Pro-Ject Phono Box S2 Ultra - Phono Preamplifier

Sale priceRs. 37,000

Tax included.


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Color: Black
  • Description
  • Specifications
  • Reviews



  • Audiophile Performance
  • No Operational Amplifiers used
  • Audiophile-grade polystyrene capacitors
  • Precise split RIAA equalisation
  • Switchable Subsonic filter –18 dB @ 20Hz
  • Switchable input impedance/capacitance
  • Four adjustable gain levels
  • Solid metal casing protects from interferences
  • Outstanding sound quality

Discrete MM/MC phono preamplifier

The Phono Box S2 Ultra is like no other phono preamplifier in its segment. The incredible success of Pro-Ject’s Phono Box Ultra 500, incited them to introduce this marvelously sounding phono preamp into Pro-Ject’s regular S2 line. The solid metal casing protects against interference and the internal design remains as spectacular as before.

Pro-Ject are offering a fully discrete, OpAmp less design, which enabled them to realize an incredibly harmonious sound. On top of leaving out operational amplifiers Pro-Ject decided to use polystyrene capacitors, which significantly contribute to the high end sound of the Phono Box S2 Ultra. These capacitors are known amongst audiophiles as the holy grail for phono preamplifiers. The split RIAA equalization enables a pin-point accurate representation of the RIAA curve, a luxury many other phono preamps do not possess.

Input impedance

10 Ohm/ 100 Ohm/1 kOhm / 47 kOhm

Input capacitance

100 pF/ 220 pF

Gain switch


Subsonic switch

-18 dB @ 20 Hz

Signal-to-noise ratio

89 dB V (MM)



RIAA accuracy

< 0.4 dB / 20 Hz - 20k Hz

In/Out sockets

1 pair RCA connectors

Power consumption

18 V / 80 mA

Outboard power supply

18 Volt DC/ 500 mA

Dimensions ( W x H x D )

103 x 37 x 119 mm


silver or black


570 g without power supply