Tube Box S2

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

REVIEW & AWARDS

Pro-Ject Tube Box S2 Phono Preamp Review - Read More

"The Pro-Ject Tube Box S2 phono preamp is a stellar performer, delivering warm, engaging, and detailed sound along with a versatile feature set. Its compatibility with both MM and MC cartridges and adjustable impedance and capacitance settings make it a strong contender in its price range. While it does come with a few drawbacks—limited tube rolling options, inconvenient dip switch adjustments, and a higher price point—the Tube Box S2 remains a top-notch choice for vinyl enthusiasts seeking a high-quality phono preamp to elevate their listening experience." - Rick Coste

Pro-Ject Tube Box DS2 Phono Preamplifier - Read More

"Here the verdict is a fait accompli as I have been using the Tube Box DS2 for over a year as my budget reference phono amp. It was enough that it handles two decks, has two outputs and adjustable loading to match any cartridge likely to cross my path. Above all, though, is the sublime valve-y sound: it's an absolute knock-out, even proving itself in an uber-high-end £100k system with a £10k MC. This is a killer. " - Ken Kessler  

SPECIFICATIONS