Pro-Ject DAC Box RS Final edition 2025

Classic High-End Pro-Ject DAC with exclusive modifications

The Final Edition includes two specially selected and matched diamond ECC88 high-end tubes, with an SRP of €199 per piece. These tubes elevate the audio performance even further, making the DAC Box RS the ultimate high-end bargain! Other electrical components have been meticulously selected so that only the best are used in the DAC Box RS Final Edition and the internal wiring has been improved.

The DAC Box RS is a reference-class D/A converter for digital stereo sources, designed for audiophiles who demand top-tier performance. It serves as a high-quality USB audio interface for HD computer audio and supports various inputs, including I²S with Master Clock, AES/EBU, optical, and coaxial.

With full DSD capability (up to DSD128) and support for 24/192kHz HD audio on all inputs (96/24 for optical), it ensures exceptional sound quality. The DAC Box RS features two premium PCM 1792 DAC chips and offers selectable digital filters to match your sound preferences.

Choose between a warm, relaxed tube output or a detailed, dynamic solid-state Class A output to suit your taste and music style. Its ultra-low noise, ultra-linear design, and low output impedance ensure a clean, interference-free signal.

Features

• Selected Diamond ECC88 high-end tubes
• Selected components & improved internal wiring
• Double top grade PCM-1792 D/A chip from Texas Instruments
• 9 Inputs: USB, AES-EBU, optical (Toslink), coax (S/PDIF)
• 24bit/192kHz asynchronous USB (XMOS technology)
• DSD (up to DSD128) capability (DSD over PCM)
• I²S interface for CD Box RS (sonic2data transfer technology) with additional clock synchronisation port (BNC)
• 2 selectable digital filter settings
• Fully balanced analogue audio circuitry
• Tube output stage & solid-state output stage (switchable)
• Ultra linear & ultra low noise circuitry
• IR remote control included
• XLR & RCA line level output sockets
• DC power supply (< 1 watt standby power)
• Full metal casing in silver or black

D/A-converter	2 x Texas Instruments PCM-1792 8 x Oversampling design
Sampling rates	32 / 44,1 / 48 / 88,2 / 96 / 176,2 / 192 kHz (except optical up to 96kHz)
Selectable filter settings	„steep“ & „optimum phase“
Digital inputs	2 x coax (S/PDIF)
	4 x optical (Toslink®)
	1 x USB B
	1 x AES/EBU
	1 x I²S
Precision clock output	BNC (use with CD Box RS)
Frequency response	20Hz - 50kHz (+0/-1dB)
Output stages	ECC88 Diamond selection high-end tube and solid state (switchable)
Analogue out	RCA / Cinch & XLR
Output voltage	max 4V/ 2V (XLR/RCA) at 1k Hz
THD	0.005% solid state out
	0.25% tube out
Signal to noise ratio	100 dB
Power consumption	<1 watt standby, 800/300mA max (tube/solid)
Outboard Power supply	20V/3A DC (included)
Dimensions W x H x D	206 x 72 x 210 mm with sockets
Weight	1890g without power supply