Pro-Ject Phono Box S2 Ultra

PRO-JECT PHONO BOX S2 ULTRA – DISCREET DESIGN, HIGH ANALOG PERFORMANCE

Phono Box S2 Ultra is a phono stage that sets new standards in its price class. Inspired by the critically acclaimed Phono Box Ultra 500, Pro-Ject has taken the same uncompromising analog design and made it part of its S2 series. The result is a discreet MM/MC preamplifier that combines true high-end sound with a compact and elegant solid-metal chassis, designed to shield effectively against electrical interference.

This is a phono stage for vinyl enthusiasts who want a natural, harmonious, and detailed soundstage – without paying high-end prices.

HIGHLIGHTS

• Discrete, op-amp-free design for maximum musicality
• Polystyrene capacitors – the “holy grail” in audiophile phono stages
• Precise split RIAA equalization with extreme accuracy
• Selectable subsonic filter with –18 dB at 20 Hz
• Adjustable input impedance and capacitance
• Four gain levels for both MM and MC
• Solid metal chassis for effective shielding
• Available in black or silver

DISCRETE DESIGN WITHOUT OP_AMPS – PURE, ORGANIC SOUND

Phono Box S2 Ultra is built entirely without operational amplifiers – a rarity in this price class. Instead, Pro-Ject uses a fully discrete design, where every component choice has been made with a focus on signal purity and musicality.

The polystyrene capacitors, which are known among audiophiles for their incredible stability and low dielectric losses, give the phono stage a smooth, natural, and harmonious character. Together with the discrete construction, this creates a soundstage with warmth, clarity, and impressive dynamics.

SPLIT RIAA – ABSOLUTE TOP-CLASS PRECISION

One of the most advanced features of the Phono Box S2 Ultra is the split-based RIAA equalization, which delivers extremely precise reproduction of the RIAA curve – something even expensive competitors often do not offer. This solution corrects both the low and high frequencies separately, resulting in a more linear, balanced, and open soundstage.

In addition, the S2 Ultra offers four gain stages, so both MM and MC cartridges can be matched perfectly. Input impedance and capacitance can likewise be adjusted, making it compatible with everything from classic MM cartridges to low-output MC systems.

REMOVES NOISE, HIGHLIGHTS THE MUSIC

The solid metal chassis acts as effective electrical shielding, reducing noise and interference from the surroundings. The optional subsonic filter at –18 dB/20 Hz helps eliminate low-frequency rumble from uneven records or mechanical resonances, delivering more controlled and detailed bass reproduction.

For those who want the ultimate silent background and even greater microdynamics, the Phono Box S2 Ultra can be upgraded with Pro-Ject’s Accu Box S2 battery power supply, which further reduces electrical noise.

COMPACT, ELEGANT, AND AUDIOPHILE INSIDE AND OUT

Pro-Ject Phono Box S2 Ultra combines advanced analog engineering with a minimalist and timeless design. It is available in both black and silver, and its compact size makes it easy to integrate into any vinyl setup.

It is a phono stage that lifts even good turntables several levels – and reveals just how much musicality is hidden in the grooves when the electronics behind it are created with passion and precision.