Pro-Ject Pre Box RS Pre Amplifier
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 Pro-Ject Pre Box RS Pre AmplifierPro-Ject Pre Box RS Pre Amplifier 

Pro-Ject Pre Box RS Pre Amplifier

  (2 Reviews)
£657.50 Exc. VAT |  


Pro-Ject Pre Box RS Pre Amplifier

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 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 


Tubes: 2 x ECC88 (6922)
Frequency Response: 20Hz - 50kHz (0dB/0.08dB)
Noise Floor: 95dB (A Weighted)
THD: 0.06%
Gain: 12dB (18dB Using XLR Outputs)
Pre-Out: 1 Pair RCA/Phono Sockets (fixed)
1 Pair XLR Sockets
Line-Level Inputs: 2 Pairs RCA/Phono Sockets
4 Pairs XLR Sockets
Input Impedance: 150kohms (Ω)
Outboard PSU: 20V / 3A DC
Power Consumption: 700mA AC, <1W In Standby
Dimensions (W x H x D): 206 x 72 x 210mm (Incl. Sockets)
Weight: 1950g (Without PSU)
Average Rating (2 Reviews):  
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impressively transparent
15 October 2019  | 

I have this with the add-on power supply and improved cable. An upgrade to my system meant I needed to introduce a pre-amp between my Dac and my active speakers to improve impedance matching. This does the job very well without adding or subtracting anything - it is impressively transparent.

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2 of 2 people found this review helpful.

Part of Complete Upgrade
15 June 2015  | 

This is me two months into complete upgrade to the Pro-Ject "RS Line". I Purchased the mono amp boxes, pre-box, phono box, headbox and stream box.

Straight away the sound stage that was present by these little project boxes was very very impressive. With the valve stages there is a warm sound presented with lots of depth and detail which suits my listening preference to a "T". The build quality is excellent and the size was a big plus point from an aesthetics and space perspective.

There was "out of the box issue" with the Headbox but a quick email to the guys at Analogue Seduction and it was sorted straight away with an excellent no hassle/quibble replacement service. Great Service from the Analogue Seduction Team

I would have no reluctance in recommending the Pro-ject boxes to anyone. And anyone who has heard them is always left impressed. As I said, I am now 2 months in and they continue to surprise and delight.

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19 of 19 people found this review helpful.

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