Pro-Ject Tube Box S2 | Phono Preamp

Get High Fidelity Tube Smoothness, Great Looks, and MM/MC Support with Pro-Ject VC-S3

• Fully discrete, ultra-low noise circuitry for perfect sound reproduction
• Dual mono designed with user replaceable ECC83 tubes
• RIAA equalization with passive and active options
• Handmade in Europe

Sound that defies expectations

Tube Box S2 uses fully discrete circuitry – no operational amplifiers here (aka Op-Amps, used in simpler, more affordable designs but with some sacrifice to sound quality). The standard, user-replaceable tubes sound stellar out of the box, though the design opens the gates for sound-shaping via tube rolling should you want to take it a step further.

Tube Box S2’s sonic presentation is full & relaxed with a blossoming midrange more typical of much more expensive designs. The stage welcomes most MM & MC cartridges on the market with a wide range of gain, loading & capacitance settings. The S2 series’ 2-layer aluminum/steel enclosure shields the circuitry from vibration and electromagnetic interference for more music, less noise.

Specifications

General

• Weight: 1 lb
• Dimensions: 5.2″ x 4″ x 2.9″
• Tube Box S2 Full User Manual
• Pro-Ject 2 Year Warranty

Phonostage

• Tubes: (x2) ECC83 (12AX 7A)
• Input impedance: 10Ω, 100Ω, 1kΩ, 2kΩ A
• Input capacitance/impedance: 47pF, 147pF, 267pF, 367pF, 487pF and 587pF/47kΩ B (Input capacitance is irrelevant for low output MC cartridges)
• Input gain: 40dB,43dB B ; 50dB, 53dB and 60dB, 63dB A
• Noise floor: 80dB (A weighted) at 40dB input gain 75dB (A weighted) at 50 dB and 63dB input gain
• THD: <0.02% at 40dB input gain <0.05% at 50dB and 63dB input gain
• RIAA-equalisation curve accuracy: 20Hz – 20kHz / max. 0.4dB
• Subsonic filter: at 20Hz with 18dB/octave
• Input: 1 pair RCA/phono sockets
• Line-level output: 1 pair RCA/phono sockets
• Outboard power supply: 18V/1.000mA DC, suitable for your country’s mains supply
• Power consumption: 470mA DC, <1W in standby
• A: typical for low output MC cartridges
• B: typical for MM cartridges or high output MC