Our precision Tube Box DS2 phono preamplifier benefits from outstanding circuitry design by the brilliant Czech engineer, Dr. Bohumil Sykora. Compatible with most MM & MC cartridges on the market, it offers two turntable inputs so enthusiasts can easily toggle between two different turntable/cartridge combos. Continuously adjustable (‘on-the-fly’) input impedance for low output MC cartridges is a must-have feature that allows you to ‘tune’ the loading to achieve the sonics that best suit your system and your ears. Other features include input capacitance for MM cartridges and a switchable subsonic filter to stave off mechanical noise. All components including the tube output stage and polypropylene capacitors are audiophile-grade and guarantee a breathtaking sonic experience.

Additional information
Weight 1.5 kg
Dimensions 22.7 × 20.6 × 9.1 cm



  • Suitable for MM and MC cartridges
  • Precise RIAA equalisation
  • Ultra low noise circuitry
  • Selection between 2 phono inputs & 2 line outputs
  • Dual mono circuitry for optimized channel separation
  • Selectable input impedance (for MC: fixed or variable)
  • Selectable input capacitance (for MM)
  • Selectable subsonic filter
  • Gold-plated RCA in & outputs
  • Sandwich alu/metal casing protects from vibrations and electromagnetic interference
  • Finishes: silver or black, with/without wooden side panels
  • Handmade in Europe


  • Tubes: 2 x ECC83 (12AX 7A)
  • Input impedance: variable 10-1000 ohms/ 47.000 ohms (47kΩ)
  • Input capacitance : 47pF, 147pF, 267pF, 367pF
  • Gain: 40, 45, 50, 60 and 65 dB (switchable)
  • Output voltage typically: 500 mV/1kHz at 5mV/1kHz (at 40dB)
  • Noise floor: 88 dB (A weighted, at 40dB gain)
  • THD: <0,04 %
  • RIAA-equalisation curve accuracy: 20 Hz – 20 kHz / +0,2dB / -0,2dB
  • Input: 2 pairs RCA/phono sockets
  • Line-level output: 2 pairs RCA/phono sockets
  • Outboard power supply: 18 V/1000 mA DC
  • Power consumption: 490mA DC, <0,5W in standby


“In the Tube Box DS2, Pro-Ject has engineered a versatile phono preamp that can be fine-tuned to suit any listener’s preference. It could play with enchanting transparency, and with bass reproduction that was an accurate representation of what was on the LP. Its soundstaging was exceptional, creating greater space behind and around instruments, and moving voices to the front of the stage.” – Jeff Stockton, Soundstage! Access

“An absolute knock-out” – Ken Kessler, HiFi News