Pro-Ject Tube Box S


Out of stock

Experience the vacuum tube difference

  • Few things go together quite like the relaxed sound of vinyl and the warm glow of vacuum tubes. Pro-Ject understands. They’ve been building high-performance turntables and electronics for years. Their Tube Box S phono preamp is a shining example of all that expertise. Connect it to your ‘table, and this sweet little tube preamp will lend depth and spaciousness to the sound of your LPs. It’s an addictive experience that will keep you listening deep into the night.

A big upgrade from stock turntable inputs

  • Many receivers and amplifiers these days lack the phono input you need to hook up your turntable. And when manufacturers do include one, they often use low-cost, low-performance circuitry that sounds lifeless and flat. Pro-Ject’s Tube Box S neatly solves that problem. It boosts and equalizes the tiny voltages generated by your ‘table’s phono cartridge to deliver a robust, line-level signal infused with detail and three-dimensional presence. Pro-Ject’s dual-mono design dedicates one tube per channel for maximum channel separation and superior stereo imaging.

Flexible operation

  • This preamp’s inputs are compatible with either moving magnet or moving coil cartridges, to ensure proper matching with virtually any turntable and cartridge combination. And no matter what kind of phono cartridge you mount on your turntable, this versatile preamp gives you a range of input impedance/capacitance and gain settings to optimize its performance with your system. The Tube Box S also includes a subsonic filter to reduce low-frequency turntable rumble that can result in wasted amplifier power.


Out of stock

This new phono preamplifier with tube output stage offers unrivalled performance and unique flexibility, which never before was available at this price! Sonic quality of Tube Box S is extremely impressive, a big improvement to Phono Box S and an audiophile upgrade for most analogue hifi system. With a wide range of setting parameters, it can meet the needs of almost any phono cartridge on the market. Carefully selected audiophile-grade components make it possible to enjoy your valuable vinyl collection like never before! The class-leading music reproduction of Tube Box S gives pure dynamics, full transparency, analogue warmth, bass texture, detail resolution and purity of all audible frequencies.

Key Features

  • Audiophile performance
  • Audiophile-grade ECC83 (12AX7)
  • Dual mono configuration
  • Audiophile-grade polypropylene WIMA capacitors
  • Precise RIAA equalisation
  • Switchable input impedance/capacitance
  • 3 adjustable gain levels
  • Subsonic filter
Weight 810 g
Dimensions 137 × 103 × 74 mm

Receivers Amps Preamps

Input impedance 10/100/1k/2k ohms (MC)/ 47k ohms (MM)
Input capacitance 50/150/270/370 pF
Gain switch 41/51/61 dB
Signal-to-noise ratio MM (41 dB): 84 dB (94 dB – IEC -A) MC (51/61 dB): 67 dB (75 dB – IEC -A)
In/Out sockets 1 pair RCA connectors
power consumption 470 mA / < 1 watt in standby
power supply 18 Volt DC/1000 mA


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