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Phono Box S2 Ultra Phono Preamp - Black

SKU eq-1634-ttlsf

high-end performance at affordable price, polystyrene capacitors
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Lab Overview


  • compact audiophile phono preamp compatible w/ moving magnet (MM) +Ā moving coil (MC) cartridges
  • discreet audiophile grade components + low noise circuitry
  • no operational amplifiers used, high end sound delivered byĀ polystyrene capacitors revered by audiophiles
  • precise split RIAA equalization
  • switchable impedanceĀ + capacitance settings for proper cartridge loading
  • four adjustable gain levels
  • switchable subsonic filter
  • high quality metal casing offers shielding from both vibration and electromagnetic interference
  • handmade in Europe
  • also available in silver

"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." - Pro-Ject


  • Input impedance:Ā 10 ohms, 100 ohms, 1 kohm,Ā 47 kohms
  • Input capacitance: 100 pF/ 200 pF
  • Gain switch:Ā 40 dB/ 43 dB/ 60 dB/ 63 dB
  • Subsonic switch:Ā -18 dB @ 20 Hz
  • SNR: 89dB (MM)
  • THD: 0.00052%
  • RIAA EQ Curve Accuracy: < 0.4 dB / 20 Hz - 20k Hz
  • Input/Output: RCA pair
  • Output Voltage: 18 V / 80 mA
  • Dimensions (WHD): 4.1" x 1.5" x 4.7" /Ā 103 x 37 x 119mm
  • Weight:Ā 1.2 lbsĀ /Ā 570 g (without psu)


  • power supply
UPC: 9120082382120

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