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Highend phono preamplifier 


• MM & MC capable  

• True dual mono design  

• Balanced XLR & unbalanced RCA In & Outputs  

• Fully passive RIAA & DECCA equalisation  

• Unique continously variable input impedance loading,  

  matches every cartridge (adjustment even while playing)  

• RCA & XLR In & Out  

• Superior low noise / low distortion  

• Classy & elegant dip switches  

• DC power supply (< 1 watt standby power)  

• Metal casing protects against vibration and interference  

• Faceplate silver or black  


Reference class phono preamplifier with unique impedance control   

This ultra low noise and distortion preamplifier is made for the audio conniosseur and offers not only breathtaking performance but is capable to adapt to virtually any phono cartridge through variable impedance control. Impedance adjustment can be done while playback! Due to use of best parts, like SSM2019 from Analog Devices as input stages and Linear Technology LT1010 as high current buffer stage, Phono Box RS delivers ultra low levels of distortion and noise. Its very low output impedance makes it insensitive to selection of interconnect cables and lenghts.  

Fully passive RIAA and DECCA equalisation is selectable. Phono Box RS offers fully balanced circuitry and both XLR and RCA inputs and outputs. All in all vinyl playback will never have sounded as clear, detailed and smooth, than with this superlative phono stage!  


Technical data

Pro-Ject Phono Box RS

Input impedance

Fixed 10 ohms or 47kohms,


variable 10 - 1200 ohms

Load capacity switchable

100pF 200pF, 300pF, 420pF, 520pF

Output impedance

50 ohms

Gain, MM / MC

RCA: 40, 50, 60 dB


XLR: 46, 56, 66 dB

Signal to noise ratio

80dB (91dB - IEC -A)


< 0,019%

RIAA accuracy

within 0,3dB/20Hz - 20kHz


20Hz / - 12dB





Power supply

+2x 18V/300mA DC; 220 - 240V, 50Hz

Power consumption

150mA DC < 1 watt standby

dimensions W x H x D (T with sockets)

206 x 72 x 200 (210)mm


2000g without power supply


Shipping Weight 2.5000kg
Shipping Width 0.220m
Shipping Height 0.090m
Shipping Length 0.210m
1 Year

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