Rupert Neve Designs 535

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500 series diode bridge compressor taking the original concept of the legendary Neve 2254 and updating to the requirements of modern productions. It boasts custom transformers and Class A amps.

At a glance

  • 500 Series compressor based on Rupert Neve's classic diode-bridge topologies
  • Updated, modern circuitry for state-of-the-art performance and increased versatility
  • Thick, punchy, and characterful signal enhancement
  • Slower TIMING settings produce more transparent-sounding results
  • BLEND control for onboard parallel compression
  • Sidechain highpass filter minimizes the negative influence of LF content
  • Stereo LINK switch utilizes the link buss built into many 500 Series chassis
  • Custom RND transformers and Class A output amplifiers
  • Stepped controls throughout for accuracy and repeatability
  • Precision LED level and gain-reduction meters
  • COMP IN switch for instant wet/dry comparison
  • Not standalone — requires compatible 500 Series chassis

The Rupert Neve Designs Shelford 535 is a single-channel 500 series compressor inspired by the same diode bridge principles found on the classic 2254. 

Overview

The Rupert Neve Designs Shelford 535 takes the soul of the legendary 2254 and updates it for modern requirements. It offers the larger-than-life compression of its ancestor and the precision and flexibility required by current workflows. 

Originally designed for the Shelford channel, the 535 has been adapted for the 500 series format and includes a custom transformer designed by Rupert Neve and a Class A output amplifier.

Rupert Neve Designs Shelford 535

The Rupert Neve Designs 535 offers quick and easy settings with a six selectable ratio ranging between 1.5:1 through 8:1 easily accessible via the rotary switch. 

The 31-step Threshold control ranges from -25dBu up to +20dBu. The Gain control offers gain compensation between -6dB and +20dB accessible through its 31-step switch.

A fixed 150Hz, 12dB/octa side-chain filter is also provided, allowing the compressor to respond less to powerful bass content avoiding unwanting triggering caused by low frequencies and keeping the compression clear.

Diode Bridge Compression

Diode Bridge compression works by using a diode’s non-linear properties to control the gain reduction.

Diode Bridge Compression was Rupert Neve’s way to create a colourful, weighty and punchy compressor before the advent of VCAs. Unlike VCA compression, which is usually thought of bringing clarity, diode bridge provides a weighty and harmonically rich tone, effortlessly bringing the source forward in the mix.

Circumventing the natural distortion levels of diodes by configuring it in a bridge format, Rupert Neve originally came up with the 2252 compressor which then evolved into the revered 2254.

The Rupert Neve Designs 535 has been meticulously designed to recreate the unique tone of the 2254 but with a much-improved noise floor. They are particularly well suited for bringing vocals, electric guitars, bass and drums at the front of the mix. 

Flexible Timing

The 535 compressor includes six selectable Timing settings that control both the attack and release times simultaneously. Each of these settings has been carefully chosen for different applications. 

FAST: Fast Attack (750µs), Fast Release (130ms)
MF: Medium Attack (2.25ms), Fast Release (130ms)
MED: Medium Attack (2.25ms), Medium Release (400ms)
MS: Medium Attack (4ms), Slow Release (725ms)
SLOW: Slow Attack (10ms), Slow Release (1s)
AUTO: Medium Attack (5ms), Dual-decay Release (T1 500ms, T2 1s)

Both FAST and MF settings are ideal to clamp down on transient rich material like drums or acoustic guitars. MED and MS settings offer slower reactions (slower attack and release times) for vocals, guitars while the Slow and AUTO provide smoother level control.

A FAST mode increases the speed of both attacks and release times dramatically for each setting, increasing the number of time constants from six to 12. Faster modes will also increase harmonic distortion, adding noticeable colouration to the sound. Slower modes will result in more transparent compression.

The attack and release on diode bridge compressors vary slightly depending on the ratio, threshold and incoming audio, resulting in dynamically shifting timing and harmonic content. It is an integral part of the diode bridge compressor’s sound.

A Flexible Compressor 

Rupert Neve Designs 535 Blend

The Shelford 535’s obvious colouration might prove too much on some occasions and, as a result, it includes a Blend control which lets you dial in the amount of compression to your dry, unprocessed signal. This feature might be desirable to reinject some transients lost in fast settings while retaining some of the character and punch of the compression, or simply creating a natural sound with controlled dynamics. 

Two 535 can be used together for stereo operations thanks to the included LINK button if your 500- series rack features a link control. It works by sending a control voltage via a Sidechain input so that both units are triggered equally at the incoming audio

More Information
AT A GLANCE
  • 500 Series compressor based on Rupert Neve's classic diode-bridge topologies
  • Updated, modern circuitry for state-of-the-art performance and increased versatility
  • Thick, punchy, and characterful signal enhancement
  • Slower TIMING settings produce more transparent-sounding results
  • BLEND control for onboard parallel compression
  • Sidechain highpass filter minimizes the negative influence of LF content
  • Stereo LINK switch utilizes the link buss built into many 500 Series chassis
  • Custom RND transformers and Class A output amplifiers
  • Stepped controls throughout for accuracy and repeatability
  • Precision LED level and gain-reduction meters
  • COMP IN switch for instant wet/dry comparison
  • Not standalone — requires compatible 500 Series chassis
Demo in StoreYes
ManufacturerRupert Neve Designs
KMR Audio Clip
Short Description500 series diode bridge compressor taking the original concept of the legendary Neve 2254 and updating to the requirements of modern productions. It boasts custom transformers and Class A amps.
Dynamics TypeCompressor
Compression TypeN/A
Side Chain InputNo
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