Tube Box S

The Tube Box S is a phono pre-amplifier with a valve output stage that offers unrivalled performance and unique flexibility. It offers an extra step-up from Pro-Ject's introductory range of phono stages, while still maintaining a very appealing price point.

The sonic quality of the Tube Box S is extremely impressive, and offers a big improvement on the smaller Phono Box S model, making it an audiophile upgrade for almost any mid-priced analogue hi-fi system. With a wide range of setting parameters, it can meet the needs of almost any MM or MC phono cartridge on the market. The carefully selected audiophile-grade components make it possible to enjoy your valuable vinyl collection like never before.

The class-leading music reproduction qualities of Tube Box S gives pure dynamics, full transparency, analogue warmth, bass texture, detail resolution and purity of all audible frequencies. All in all, it effectively brings a retro ethic to modern phono electronics.

Key Features:

  • MM & MC support 
  • Precise RIAA equalisation 
  • Dual-mono triode output stage 
  • Switchable impedance settings  
  • Switchable capacitance  
  • Adjustable gain
  • Non-switchable subsonic filter
  • Metal casing protects against vibration and interference 
  • Improved circuitry and components when compared to the old Tube Box II

Technical Data:

Tubes: 2 x ECC83 (12AX 7A)
Input Impedance: 10/100/1k/2k ohms (MC)/47k ohms (MM) 
Input Capacitance: 50/150/270/370pF
Gain Switch:

MM: 41dB
MC: 51dB and 61dB
Noise Floor:

84dB (94dB – IEC -A) @ 41dB
67dB (75dB – IEC -A) @ 51dB and 61dB
THD: 0.01% MM/ 0.05% MC 
RIAA Deviance: Max. 0.4dB/20Hz - 20kHz 
Subsonic Filter: -12dB @ 20Hz (Non Switchable) 
In/Out Sockets: 1 Pair RCA/Phono Sockets
Line-Level Output: 1 Pair RCA/Phono Sockets
Outboard Power Supply: 18V/1000mA DC
Power Consumption: 470mA DC, <1W In Standby
Dimensions W x H x D: 103 x 74 x 104mm
Face Plate: Silver Or Black
Weight: 810g Without Power Supply

Please note: You will need interconnect cables to connect this phono stage to your amplifier.


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Pro-Ject Audio Systems > Phono Electronics >  Tube Box S
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