1″ (5.5 X 2.5 mm) DC jack, center positive
