Phono Box Ultra 500 leads with its polished chrome-plated copper housing. Copper in particular is known for it’s protective properties against high-frequency interference, thus taking the S2 Series’ existing aluminum/steel chassis design to the next level. However, this is only the beginning. A fully discrete, Op-Amp-free design fosters sonics rarely found in this class. On top of omitting Op-Amps, the selected polystyrene capacitors (known among audiophiles as the ‘holy grail’ for phono preamplifiers) significantly contribute to Ultra 500’s vivid, convincing sound. With wide-ranging flexibility in gain, load & capacitance, it can handle with grace almost any cartridge you throw at it.

Limited Edition

Phono Box Ultra 500 commemorates Pro-Ject’s 500,000th phono preamp shipped. Not coincidentally, it was made in a limited production run of 500 pieces, making this a truly unique, celebratory offering that leaves little be desired sonically when considering the price.

Additional information
Weight 0.7 kg
Dimensions 11.9 × 10.3 × 3.7 cm


  • Limited, exclusive edition of 500 pieces
  • Audiophile performance
  • Chrome surface on copper chassis
  • No operational amplifiers used
  • Audiophile-grade polystyrene capacitors
  • Precise RIAA equalisation
  • Switchable Subsonic filter –18dB @ 20Hz
  • Switchable input impedance/capacitance
  • Four adjustable gain levels
  • Outstanding sound quality
  • Handmade in Europe


  • Input impedance: 10, 100, 1k, 47k ohms / 100pF
  • Input capacitance/impedance: 100pF, 200pF, 320pF and 420pF */47kohms B
  • Input gain: 40 and 43dB B / 60 and 63dB A
  • Signal / Noise ratio MM: 85dBV (90dBV – ‘A’ weighted)
  • Signal / Noise ratio MC: 65dBV (71dBV – ‘A’ weighted)
  • THD: <0,0005% MM, < 0,004% MC
  • RIAA-equalization curve accuracy: <0,4dB / 20Hz – 20kHz
  • Subsonic filter: at 20Hz with 18dB/octave
  • Input: 1 pair RCA/phono sockets
  • Line-level output: 1 pair RCA/phono sockets
  • Power supply DC: 18V/500mA
  • Power consumption: 18V/80mA DC

A: typical for low output MC cartridges, B: typical for MM cartridges or high output MC
*Input capacitance is irrelevant for low output MC cartridges.


“The 500 has done an amazing job…I love good audio gear and Pro-Ject makes some of the best.” – John Biggs, Knapsack

“The Pro-Ject Phono Box Ultra 500 is certainly a solid choice” – Brad Moon, Forbes

“I can’t imagine something in this price imagine something in this price range delivering more” – Jeff Dorgay, ToneAudio