Rupert Neve Designs 5025 Dual Shelford Mic Preamp

RND's 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, we are now offering the Shelford Dual Mic Pre: a two-channel version of their flagship preamplifier that has become an indispensable tool for countless engineers and musicians. The Shelford Dual Mic Pre offers the sonic excellence of two Rupert Neve Designs 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.

Over fifty years in the making, the Shelford mic preamp is the definitive evolution of the original technologies in Rupert's classic console modules. The Shelford Dual Mic Pre contains two of these preamps in a single rack space.

Like Rupert’s designs from his time in Little Shelford, the Shelford Dual Mic 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 Shelford Dual Mic 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.

The Silk & Texture circuit on the Shelford Dual 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.

When you apply SILK RED, you're enhancing harmonic content generated by the highs and high mids of your source. This adds a sparkly sheen to the top end, and is often ideal for sources including vocals, snare, strings, pianos, and other acoustic instruments.

With SILK BLUE, you're enhancing harmonics generated by the lows and low mids of your source. This tends to "beef up" a signal from the bottom up, making it a great choice for drums, bass guitars, heavy electric guitars, male vocals, and synthesizers.

Complementing the Silk circuit are the custom-designed output transformers, which use Rupert Neve Designs' distinctive dual output topology. These offer both Main (+26 dBu) and -6dB (+20 dBu) outputs, allowing the engineer to drive the preamps fully into classic transformer saturation without clipping converters and other devices later in the chain.