Pro-Ject Tube Box S2

MM/MC Tube Phono-Preamplifier

Item #PRO:TUBEBOXS2
Pro-Ject

Pro-Ject Tube Box S2

MM/MC Tube Phono-Preamplifier

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Overview

Tube Box S2 is Pro-Ject's 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 provides the listener many options to pick from and gives them the ability to alter the sound signature to his/her preference. 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 that can be switched via the front panel. Five variable input impedance settings are available to adjust to any MM cartridge, while the 47k ohms input impedance setting is fixed and suited for high output MC cartridges. The aluminum/metal casing is adapted to the DS2 line in looks and protects against vibrations and electromagnetic interferences for superior sound.

A true high end solution in a much smaller package!

  • Suitable for MM and MC cartridges
  • Precise RIAA equalization 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 aluminum/metal casing protects from vibrations and electromagnetic interference
  • Available in silver or black
Details & Specs
More Information
Inputs 1 pair RCA / phono sockets
Outputs 1 pair RCA / phono sockets
Total Harmonic Distortion < 0.02% at 40 dB Input Gain; < 0.05% at 50 dB and 63 dB Input Gain
Gain 40 / 43 / 50 / 53 / 60 / 63 dB
Impedance 10 Ohms / 100 Ohms / 1 kohm / 2 kohms
Noise Floor (MM) 80 dB (A weighted) at 40 dB Input Gain; 75dB (A weighted) at 50 dB and 63 dB Input Gain
RIAA Equalization Curve Accuracy Deviation max. 0.4 dB / 20 Hz - 20 kHz
Power Requirements 470 mA DC, <1W in standby
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