Pro-Ject Prebox RS Digital

The ProJect 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 
Available in black and silver

Technical Data:

DAC: DAC 1 - 2 x PCM 1792 24/192
DAC 2 - PCM5102 32/384
Tubes: 6922 EH
Digital Outputs: 1 x USB 2.0 Audio 32/384 + DoP-DSD 64/128 
1 x RJ45 Sonic I2S for CD Box RS in Sonic Mode 
2 x S/PDIF 24/192
4 x S/PDIF Optical 24/96 
1x AES/EBU balanced 24/192 
Line Level Input: 1 RCA/Phono Sockets 
Frequency Response: 20Hz - 50kHz (0dB/0.1dB)
Signal To Noise: -100dB (IEC-A)
THD: Solid State: 0.005% 
Tube: 0.25%
Analogue Outputs: Pre-out (XLR & RCA)
Headphone (6.35mm Jack)
Input Impedance: 33kohms (O)
Headphone Impedance: 5 / 20 / 50 Ohms Switchable 
Outboard PSU: 20V / 3A DC
Power Consumption: Solid: 300mA 
Tube: 850mA 
Standby: 90mA