Pro-Ject Tube Box S2

799.00

Tube phono-preamplifier

Innovative miniature sized phono preamplifier with tube output and high end sound!

Tube Box S2 is our very first product to feature a fully discreet circuit design without using any operational amplifiers (OpAmps). It also is the first product to come with replaceable tubes for tube rolling and sound-shaping. This gives the customers many options to pick from and alter the sound signature to their preferences. Tube Box S2 will give a full and relaxed laid back sound with lush mids, just like you would expect it from a much bigger high end tube phono pre-amplifier. It offers support for both MM and MC cartridges and comes with many gain settings to be switched on the front panel. Five variable input impedance settings are available to adjust to any MM cartridge, the 47k ohm input impedance setting is fixed and suited for high output MC cartridges. The aluminium/metal casing is adapted to our DS2 line in looks and protects against vibrations and electromagnetic interferences for superior sound.

Compatible upgrade power supply: Accu Box S2

Features

  • Suitable for MM and MC cartridges
  • Precise RIAA equalisation in two parts, passive/active
  • Fully discreet circuit design without OpAmps
  • 2x ECC83 tubes (replaceable)
  • Front-sided Subsonic filter button
  • Front-sided Gain control
  • Ultra low noise circuitry with FET input stage
  • Dual mono circuitry for optimized channel separation
  • Polystyrene capacitors used where possible
  • Gold-plated RCA in- and outputs
  • External power adaptor and multiple internal power supplies
  • Well-filtrated high-voltage anode power supply
  • Sandwich alu/metal casing protects from vibrations and electromagnetic interference
  • Available in silver or black

Technical Specifications

Tubes 2 x ECC83 (12AX 7A)
Input impedance 10 ohms, 100 ohms, 1 kohm, 2 kohms
Input capacitance/impedance 47pF, 147pF, 267pF, 367 pF, 487 pF and 587 pF* / 47 kohms, Together with other input impedance settings without any influence!
Input gain 40 dB, 43 dB / 50 dB, 60 dB und 63 dB
Noise floor 80 dB (A weighted) at 40 dB input gain, 75dB (A weighted) at 50 dB and 63 dB input gain
THD <0.02% at 40 dB input gain <0.05% at 50 dB and 63 dB input gain
RIAA-equalisation curve accuracy +/- 0.4 dB/20 Hz – 20 kHz
Subsonic filter at 20 Hz with 18 dB/octave
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 470 mA DC, <1W in standby
Dimensions W x H x D with sockets 103 x 73 x 131 mm
Weight 410 g without power supply

Downloads

Manual [pdf]

Reviews

Colin Holter finds The Tube Box S2 hits a sweet spot

USA, 03.2020

… This pre-amp sounds great right out of the box. Music played through this preamp sounds rich and full …

… stepping up to a high-quality pre-amp like this can definitely make an impact …

WATCH THE VIDEO: https://www.youtube.com/watch?v=qseEuSu4J20

Review

 


Stereoplay reviews the Tube Box S2

DE, 03.2018:
Value blast! Flexible adjustable phono stage with interchangeable tubes. Doesn`t softer, but excites with a dynamic, punchy sound and great spatial representation.

 

 

 

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