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Tube Box S2 Phono Pre-Amp - Silver

SKU eq-1397-ttlsf

audiophile preamp w/replaceable tube technology, MM + MC compatible
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  • Lab Overview
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Lab Overview


  • compact audiophile phono preamp with tube technology
  • great entry level tube phono stage, tubes are replaceable for tube rolling + sound shaping
  • supports both MM and MC cartridges
  • customizable gain settings on front panel
  • front side gain + subsonic filter controls
  • fully discreet circuit design without OpAmps, ultra low noise circuitry
  • gold plated RCA inputs + outputs
  • double mono circuitry for optimized channel separation
  • high quality metal casing offers shielding from both vibration and electromagnetic interference
  • also available in black

"Tube Box S2 is our very first product to feature a fully discreet circuit design without using any operational amplifiers (OpAmps). It also is the first product to come with replaceable tubes for tube rolling and sound-shaping. This gives the customer many options to pick from and alter the sound signature to his preference. Tube Box S2 will give a full and relaxed laid back sound with lush mids, just like you would expect it from a much bigger high end tube phono pre-amplifier. It offers support for both MM and MC cartridges and comes with many gain settings to be switched on the front panel. Five variable input impedance settings are available to adjust to any MM cartridge, the 47k ohms input impedance setting is fixed and suited for high output MC cartridges. The aluminium/metal casing is adapted to our DS2 line in looks and protects against vibrations and electromagnetic interferences for superior sound." - Pro-Ject


  • tubes: 2 x ECC83 (12AX7A)
  • input impedance: 10 ohms, 100 ohms, 1 kohm, 2 kohms
  • input gain: 40 dB, 43 dB / 50 dB, 60 dB und 63 dB
  • noise floor: 80 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 EQ Curve Accuracy: 20 Hz - 20 kHz / max 0.4 dB
  • input/output: RCA pair
  • Output Voltage: 18 V / 1.000 mA DC
  • Dimensions (WHD): 4.1 x 2.8 x 5.1 in. / 103 x 73 x 131 mm
  • Weight: 0.9 lbs / 410 g (without psu)


  • 2x ECC83 tubes (replaceable)
  • power supply
    UPC: 9120071658595

    Review & Q+A


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