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Pro-Ject RS Line Pre Box Black Preamplifier
Pro-Ject RS Line Pre Box Black Preamplifier 0
Pro-Ject RS Line Pre Box Black Preamplifier 1

Pro-Ject RS Line Pre Box Black Preamplifier

Model #: Pre Box RS-BL
At a Glance
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.
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$99,999.00Save $NaN

Get to know this product.

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 utilizes 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 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
Useful Documents

Technical Specifications

Tube Assembly2x ECC88 (6922)
Frequency Response20 Hz - 50 kHz (+ 0dB/- 0.08 dB)
Signal To Noise Ratio95 dBA
Line-Level Inputs3 pairs XLR & 3 pairs RCA/phono sockets
Input Impedance150k Ohms
Gain18 dB (XLR)
Outputs1 Pre-Out (XLR), 1x Rec-Out (RCA)
Outboard Power Supply18 V/1 A DC, suitable for your country's mains supply
Power ConsumptionTypical 700 mA / < 1 Watt standby
Dimensions W x H x D206 x 72 x 210 mm, with sockets
Weight1950 g without power supply

Misc. Specs

Product Weight (lbs.)4.3
Depth (in.)8.27
Width (in.)8.11
Height (in.)2.83
Analog Audio(RCA) Input3
WarningProposition 65 Warning for California Residents