Chandler Limited Redd.47 Microphone Pre-Amp
Microphone Pre-amplifier

Alto Music awarded Dealer of the Year 2012!

Chandler Limited Redd.47 Microphone Pre-Amp

Microphone Pre-amplifier

Chandler Limited REDD.47 Microphone Pre-Amplifier

Chandler Limited’s REDD.47 Mic 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’ Studio Two between 1964 and 1968, including many tracks by The Beatles.

The Chandler Limited REDD.47 Mic Amplifier 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 preamp easily reproduces the distortions heard on The Beatles’ ‘Revolution.’

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

  • Stellar recreation of the original REDD.47 used in Abbey Road Studios on countless historic recordings
  • Maintains the punchy sound of it's predecessor while adding in new features to withstand the rigors of modern recording
  • Increased gain for a larger tonal range
  • Saturated tone up to 2% harmonic distortion before clipping
  • Easily reproduces distortions like those heard on the Beatles 'Revolution'
  • Has the ability to be used as a mic pre-amp, line amplifier as well as a D/I


  • CHANNELS: Mono
  • CIRCUIT: Tube (EF86, E88CC)
  • CONNECTIONS
  • Inputs: Mic/Line XLR (pin 2 hot), D/I (1/4”)
  • Output: XLR (pin 2 hot)
  • Transformer balanced I/O (custom wound)
  • CONTROLS
  • Voltage gain: Stepped 16-52db
  • 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
  • POWER: Internal power supply



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