Project Tube Box S2 Phono Preamplifier
Tube Box S2 is ProJect Audios 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 vinyl listener many options to pick from and alter the sound signature to their 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 to be switched on the front panel. Five variable input impedance settings are available to adjust to any MM cartridge, the 47k ohms input impedance setting is fixed and suited for high output MC cartridges. The aluminium/metal casing is adapted to their DS2 line in looks and protects against vibrations and electromagnetic interferences for superior sound.
The ProJect Tube Box S2 is a precision audio component where the internal architecture is totally double mono, which makes it possible to obtain a more precise stereo reproduction and soundstage. The RIAA correction is made around a double circuit. One part is active and the other is totally passive.“Fet” transistors dedicated to the input circuit have been chosen for their weak noise and absence of distortion. All the condensers are out of Styroflex technology. No chemical capacitance was used on the audio signal path.
The Pro-Ject Tube Box S2 phono preamplifier is powered by an external power supply which supplies a direct current of 18 V. There is no need of a rectifying circuit or filter circuit. However, several voltages are internally treated which are regulated for the different parts of the circuit.
Like its predecessor, the Tube Box S, there is a good timbre quality and definition. But the global transparency as well as the precision of the soundstage have been largely improved.This phono preamp demonstrates authority with a lot of nuances and finesse when it is necessary. There is no frustration nor any aggressiveness without any limits in the high spectrum. In terms of timber and harmony, the tubes perfectly play their parts without adding any coloration as this is often the case on this type of device.
A true high end solution in a much smaller package!
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 elec-tromagnetic interference
• Finishes: silver or black