Pro-Ject Pre Box RS - Stereo Line Tube Pre-Amp


In Stock

Colour: Silver

  • Silver
  • Black
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Product Details

The Pro-Ject Pre Box RS offers 3-dimensional sound-staging, perfect micro dynamics and ultimate resolution combined with flexibility to use XLR and RCA sources. Perfectly combined with Pro-Ject Amp Box RS amplifiers, the Pre Box RS will give pure sound experience, that the real audiophile is looking for. Pre Box RS utilises a luxury casing, that is available in silver or black finish.

Four specific characteristics make this a true high-end preamplifier:

  1. Fully balanced double mono design
  2. Class-A circuitry with no negative feedback
  3. Tube output stage
  4. Separate power supply as an upgrade option for further improved sound quality.


  • Fully balanced double mono design
  • Ultra-linear and ultra low noise
  • Pure Class A circuitry
  • Input switching via relais
  • Low ESR capacitors
  • Blue Alps volume control
  • 3 XLR & 3 RCA inputs
  • 1 Pre–out XLR & 1 Record-out RCA
  • DC power supply (< 1 watt standby power)
  • IR remote control included
  • Metal casing protects against vibration and interference
  • Available in black and silver

Technical Specifications

  • Tube assembly: 2x ECC88 (6922)
  • Frequency response: 20 Hz - 50 kHz (+ 0dB/- 0,08 dB)
  • Signal to noise ratio: 95 dBA
  • THD: 0.06%
  • Line-level inputs: 3 pairs XLR & 3 pairs RCA/phono sockets
  • Input impedance: 150k Ohms
  • Gain: 18 dB (XLR)
  • Outputs: 1 Pre-Out (XLR), 1x Rec-Out (RCA)
  • Outboard power supply: 18 V/1 A DC, suitable for your country's mains supply
  • Power consumption: typical 700 mA / < 1 Watt standby
  • Dimensions W x H x D: 206 x 72 x 210 mm, with sockets
  • Weight: 1950 g without power supply

Further Information

Pro-Ject Pre Box RS - Stereo Line Tube Pre-Amp - User Manual

Pro-Ject Pre Box RS - Stereo Line Tube Pre-Amp - Product Information


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