Pro-Ject Tube Box DS

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The ideal phono preamp for audiophiles

  • Pro-Ject designed the Tube Box DS for those of us who are picky about analog sound. This versatile vacuum tube phono preamp provides highly flexible options and settings for a wide range of phono cartridges ? from moving magnet, to high- or low-output moving coil ? to ensure top-notch performance that’s tuned perfectly for your system. It lets you make choices and customize your turntable setup.

High-quality sound you can custom-tune to match your gear

  • The secret to the Tube Box DS’s dramatic sound starts with its audiophile-grade circuitry. Its vacuum tube output stage delivers the kind of silky smooth texture and spaciousness that tubes are famous for. A continuously variable input impedance loading control on the front panel allows convenient adjustment for your low output MC cartridges to ensure a flat frequency response.

Need a cable?

  • This phono preamp does not come with an RCA cable to connect to your receiver or amp.


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Premium phono preamplifier with tube output and highend sound!

This precision tube phono preamplifier benefits from outstanding circuit technology from Dr. Sykora and uses ultimate components. For the first time a variable selection of input impedance for MC cartridges can be done while playing a record! Other features include input capacitance for MM cartridges and switchable subsonic, that prevents your amplifier and speakers of ultra low rumble below 20 Hz. All components including tube output and polypropylene capacitors are audiophile-grade and guarantee a breathtaking sound experience. A perfect upgrade for ambitious vinyl lovers!

Key Features

  • MM & MC support
  • Precise RIAA equalisation
  • Ultra low noise circuitry
  • ECC 83 tube output stage
  • Input impedance adjustment for low output MC on front
  • Input capacitance adjustment in 4 steps (MM & Hi-output MC)
  • Switchable subsonic filter
  • Gold plated RCA sockets
  • Metal casing protects against vibration and interference
  • DC power supply (< 1 watt standby power)
  • Front-sided On/Off switch


Weight 1100 g
Dimensions 156 × 103 × 72 mm

Receivers Amps Preamps

Tubes 2 x ECC83 (12AX 7A)
Input impedance, variable stepless 10 ohms – 1.000 ohms
Input capacitance/impedance 47 pF, 147 pF, 267 pF and 367 pF / 47 kohms
Input 1 pair RCA/phono sockets
Line-level output 1 pair RCA/phono sockets
Outboard power supply 18 V / 1.000 mA DC, suitable for your country’s mains supply
Power consumption 490 mA DC, <1 W in Stand-By

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