Rupert Neve Designs 5025 19-Inch Rackmount Dual Shelford Microphone Preamplifier

ITEM #: RUP-5025 MFG #: 5025

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Our Price:

$3,999.00

After Savings:

$3,249.00

Availability: Usually Ships in 5-14 Days.
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5025 - Overview

Two Channels of the Finest Microphone Preamplification in the World.

Rupert Neve Designs best-selling Shelford Channel is the definitive evolution of the original technologies in Rupert's classic modules like the 1073, 1064 & 2254, thoughtfully advanced and refined for the 21st century studio.

Originally released as a limited edition and back by popular demand, they are now offering the Dual Shelford Mic Pre: a two-channel version of Rupert Neve's flagship preamplifier that has become an indispensable tool for countless engineers and musicians. The Dual Shelford offers the sonic excellence of two Rupert's Shelford mic preamps in a single rack space with an internal power supply; simply put, these are two channels of the finest microphone preamplification in the world.

The Transformer Gain Mic Pre
Like Rupert's designs from his time in Little Shelford, the Dual Shelford Pre uses a custom step-up transformer on the microphone input that provides the first 15 dB of gain. This specially-designed transformer, along with its careful integration with the surrounding class-A circuitry, is critical to the amplifier's bold, mid-focused magic that can be heard on thousands of classic recordings.

While the majority of the harmonic richness found in Rupert's designs is a product of the output transformer and surrounding class-A amplifiers, this step-up input transformer also imparts a unique musical enhancement of its own. The technical reasons for this are primarily a result of the reactive impedance characteristic of the input transformer and how that interacts with the connected microphone, resulting in subtle, non-linear harmonic enhancement of the lows and an unmistakable sweetness in the high frequencies.

While creating the input stage for the Shelford Channel and Dual Shelford Pre, the goal was not merely to recreate the classic designs, but to advance them: combining the unmistakable sound of the vintage technology with wide-bandwidth frequency response, consistently excellent amplifier performance at any gain setting, and extremely low noise operation.

To achieve this, the custom transformer designs were carefully optimized and complete MuMetal shielding of the input transformer was implemented. The resulting preamplifier is flat from below 10Hz to above 60kHz, resulting in the purest possible tone and the very highest levels of versatility.

What Is Silk?
The Silk & Texture circuit on the Dual Shelford Mic Pre allows you to fine-tune the amount (and type) of harmonic content in the output stage. This means your signal can be adjusted from quite transparent to settings that produce nearly 10x the amount of sonic color as Rupert's vintage modules - and in two very unique modes. No matter what sound you're looking for, Silk can help get you there.

Please Note: The DA11ARC will only decode a 2ch HDMI ARC signal and is not compatible with multi-channel HDMI audio codecs.

  • Features:

    • Mic Gain: 12-way precision rotary switch controls gain from 0 to 66 dB in 6 dB steps.
    • Trim: This rotary switch provides further continuous gain adjustment over a range of +/- 6 dB.
    • 48V: This push button switch engages phantom power on the microphone input.
    • Polarity: This push button switch inverts the polarity of the signal path. It illuminates when engaged. (The symbol "Ø" is often used to denote opposite polarity.)
    • HPF/HPF FREQ: The HPF switch engages a 12dB per octave high pass filter. The HPF FREQ potentiometer is variable from 20Hz to 250Hz, and can be used to filter out unwanted low frequencies, or in conjunction with the EQ to help shape source material. Note that engaging the HPF to S/C switch moves the HPF from the primary signal path to the compressor side-chain signal path.
    • Silk/Texture: Pushing the Silk button cycles the Silk modes from Red to Blue to OFF. Silk reduces the negative feedback on the output transformer, adding harmonic content as the texture is increased. Red Silk accentuates the musical harmonic saturation from the mid and high frequencies, while Blue Silk accentuates harmonics from the low and low-mid frequencies.
    • VU Meters: The VU Meters are calibrated to display average (RMS) output levels.
    • Peak LED: Red indicates near clipping of the output stage.
    • Dual Tap Output: In addition to the MAIN full-headroom output, the -6dB output creates a rich harmonic character while reducing the risk of clipping the next device in the chain.
    • GND Lift: This switch separates the direct connection from audio signal ground to chassis earth.
    • Universal IEC Power Input: Works worldwide, accepting voltages from 100-240VAC.
     
  • Specifications:

    • Input Impedance: 2.2kΩ
    • Maximum Input Level:
      - @ 1kHz: +24.9dBu
      - @ 1kHz (Main Out): +26.7dBu
      - @ 1kHz (-6dB Out): +20.7dBu
    • Frequency Response:
      - 20Hz - 20kHz: ±0.25dB
      - 10Hz - 62kHz: ±0.5dB
      - 5Hz: << -3dB
      - 70 kHz: -3 dB
    • THD+N% (BW 10Hz - 90kHz):
      - 0dBu Input, 1kHz: < 0.0025%
      - +20dBu Input, 1kHz: < 0.008%
    • Noise At Main Output (BW 22Hz - 22kHz):
      - 0dB Gain: -102dBu
      - +30dB Gain: -94dBu
      - +66dB Gain: -61dBu
      - EIN (+66dB Gain): -127dBu
    • Noise At -6dB Output (BW 22Hz - 22kHz):
      - 0dB Gain: -107dBu
      - +30dB Gain: -100dBu
      - +66dB Gain: -67dBu
      - EIN (+66dB Gain): -133dBu
    • Product Dimensions (WxDxH): 19" x 9.2" x 1.75" (48.3cm x 23.4cm x 4.4cm)
    • Shipping Dimensions (WxDxH): 24" x 13" x 4" (61cm x 33cm x 10.2cm)
    • Shipping Weight: 11lbs (5kg)


      All specifications are typical
      ZSOURCE = 150 Ω Balanced, 30 ft. XLR cable on specified output
     
  • Item Includes:

    • 1x Rupert Neve Designs 5025 19-Inch Rackmount Dual Shelford Microphone Preamplifier
    • Please Note: PS121PH power supply sold separately
     
  • GTIN:

    0763854076804
     

5025 - Required Accessories

    California Residents:
    WARNING:
    Cancer and Reproductive Harm - www.P65Warnings.ca.gov