The Pre Box RS2 Digital is the big brother to our award-winning and groundbreaking Pre Box S2 Digital. It uses the same excellent-sounding DAC chips as the S2 version, proving once again that the Pre Box S2 Digital was already at the top of the list of high-end DACs and absolutely unrivaled. Based on the same core design principles, the range of functions is expanded and taken to new heights. The result is a fantastic-sounding and very versatile box. The perfect partner for the crème de la crème of high-end amplifiers and speakers!

The Pre Box RS2 Digital is a DAC and preamplifier that uses a dual-mono configuration of ESS Sabre's top-class D/A converters. ESS9038Q2M chips offer the highest sound quality in affordably priced high-end circuits. Unlike most DACs in this price range, the Pre Box RS2 Digital includes two DACs and separate signal paths for the left and right channels. Thanks to these converters, the Pre Box RS2 Digital also supports files up to 32-bit / 768-kHz in PCM and DSD format (up to DSD512) via USB and covers all digital files you can buy or stream. The analog output is designed in solid state and high-quality tube technology. Thus, the customer can choose which of the options is preferred.

The Pre-Box has eight digital filters. One of them is the proprietary Optimal Transient Digital Filter from the MQA developers. With these filters, the listener can adapt the sound to their own preferences.
Pre Box RS2 Digital comes with full HW and SW support for MQA (Master Quality Authenticated) technology. In the Pre-Box, the USB input signal is processed by a powerful multi-core XMOS microcontroller with advanced multi-core RISC architecture. For re-clocking, Altera's CPLD MAX II (Complex Programmable Logic Device) chip is used, which, together with the XMOS microcontroller, enables high-quality processing of both classic and MQA technology. For optimal use of this technology, it is best to connect the Pre Box to our Stream Box S2 Ultra in conjunction with the TIDAL service. You can also enjoy MQA quality by connecting it to our new revolutionary CD transport system, the CD-Box RS2 T. The CD-Box RS2 T can be connected to the Pre-Box RS2 Digital via a reliable I²S differential bus, which also provides the master clock (16.9344 MHz).

The headphone amplifier is the ultimate design. No compromise. No coupling capacitors. Not even at the output. The entire amplifier is DC-coupled. A very fast DC servo ensures that there is no DC voltage at the output. The output power is suitable for all types of headphones.

A premium full-aluminum remote control is included in the packaging, and the Pre Box RS2 Digital is available in a high-quality silver or black aluminum housing. All relevant information is displayed clearly, concisely, and structured on the large display on the front. Navigating the menu is very responsive and allows you to set up the device to your liking in seconds!

Special Features

Dual Mono DACs: 2x ESS9038Q2M
High-quality, optionally selectable upsampling of PCM and/or MQA content with proprietary filtering
Advanced re-clocking via new XMOS chip with multi-core RISC architecture
9 digital inputs: i²S, AES/EBU, Toslink, S/PDIF coaxial, Bluetooth v4.0
Analog: Pre-out XLR/RCA/Headphone, RCA input
Fully balanced dual-mono design
Output switchable between 6922 tube & Solid State
Ultra-linear and extremely low-noise
New high-quality display with intuitive and fast UI design
High-quality full aluminum remote control included

Technical Details

D/A Converter
2x ESS9038Q2M (Dual-Mono - 32bit/768kHz/)

Digital Inputs
1 x USB 2.0 Audio 32/768 + DoP and Native-DSD up to DSD512
1 x I2S for CD Box RS2 T
2 x S/PDIF optical 24/192
1 x S/PDIF coaxial 24/192
1x AES/EBU balanced 24/192

MQA
Full MQA Unfolding in Hardware

Line-Level Input
1 pair RCA jacks
1 pair XLR jacks

Input Impedance
15 kOhm

Output Impedance
180Ohm Solid State, 220Ohm Tube

Analog Outputs
Pre-out (XLR & RCA)
Headphone (6.35mm)

Headphone Amplifier Power
90 mW / 300 Ohm; 245 mW / 32 Ohm; 150 mW / 8 Ohm

THD+N (20Hz - 20kHz)
< 0.006% Solid State/0.017% Tube @ 2V RMS, 1 kHz

Masterclock
16.9344MHz for CD Box RS2 T

Bluetooth Version
Fully embedded Bluetooth® v4.0

Bluetooth Codecs
SBC, AAC, AptX

Output Buffer
Discrete and balanced, tube and solid state tubes: 4 x 6922EH

Power Supply
20V/3A DC, 110-240V/50, 60 Hz

Power Consumption
max. 1.2A DC, <0.5W in Standby

Dimensions W x H x D (with sockets)
206 x 72 x 222 mm

Weight
1710 g without power supply

ATR - Audio Trade HiFi - Vertriebsgesellschaft mbH
Wallufer Straße 2, 65343 Eltville am Rhein, Germany
info@project-audio.com
https://www.project-audio.com/de/impressum/
+43 50443