Pro-Ject Pre Box RS Digital Pre Amplifier Silver - B Grade
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Pro-Ject Pre Box RS Digital Pre Amplifier Silver - B Grade

£533.33 Exc. VAT |  


Pro-Ject Pre Box RS Digital Pre Amplifier Silver - B Grade

Good condition. Tatty box.

The Pre Box RS Digital combines all the features of the DAC Box RS with selectable solid-state or tube output stages.

As in all of Pro-Ject’s top-class digital products, they use PCM1792 DAC chips from Texas Instruments, but a new feature in the Pre Box RS Digital is its dual chip mode to achieve ultimate fidelity. As a selectable feature a second DAC chip from Texas Instruments is on board, that can handle up to 32bit/384kHz.

Included on the Pre Box Digital RS is a headphone output with selectable impedances for perfect matching with your headphones. 

The Pre Box Digital RS offers 3-dimensional sound-staging, perfect micro dynamics and ultimate resolution combined with flexibility to use a wide range of digital and 1 analogue sound sources. 

Combined with the Pro-Ject CD Box RS the Pre Box RS Digital will give outstanding sound experience, because of a I²S connection provided via RJ45 that offers jitter-free disc playback. 

Key Features:

  • Switchable DAC chips: 2x PCM1792 or PCM5102 
  • 9 digital inputs: i²S, AES/EBU, Toslink, S/PDIF coax 
  • Analogue: Pre-out XLR/RCA/headphone, RCA input 
  • Headphone amp with adaptable output impedance 
  • Fully balanced double mono design 
  • Output stage switchable between 6922 tube & solid state 
  • Ultra-linear and ultra low noise 
  • Pure Class A circuitry 
  • Blue Alps volume control 
  • Standby-power consumption < 1W 
  • IR remote control included 


  • 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

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