Pro-Ject

Phono Box S2 Ultra

Pro-Ject is 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.

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$349.00
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  • Audiophile Performance
  • No Operational Amplifiers used
  • Audiophile-grade polystyrene capacitors
  • Precise split RIAA equalization
  • Switchable Subsonic filter –18 dB @ 20Hz
  • Switchable input impedance/capacitance
  • Six adjustable gain levels
  • Solid metal casing protects from interferences
  • Outstanding sound quality
  • Input impedance 10 Ohm/ 100 Ohm/1 kOhm / 47 kOhm
  • Input capacitance 100 pF/ 220 pF
  • Gain switch 40dB/43dB/50dB/53dB/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
More Information
Weight 2.00 lbs
Inputs 1 pair RCA/phono sockets
Total Harmonic Distortion <0,0005% MM, < 0,004% MC
Signal To Noise Ratio Signal / Noise ratio MM: 85dBV (90dBV - 'A' weighted)
Signal / Noise ratio MC: 65dBV (71dBV - 'A' weighted)
Gain 40 and 43dB / 60 and 63dB
Impedance 10, 100, 1k, 47k ohms / 100pF
Power Requirements 18 V / 80 mA
Features Adjustable Gain, Adjustable Loading, External Power Supply, MC Compatible, MM Compatible, Subsonic Filter
Product Manual Download
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