The 5043 Duo Compressor/Limiter is a powerful approach to dynamics processing for the Portico Series, 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 (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.
Rupert Neve Designs Portico 5043-H 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.
Rupert Neve Designs Portico 5043-H Specifications:
Gain Range: Continuously variable from 6 dB to +20 dB.
Threshold Range: Continuously variable from 36 dB to +22 dB.
Ratio Range: Continuously variable from 1.1:1 to Limit (40:1).
Attack Range: Continuously variable from 20mS to 75mS
Release Range: Continuously variable from 100mS to 2.5 Seconds.
FF/FB: Feed-Forward or Feed-Back VCA control.
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.
LINE or BUSS input select: Selects rear XLR input or Buss Input jacks to accept Portico series buss outputs.
Maximum Output Level: Balanced and Floating Transformer Output +25 dBu.
Total Harmonic Distortion and Noise: @ 1kHz, +20 dBu output level, no load. Main Output, compressor bypassed Better than 0.0006%. Main Output, compressor engaged Better than 0.02%
Noise: Measured at Main Output, un-weighted, 22Hz-22kHz, Terminated 40 Ohms. 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 @ 18 Hz, 3 dB. @ 150 kHz 3 dB.
Crosstalk Measured Channel to Channel: Better than 80 dB @ 16kHz.
METERS A/B: Monitors INPUT LEVEL and GAIN REDUCTION of either Channel A or Channel B.
5043 Power: Voltage Range: 9 to 18 Volts DC, 9Watts
Connector: 5.5mm X 2.5mm DC jack, Center Positive
Current consumption: @ 9VDC = 1.0 A typical @12VDC = 730 mA typical @15VDC= 570 mA typical @18VDC= 480 mA typical input impedance output impedasnce
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