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Pro-Ject Tube Box S

£299.00

Tube phono-preamplifier

  • Improved version of the Phono Box S
  • Valve output adds more analogue warmth
  • Widely compatible with MM and MC cartridges

S-Line

The Tube Box S from Pro-Ject Audio Systems offers un-rivalled performance, exceptional sonic ability and unique flexibility for a very competitive price. 

The dual-mono configuration, audiophile amplifier modules and polypropylene capacitors allow for a dynamic soundstage with ample detail; yet the addition of two ECC83 valves (one per-channel) adds new life and realism to the musical performance. The sturdy casework and external power supply further help to reduce the effects of outside interference, like other models in the S Line, but the Tube Box S also externalises its valves for optimal heat dissipation.

Where the Tube Box S takes another step up in ability is in its various setting adjustments. Using the dip-switches underneath the chassis (there are two sets - one for each channel), it's possible to more accurately match the turntable cartridge's technical characteristics. The dip switches allow for various Gain, Impedance and Capacitance settings. The built-in Sub-Sonic Filter further helps tailor the sound, rolling off any problematic rumble that may appear underneath 20Hz. 

The sonic quality of the Tube Box S is extremely impressive and offers a notable improvement over any other S Line phono stage, making it an audiophile upgrade for almost any mid-priced analogue hi-fi system.

Key Features:

  • Phono stage with extensive MM & MC compatibility
  • Precise RIAA equalisation 
  • Dual-mono configuration with triode output stage
  • Audiophile-grade polypropylene WIMA capacitors
  • Switchable Impedance settings  
  • Switchable Capacitance  
  • Adjustable Gain
  • Sub-Sonic Filter built-in
  • Metal casing protects against vibration and interference 

Technical Data

Valve Complement: 2x ECC83 (12AX 7A)
Input Impedance Settings: MM: 47kΩ
MC: 10Ω, 100Ω, 1KΩ or 2KΩ
Capacitance Settings: 50pF, 150pF, 270pF or 370pF
Gain Settings: 41dB, 51dB or 61dB
Noise Floor: 94dB (A Weighted) (41dB Gain)
75dB (A Weighted) (51dB & 61dB Gain)
THD: MM: <0.01%
MC: <0.05%
RIAA Accuracy: 20Hz - 20kHz / max. 0.4dB
Subsonic Filter: -12dB @ 20Hz
Input: 1x Pair RCA / Phono Sockets
Line-Level Output: 1x Pair RCA / Phono Sockets
Power Consumption: 470mA DC
Outboard PSU: 18V / 1,000mA DC (UK Plug)
Dimensions: 103 x 74 x 125mm
103 x 74 x 137mm (Incl. Sockets)
Weight: 810g

We use DHL for domestic and international orders by default.

For orders over £150.00, delivery in the UK is FREE.

For all other orders below £150.00, shipping charges are based on weight and/or item size. 

Local collection is available (please contact us to check availability and to book your collection slot) from our demo room.

Certain product(s) are not stock items. Where items are special order - you'll receive your package the next day from when stock arrives. We'll let you know the rough ETA on placing your order but please do contact us if your order is urgent.

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