Pro-Ject Phono Box RS2: balanced circuit with smooth impedance control and passive filters

Pro-Ject has released the flagship Phono Box RS2. According to the manufacturer, this is the most advanced of the 17 Pro-Ject phono stages.

According to the press release, the novelty has received a fully balanced discrete circuitry without the use of microcircuits in the analog path. It implements fully passive equalization of RIAA and DECCA curves for both MM and MC cartridges, which can be connected both in balanced and unbalanced versions to XLR or RCA connectors.

A wide range of amplification is combined in the Phono Box RS2 with the possibility of smooth adjustment of the load impedance. Using the potentiometer, you can adjust the impedance directly during playback, guided by the sound. In addition, a switchable adjustment of the channel balance by level within 2 dB is provided.

The Phono Box RS2 external linear power supply (also compatible with Pro-Ject turntables) features a low core saturation transformer with shielding between the primary and secondary windings. A special blocking circuit is responsible for the lack of saturation of the core with direct current.

The Phono Box RS2 is made of thick-walled aluminum plates fixed to a steel frame. Its design is designed to provide good rigidity and noise immunity.

The Phono Box RS2 in black or silver has already entered the European market for a price of 1,500 euros.