Pro-Ject Phono Box S2 Phono Preamp

Entry-level high-end classic · MM/MC dual purpose · Adjustable load · Dual mono design

The Pro-Ject Phono Box S2 is a comprehensive evolution of the classic Phono Box S, featuring a higher-quality aluminum/metal sandwich chassis, dual mono circuitry, and audiophile-grade components. It delivers more delicate details, better dynamics, and a more expansive soundstage. Supporting both MM and MC cartridges, and offering multiple gain, impedance, and capacitance adjustments, it can perfectly match most cartridges on the market.

Compact, exquisite, and flexibly configurable, it is a highly cost-effective phono stage choice for entry-level high-fidelity systems.

Basic Product Information

• Type: MM / MC Phono Preamplifier
• Supported Cartridges: MM (Moving Magnet) and MC (Moving Coil)
• Adjustment Method: Bottom DIP switches (gain, impedance, capacitance)
• Output: RCA Line-level output
• Color: Black or Silver
• Origin: Hand-made in Europe
• Accessories: External 18V DC power supply

Key Technology Highlights

• Dual Mono Design: Excellent channel separation and soundstage performance
• Audiophile-Grade Components: Audiophile-grade amplification modules + WIMA polypropylene capacitors
• Precise RIAA Equalization: 20Hz–20kHz with a maximum deviation of only 0.4dB
• Adjustable Gain: 40 / 43 / 60 / 63 dB, flexibly matching different output cartridges
• Adjustable Input Impedance and Capacitance: 10Ω / 100Ω / 1kΩ / 47kΩ; 100 / 200 / 320 / 420 pF
• Switchable Subsonic Filter: -12dB @ 20Hz, effectively suppressing turntable vibrations and warped record noise
• Aluminum/Metal Sandwich Chassis: Effectively shields electromagnetic interference and vibrations
• External Power Supply: Reduces internal interference, extremely low standby power consumption

Detailed Specifications

• Input Impedance: 10Ω / 100Ω / 1kΩ / 47kΩ
• Input Capacitance: 100 / 200 / 320 / 420 pF
• Gain: 40 / 43 / 60 / 63 dB
• Signal-to-Noise Ratio: 85 dB
• Total Harmonic Distortion: MM <0.01% ; MC <0.05%
• RIAA Accuracy: 20Hz–20kHz / max. 0.4dB
• Subsonic Filter: -12dB @ 20Hz
• Input / Output: 1 set of RCA each
• Power: External 18V / 500mA DC
• Power Consumption: Approx. 85mA (standby <1W)
• Dimensions: 103 × 36 × 115 mm
• Weight: Approx. 570g

Sound Quality and Performance

The Phono Box S2 delivers a clean, delicate, and dynamic sound. The background is quiet, details are rich, the mid-range is natural and full-bodied, the bass is powerful and controlled, and the treble is clear without being harsh. The soundstage is expansive, and the music presents a mature, easy-to-listen, and convincing performance.

Its adjustable load allows it to precisely match different cartridges, fully unleashing the potential of cartridges and records, making it a powerful phono stage for entry-level high-end systems.

Online Reviews

• StereoNET: "A genuine audio bargain... virtually unrivaled at this price point, highly recommended."
• Users and Media: Excellent detail and dynamics, high adjustability, exquisite craftsmanship, a successful evolution of the Phono Box S.
• Several reviewers confirm its "high-end performance within the entry-level," capable of significantly enhancing the musicality and resolution of vinyl systems.