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Pro-ject Phono Box USB Pre-Amplifier


MM/MC Phono preamp with line & USB outputs

Phono Box USB: Top specialist for listening & recording of vinyl records!

Phono Box USB is an ideal phono preamplifier for both your hifi system and vinyl recording to PC or Mac. MM and MC cartridges will be welcome. The analogue output of Phono Box USB can easily be connected to a line-input (AUX,…) of your hifi and digitally via USB to your computer. Both outputs can be used simultaneously. Any professional recording software will give best results on Windows and Mac computer systems.


  • Preamplifier for MM or MC with switch on rear panel
  • Precise RIAA equalisation
  • High quality A/D conversion with USB out to PC/Mac
  • Compatible with Windows®, MacOS® & Linux
  • SMD technology for shortest signal paths
  • Output stage with ultra-low impedance
  • Gold-plated RCA sockets
  • DC power supply (< 1 watt standby power)
  • Faceplate available in black and silver

Technical Specifications

Load capacitance /impedanceMM: 47 KOhms / 120 pF MC: 100 ohms / 120 pF
Gain, MM40 dB
Output voltage typically300 mV / 1 kHz @ 3 mV /1 kHz (MM input)
Gain, MC60 dB
Gain, line level input11 dB
Max. output9,5 Vrms (1kHz)
Noise floor, MM94 dB (94 dB – A weighted)
Noise floor, MC75 dB (75 dB – A weighted)
THD, MM/ MC0.01% / 0.05%
RIAA-equalisation curve accuracy20 Hz – 20 kHz / max. 0.5 dB
Phono Input / line output1 Paar RCA Buchsen
A/D converter16-Bit Delta Sigma
Sampling rates32, 44,1, 48 kHz
USB outputdigital serial data protocol USB 1.1
Operating systemsWindows®, MacOS® & Linux
Standby power consumption< 1 Watt
Dimensions W x H x D (D with sockets)103 x 36 x 104 (115 mm with sockets)
Weight570 g


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