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Chandler Limited REDD.47 Microphone Pre-amplifier  From Chandler

The unmistakeable, generation defining sound of the mid 60's era Abbey Road Studios reborn in a single mono channel pre-amp. From distinctively warm to aggressive and edgy. There's no mistaking why they call it the "Holy Grail".

Chandler Limited


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Chandler Limited REDD.47 Pre-Amp - Sound Samples: Volume One

These sound samples were recorded at the Chandler Limited® in-house recording studio using all Chandler Limited® REDD.47 Mic Amplifiers from the Chandler Limited® Abbey Road Studios / EMI product line. Drums: Nine REDD.47 Mic AmplifiersBass: Two REDD.47 Mic Amplifiers - Direct (signal split using a Little Labs REDEYE), one signal into a REDD.47, the other into an SVT Pre Amp followed by a REDD.47.Guitar: Two REDD.47 Mic Amplifiers - Direct, using one REDD.47 overdrive a second REDD.47 (like The Beatles' 'Revolution' guitar sound.)Chandler Limited’s REDD.47 microphone pre-amplifier is a recreation of the original valve line amplifiers used in Abbey Road Studios’ heralded and rare EMI REDD.51 recording consoles circa 1959-1968.The REDD.47 pre-amp lent its unmistakably punchy, aggressive character to Beatles recordings made at Abbey Road Studios' Studio Two during the 1964 to 1968 era.

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    • Chandler Limited REDD.47 Microphone Pre-amplifier

Manufacturer's Description from Chandler

Chandler Limited’s REDD.47 microphone pre-amplifier is a recreation of the original valve line amplifiers used in Abbey Road Studios’ heralded and rare EMI REDD.51 recording consoles circa 1959-1968.

Designed as a central component to the EMI REDD.51 recording console, the original REDD.47 line amplifier was used to amplify virtually every stage of the audio path (mic inputs, line inputs, echo sends and monitors).

The REDD.47 lent its unmistakably punchy, aggressive character to music recorded at Abbey Road Studios between 1964 and 1968, including many tracks by The Beatles.

The Chandler Limited REDD.47 pre-amp offers many additional benefits to the original design including increased gain, allowing a range of tonal options from pristine clean sound to classic rich, saturated tone with up to 2% harmonic distortion before clipping. The Chandler Limited REDD.47 pre-amp easily reproduces the distortions heard on The Beatles’ ‘Revolution.’

Chandler Limited’s REDD.47 tube microphone pre-amplifier delivers the legendary sound of Abbey Road Studios’ ‘Holy Grail’ pre-amp, with extra features to meet today’s recording studio standards.  

Chandler Limited

About Manufacturer

Re-creating some of the most sought after gear of the 60's and 70's, Chandler Limited has built some of the best gear in the land. Look to them for the "classic rock" and Metal sound used by some of yesterday's as well as today's best acts. Watch closely, because they continue to bring new products to market based on the legendary sounds of the past, and some that have a twist (or upgrade) of their very own. Chandler designs and releases some seriously well-built gear for the most discriminating (and famous), musicians, producers, and engineers.


  • Inputs: Mic/Line (Balanced XLR), D/I (1/4”)

  • Stepped gain: 6db increments

  • Fine gain: variable +/-5db

  • Total Gain: +57db

  • Output control: variable

  • Rumble filter: Inductor based, switchable (30,45,60,70,90,110,130,180hz)

  • PAD: 20db, switchable

  • Phase: switchable

  • Phantom Power: +48v, switchable

  • Tubes: EF86, E88CC (input/output)

  • Transformer balanced I/O (custom wound)

  • Internal power supply