Pro Ject Tube Box S2 preamp Black

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

The 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 that comes with replaceable tubes for tube rolling and sound-shaping. This gives customers many options to pick from to alter the sound signature to their preference. Tube Box S2 will give a full and relaxed laid back sound with lush mids, just as you would expect from a much bigger high-end tube phono pre-amplifier. It also offers support for both MM and MC cartridges and comes with many gain settings to be switched on the front panel. The Five different variable 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 the DS2 line in looks and protects against vibrations and electromagnetic interferences to obtain a 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

Tubes2 x ECC83 (12AX 7A)

Input impedance10 ohms, 100 ohms, 1 kohm, 2 kohms

Input capacitance/impedance47pF, 147pF, 267pF, 367 pF, 487 pF and 587 pF* / 47 kohms, Together with other input impedance settings without any influence!

Input gain40 dB, 43 dB / 50 dB, 60 dB und 63 dB

Noise floor80 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 filterat 20 Hz with 18 dB/octave

Input1 pair RCA/phono sockets

Line-level output1 pair RCA/phono sockets

Outboard power supply18 V / 1.000 mA DC, suitable for your country’s mains supply

Power consumption470 mA DC, <1W in standby

Dimensions W x H x D with sockets103 x 73 x 131 mm

Weight410 g without power supply

Pro Ject Tube Box S2 preamp Black , pro, ject, project, pro-ject,box, s2, black, preamp. box, tube