Pro-Ject Pre Box S2 Digital Edition 23 MQA DAC and Headphone Preamplifier
The Pro-Ject Pre Box S2 Digital Edition 23 is the highly anticipated evolution of an award-winning modern classic. Originally launched to critical acclaim, this refined 2023 edition rejuvenates the design with significant internal upgrades, including a newly redesigned master audio clock and an improved power supply for even lower noise and jitter. It remains a powerhouse of digital-to-analog conversion, featuring a dual-mono configuration with high-end ESS Sabre ESS9038Q2M DACs.
This compact micro-preamplifier is capable of handling virtually any high-resolution audio format, including PCM up to 32-bit/768kHz, DSD512, and full hardware MQA decoding. Whether used as a high-fidelity desktop headphone amplifier or as the digital heart of a larger hi-fi system, the Edition 23 delivers a smoother, more fluid soundstage with a focus on musical transparency and precise timing.
This item is available for local pickup. (Details) Authorized dealer. Sold with full warranty.
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Features:
- Dual Mono High-End ESS Sabre DACs: Features two ESS9038Q2M DAC chips in a dual-mono configuration, providing exceptional channel separation and a dynamic range of up to 124dB for pristine audio reproduction.
- Full MQA Hardware Decoding: Includes a dedicated 16-core XMOS processor for hardware-based MQA unfolding, ensuring you experience the full studio-quality resolution of MQA streams and files.
- Redesigned 2023 Master Audio Clock: The upgraded discrete audio master clock reduces phase noise and pushes jitter levels below 100 femtoseconds, outperforming many high-end standalone clock generators.
- Improved Class A Analog Output Stage: The new analog output stage, based on the SABRE9603Q, features a higher Class A operating current. This results in significantly lower distortion when using low-impedance headphones or driving long cable runs.
- Enhanced Power Supply Isolation: A redesigned internal power supply provides superior isolation from PC-USB power noise, ensuring a wide and flat output impedance across the entire frequency range.
- High-Resolution PCM and DSD Support: Ready for the future of digital audio with support for PCM files up to 768kHz and native DSD512 (via USB), as well as 24-bit/192kHz via Optical and Coaxial inputs.
- Switchable Digital Filters: Choose from 7 different selectable digital filters—including a proprietary "Optimum Transient" filter—to fine-tune the sonic character to your personal preference.
- Rigid Aluminum Housing: Handmade in Europe, the timeless "sandwich" chassis uses aluminum and steel to protect sensitive internal components from electromagnetic interference and mechanical vibrations.
Technical Specifications
- DAC Type: 2x ESS9038Q2M (32-bit)
- Digital Inputs: 1x USB (B), 1x Coaxial (RCA), 1x Optical (TOSLink)
- Analog Outputs: 1x RCA Variable Line Out, 1x 6.3mm Headphone Jack
- USB Support: Up to 32-bit/768kHz PCM, DSD512 (Native), MQA
- Optical/Coaxial Support: Up to 24-bit/192kHz PCM
- Frequency Response: 20Hz - 20kHz
- Total Harmonic Distortion (THD): 0.0003% @ 0dB, 2V RMS, 1kHz
- Dynamic Range: 124 dBA
- Headphone Output Power: 100mW @ 32 Ohms, 6.6mW @ 600 Ohms
- Power Consumption: 5V/1A DC (via Micro-USB)
- Dimensions (W x H x D): 103 x 37 x 122 mm
- Weight: 366 g (without power supply)
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