Pre Box RS

Technical Specification

Tube assembly

  • 2x ECC88 (6922)

Frequency response

  • 20 Hz - 50 kHz (+ 0dB/- 0,08 dB)

Signal to noise ratio

  • 95 dBA


  • 0,06%

Line-level inputs

  • 3 pairs XLR & 3 pairs RCA/phono sockets

Input impedance

  • 150k Ohms


  • 18 dB (XLR)


  • 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


  • W x H x D206 x 72 x 210 mm, with sockets


  • 1950 g without power supply

Overview & Features

High-end stereo line tube-preamplifier

Ultimate high-end sound with 3 XLR & 3 RCA line inputs!

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.

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, 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.


  • 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 Preā€“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

Project Pre Box RS

Pre Amplifier

Midland HiFi Studio - Key Information

"Under Construction.

Text Coming soon."

Midland HiFi Logo
Find us on Facebook