Pro-Ject Pre Box RS2 Digital Preamp

Unit has been lightly used since July 2023. Very few hours. In exceptional condition. This unit also has a switchable tubed preamp section. Comes with upgraded electo-harmonix EH 6922 gold pin tubes x4 from Upscale Audio (original tubes included as well). Also, includes Pro-ject Control It DS/RS Remote Control Unit.

• Frequency response: 20Hz – 20kHz (-0,3dB, -2,5dB)
• Output voltage: 2,0V RMS – 0dBFS on digital inputs /RCA output, 4,0V RMS – 0dBFS on digital inputs /XLR output
• Sampling rates: 32/44,1/48/88,2/96/176,4/192/352,8/384/705,6/768 kHz
• DSD support: DSD64, DSD128, DSD256 and DSD512 (DoP, DSD512 native)
• MQA support: full MQA unfolding by hardware for all digital inputs
• Dynamic Range: 124dBA
• Channel separation: > -117dB at 10kHz@0dB
• SNR (20Hz – 20kHz): > 113dB at 0dB
• THD: 0.005% solid state output/ 0.25% tube output
• THD (20Hz – 20kHz): < 0.0003% @ 0 dB, 2V RMS, 1 kHz
• THD+N (20Hz – 20kHz): < 0,0009%
• Analog input sensitivity: 350mV
• Line input impedance: 50kohms
• USB data transfer : Asynchronous , DSD DoP up to DSD512 support and PCM up to 32b/768kHz
• S/PDIF optical input: 2 x (24bit / 192kHz)
• S/PDIF coaxial input: 1 x (24bit / 192kHz)
• AES/EBU 1 x (24bit / 192kHz balanced)
• I²S: for connection with CD Box RS2 T using supplied HDMI cable
• Master clock output: 16.9344 MHz for CD Box RS2 T
• Digital to Analogue converter: 2 x ESS9038Q2M 32-bit (dual mono)
• Filter settings: 8x digital filter
• Bluetooth version: Fully embedded Bluetooth® v4.0
• Bluetooth music receiver codec: SBC, AAC, AptX
• Output buffer: discrete and balanced, tube and solid state
• Tubes: 4 x 6922EH
• Headphone amplifier: discrete
• Min. recommended impedance: 8 Ohm
• Headphone output power: 90 mW / 300 Ohm; 245 mW / 33 Ohm; 150 mW / 8 Ohm
• Display: 3,5” TFT module, 480×320, 360 cd/m2, contrast ratio 700, MVA technology
• Balanced analog input: 1 x XLR
• Unbalanced analog input: 1 x RCA
• Variable balanced analog output: 1 x XLR
• Variable unbalanced analog output: 1 x RCA
• Headphone output: 1 x 6.3mm stereo JACK
• Trigger sockets: 2 x 2,5mm 2-pole (1 x Trigger In, 1x Trigger Out)
• Outboard power supply: 20V/3A DC
• Power consumption: max. 1A DC, <0,5W in standby