The 5051 combines a classic three band EQ based on Rupert’s vintage designs with the power and flexibility of the Portico II compressor. Utilizing a fully-discrete, class-A signal path and high performance input and output transformers, the 5051 delivers the performance and musicality expected from a Rupert Neve Design.

The Equaliser

The EQ design on the 5051 evokes sonic similarities with some of Rupert’s classic EQs. The 5051 uses a custom tapped inductor with selected capacitors to form the mid range equalizer band, and the shelf curves are based on Rupert's vintage modules, including very similar frequency choices. Each EQ section also uses low feedback class-A discrete electronics to prevent low level artifacts and harshness from detracting from the tonal shaping. The EQ, however, is a modern design with advantages offered by techniques that were not possible 35 years ago along with improvements in electronic components currently available, and should not be considered a clone – it just has heritage.

Both the High and Low Band can be switched from Shelf to Peak curves and offer 15 dB of boost or cut. The High can be switched from 8 kHz to 16 kHz and the Low Band selected at 35 Hz, 60 Hz, 100 Hz or 220 Hz. The inductor based Mid Band offers 6 center frequencies; 200 Hz, 350 Hz, 700 Hz, 1.5 kHz, 3 kHz and 6 kHz. The Mid Band also has a High Peak switch to narrow the bandwidth or increase the Q of the filter. The 5051 includes an 18 dB/octave High Pass Filter with two corner frequencies on a lit button that toggles through OFF, 60 Hz then 120 Hz indicated by a blue or red LED respectively. 
Additionally, the EQ can be switched Pre or Post the compressor. Normally the EQ precedes the compressor but the order can be selected so that the EQ follows after the Compressor. The 5051 also has two XLR balanced inputs that can be switched from the front panel. This allows the user, for example, to have a mic preamplifier and line input from a DAW to be pre-patched and easily selectable.

The Compressor

The 5051 Compressor also features a discrete class A signal path proven used in the Portico Series, withindividually controllable threshold, attack, release, makeup gain, ratio, side chain HPF, Feed-Forward / Feed-back selection and Peak/RMS detection modes. With the compressor inactive, the 5051 may be used as a transformer-coupled, high-performance line amplifier, and two 5051′s may be linked for stereo operation as well.

The Power Supply

The 5051 is intended for 5088 consoles or 5285 vertical frames. There are two +/- 24V power supply options; The 5-way supply is designed to sit in the bottom of a rack, and the 25-way supply is a 2U enclosure. The external +/- 24V supply provides exceptionally clean power, and reduces heat build-up within modules associated with DC-DC up-conversion.

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