The Shelford 5052 echoes the simple and definitive 1073 feature set with a vertically-oriented mic pre, high pass filter, and 3-band inductor EQ, while also incorporating modern capabilities like the variable Silk / Texture control from the Portico II Series and simultaneous pre / post “tape” operation. Utilizing class-A, discrete, +/- 24V topologies with custom-wound transformers and inductors, Rupert Neve designed the 5052 as a vintage-style channel strip that captures the soul of his classic designs, without the previous compromises. Like Rupert’s designs from his time in Shelford, the 5052 preamplifier has 72dB of discrete, class-A gain coupled with serious square-core transformers. Unlike the classics however, the output transformer features the Silk Red / Blue and Texture controls from the Portico II Series to hone the harmonic content and tonality of the output stage. By engaging these controls and sufficiently driving the output, the 5052 can produce up to 4-5% THD (primarily 2nd order, some 3rd order), bringing a richness and thickness to tracks when desired with no danger of overloading the output stage. With Silk disengaged, the output is modern and pristine, yet still retains Rupert’s signature larger-than-life transformer sound. The mic pre section also includes a sweepable 20-250Hz high-pass filter, Mic / Line selection, 48V phantom power, and polarity reverse.
Rupert Neve Designs 5052 Features:
MIC GAIN A 12-way precision rotary switch controls gain from 0 to 66 dB in 6 dB steps.
SILK / TEXTURE Pushing the Silk button cycles the silk modes from red silk to blue silk to off. Silk reduces the negative feedback on the output transformer, adding harmonic content as the texture is increased. Red Silk accentuates the saturation in the mid and high frequencies, similar to that of the red silk mode on the Portico II Channel. Blue Silk accentuates low frequencies. By manipulating the Texture control, the amount of Silk can be changed from essentially absent, to roughly 4-5% THD (mostly second order) depending on how hard the output transformer is being driven.
INDUCTOR EQ The first inductor based EQ designed by Rupert Neve since the mid 70’s, the 5051 EQ is very reminiscent of Mr. Neve’s classic EQ, while providing a thoroughly modern performance.
HPF 12 dB/octave High Pass variable from 20-250Hz
LOW EQ +/- 15dB Shelf or peak, selectable at 35 Hz, 60 Hz, 100 Hz or 220 Hz.
MID EQ +/- 15dB with 6 center frequencies; 200 Hz, 350 Hz, 700 Hz, 1.5 kHz, 3 kHz and 6 kHz, with High Peak switch to narrow the bandwidth or increase the Q of the filter.
HIGH SHELF +/- 15dB Shelf or peak selectable at 8 kHz to 16 kHz.
TRIM Continuously variable +/-6 dB level trim control.
+48V Engages phantom power on the microphone input
POLARITY Push button inverts the polarity of the signal path, and illuminates when engaged. The symbol “Ø” is often used to denote opposite polarity.
HIGH PASS FILTER The high pass filter is continuously variable from 20-250Hz and engaged by the HPF switch, which illuminates when engaged. It is a valuable aid in any signal chain, but particularly so in a microphone preamplifier. Signals below the selected frequency are attenuated at a rate of 12db / octave, getting rid of proximity effect, building rumble, air handling, motor hum, etc.
LEVEL METER An Eight-segment LED bar-graph meter displays output level (pre-Silk). The color range proceeds from green for lower level signals, yellow for intermediate signals, and red for high levels. When the 5052 is clipped, the highest red LED will hold longer depending on how far above the clip threshold the signal was.
Rupert Neve Designs 5052 Specifications:
Frequency Response: Main Output, no load, –3 dB @ 2.5 Hz –3 dB @ 125 kHz
Noise: Measured at Main Output, unweighted, 22Hz-22kHz, Terminated 40 Ohms, With gain at unity better than –102 dBu
Maximum input: from 20 Hz to 20 kHz, +25 dBu.
Maximum output: from 20 Hz to 20 kHz is +25 dBu. Total Harmonic Distortion and Noise: from <10 Hz to 80 kHz, @ 1kHz, +20 dBu output: Better than 0.002% @ 20Hz, +20 dBu out Better than 0.120% 13 @ 20kHz, +20 dBu out Better than 0.010% Equalizer
Noise: Measured at Main Output, unweighted, 22Hz-22kHz, Terminated 40 Ohms. with all gains set at 0, Better than –92 dBu
Maximum input: from 20 Hz to 20 kH, +24.5 dBu
Maximum output: from 20 Hz to 20 kHz, +24.5 dBu
Total Harmonic Distortion and Noise: from <10 Hz to 80 kHz, @ 1kHz, +20 dBu output: Better than 0.007% @ 20Hz, +20 dBu out Better than 0.120% @ 20kHz, +20 dBu out Better than 0.070%
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