Phono Box RS
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Project Phono Box RS

Phono Stage

Midland HiFi Studio - Key Information



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Overview & Features


Highend phono preamplifier


 

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!

 

Features


  • 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 switched
  • DC power supply (< 1 watt standby power)
  • Metal casing protects against vibration and interference
  • Available in silver or black

Technical Specification


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:

  • 91 dBA

 

THD:

  • 0.019%

 

RIAA accuracy:

  • within 0.3dB/20Hz - 20kHz

 

SubsonIc: 

  • 20Hz / - 12 dB

 

Inputs: 

  • RCA & XLR

 

Outputs: 

  • RCA & XLR

 

Power supply: 

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

 

Power consumption: 

  • 150mA DC < 1 watt standby

 

Dimensions W x H x D (with sockets): 

  • 206 x 72 x 210 mm

 

Weight: 

  • 2000 g without power supply