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Pro-Ject Phono Box Black Preamplifier
Pro-Ject Phono Box Black Preamplifier 0
Pro-Ject Phono Box Black Preamplifier 1

Pro-Ject Phono Box Black Preamplifier

Model #: Phono Box RS-BL
At a Glance
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!
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Get to know this product.

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 lengths.

Fully passive RIAA and DECCA equalization 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!


  • MM & MC capable
  • True dual mono design
  • Balanced XLR & unbalanced RCA In & Outputs
  • Fully passive RIAA & DECCA equalization
  • Unique continuously 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
  • Available in silver or black
Useful Documents

Technical Specifications

Input ImpedanceFixed 10 Ohms or 47kOhms; Variable 10 - 1200 Ohms
Load Capacity Switchable100pF, 200pF, 300pF, 420pF, 520pF
Output Impedance50 Ohms
Gain, MM/MCRCA: 40, 50, 60 dB, XLR: 46, 56, 66 dB
Signal To Noise Ratio91 dBA
RIAA AccuracyWithin 0.3dB/20Hz - 20kHz
Subsonic20Hz / - 12 dB
InputsRCA & XLR
OutputsRCA & XLR
Power Supply2 x 18V/300mA DC; 220 - 240V, 50Hz
Power Consumption150mA DC < 1 watt standby
Dimensions W x H x D (with sockets)206 x 72 x 210 mm
Weight2000 g without power supply

Misc. Specs

Product Weight (lbs.)4.41
Depth (in.)7.87
Width (in.)8.11
Height (in.)2.83
Analog Audio(RCA) Input1
WarningProposition 65 Warning for California Residents