Rupert Neve 543 Mono Compressor / Limiter

The Rupert Neve 543 Mono Compressor delivers the discreet, musical-sounding compression and limitation famous in the Portico 5043 to 500 series.
543 has a fully controllable compressor limiter with feed-forward / feedback modes, Peak / RMS detection and a built-in side chain highpass filter.

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.
Maximum Output Level:
Balanced and Floating Transformer Output
Maximum output from 20 Hz to 40 kHz is +23 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
@ 18Hz, +/- .1dB
@ 150kHz -3dB.
crosstalk
Measured Channel to Channel:
Better than 90 dB @ 15kHz.
METERS:
Monitor INPUT LEVEL and GAIN REDUCTION