top of page

Want for more info? 
Contact our

expert sales team NOW!

email us via
this link  

0800 464 7274

 Pro-Ject PHONO BOX S2 Ultra 

Discrete MM/MC phono preamplifier


Phono Box S2 Ultra – Luxury and audiophilia combined!

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


We are offering a fully discrete, OpAmp less design, which enabled us to realize an incredibly harmonious sound. On top of leaving out operational amplifiers we 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.


Compatible upgrade power supply: Accu Box S2




  • 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
  • Available in silver or black

Pro-Ject PHONO BOX S2 Ultra

  • Input impedance 10 Ohm/ 100 Ohm/1 kOhm /47 kOhm
    Input capacitance 100 pF/ 220 pF
    Gain switch 40dB/43dB/60dB/63dB
    Subsonic switch -18 dB @ 20 Hz
    Signal-to-noise ratio 89 dB V (MM)
    THD 0.00052% 
    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 
    Colour silver or black 
    Weight 570 g without power supply
bottom of page