Match the Pre Box RS2 Digital with a suitable source component -- a CD transport such as the CD Box RS2 T or a network streamer like the Stream Box S2 Ultra, both from Pro-Ject -- and you have a fabulous, small-footprint digital front end for a pair of analog active speakers  or for a more conventional system comprising a power amp and passive speakers.-Soundstage

 There’s scale and solidity, plus an occasionally jaw-dropping openness, to recordings like this played through a DAC as accomplished as the Pro‑Ject - Gramophone

Digital connections to the hugely flexible Pre Box RS2 Digital DAC even include HDMI, with a synchronising clock. The latter also boasts Bluetooth, USB-B, coaxial and Toslink digital inputs, with a choice of solid-state and tube-based analogue outputs. With support for MQA and no fewer than seven digital filter options too, this combination delivers CD and hi-res digital audio sound in a range of delicious flavours – this is true audiophile performance, and supreme flexibility, EISA 2020 Winner Digital Source

High-end pre-amplifier, DAC, Headphone amp  The most universal & future-proof high end pre-amplifier, DAC, headphone amp!

Dual Mono DACs: 2x ESS9038Q2M
High Quality optionally selectable upsampling of PCM and/or MQA content with propriatory filtering
Advanced re-clocking powered by new XMOS chip with Mulit-Core RISC architecture
9 digital inputs: i²S HDMI, AES/EBU, Toslink, S/PDIF coax, Bluetooth v4.0
Analogue: Pre-out XLR/RCA/headphone, RCA input
Fully balanced double mono design
Output stage switchable between 6922 tube & solid state
Ultra-linear and ultra low noise
New high-quality display with responsive and fast UI design
High quality full Aluminium remote control included
Available in silver and black

The analog output is a buffer that is both solid state and high-quality tube. Thus, the customer can choose which of the option is preferred. The Pre Box has eight digital filters. One of them is the proprietary optimal transient digital filter from the MQA creators. With these filters, the listener can customize the sound to suit their own preferences. Pre Box RS2 Digital comes with full HW and SW support for MQA technology (Master Quality Authenticated).