Rupert Neve Designs 543 Mono Compressor/Limiter

GAIN RANGE
Continuously variable from -6 dB to +20 dB

THRESHOLD RANGE
Continuously variable from -30 dB to +20 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

TOTAL HARMONIC DISTORTION AND NOISE
@ 1 kHz, 0 dBu output level, no load.
Main Output, compressor bypassed: Better than 0.002%
@ 20 dBu better than 0.0015%
Main output, compressor engaged: Better than 0.075%

NOISE
Measured at Main Output, un-weighted, 22 Hz – 22 kHz, Terminated 50 Ohm.
With Gain at Unity, Compressor disengaged: Better than -98 dBu
With Gain at Unity, Compressor engaged: Better than -93 dBu

FREQUENCY RESPONSE
Main Output, Unity Gain: @ 150 kHz -3 dB

METERS
Monitors INPUT LEVEL and GAIN REDUCTION

LINE INPUT IMPEDANCE
10,000 Ohms

MAXIMUM OUTPUT LEVEL
21 dBu from 20 Hz to 40 kHz

POWER REQUIREMENTS
500 series rack with 110-125 mA @ +/- 16V