Rupert Neve Shelford 5051 Inductor EQ / Compressor - Manual (Page 9)

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The compressor likewise contains some elements of the past, utilizing Class A gain blocks, mixed with
the gain reduction techniques that have been developed over the years and is similar to the Master Buss
Processor. The threshold has a range of -30 dBu to +20 dBu. The ratio can be set from 1.1:1 to 40:1. The
attack has a range of 5 ms to 75 ms, and the release is variable from 100 ms to 2.5 s to be set. Make-up
gain can be set from -6 dB to +20 dB.
The Compressor allows the user to select either a modern feed-forward topology or the traditional feed-
back style of compression. Each has advantages depending on the source and desired sound. The 5051
includes a 12 dB/octave 250Hz high pass filter that can be switched into the compressor side-chain to
reduce the chance that loud low frequency material inadvertently affects the gain reduction. There is also
a link switch and associated 1/4” phone jacks on the back panel so that multiple 5051’s can be properly
used for stereo. The back panel also features a pair of 1/4” phone jacks to patch in your own EQ into the
side-chain for de-essing and finessing the compressor response. The 5051 has two 8 segment fast acting
accurate LED bar-graph meters to indicate Gain Reduction and Output Level.
Unlike other modules for the 5088, the 5051 requires its own standalone power supply to operate. The
power supply features proprietary 4-pin polarized outputs at +24 and -24V DC, and will power up to
twenty-five 5051 modules.
5051 Features
LINE 1 / LINE 2
Allows you to have two sources pre-patched into the 5051. For example you may have an outboard
Microphone Pre-Amp patched into Line 1 and a DAC channel from your DAW into Line 2.
EQ IN
Engages all bands of the equalizer except the hpf.
HF
Adjusts up to 15 dB of boost or cut at selected high frequencies.
8K /16K
With the switch out, the center or corner frequency of the high band is 8 kHz. With the button pressed,
the center or corner frequency changes to 16 kHz. Between this switch and the HI PEAK switch, you
have 4 different EQ curves to finesse the high frequency content.
HI PEAK
When the button is out, the high frequency band operates in shelf mode, boosting or cutting above the
corner frequency at approximately 6 dB/octave. Below the corner frequency the amount of boost or cut
gradually diminishes. With the HI PEAK button pressed, the high frequency band changes to peak mode
with a bell shaped boost or cut curve. The Peak mode utilizes an inductor and capacitor circuit to create
the bell-shaped curve.
MID FREQ
The MID FREQ rotary switch has 6 positions to select the center frequency of the mid band EQ stage.
This circuit utilizes an inductor and capacitors to shape the EQ curve, the same way as Rupert Neve’s