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DESCRIPTION

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). It’s a hybrid design utilizing tubes in the input & gain stages. 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.

Pro-Ject Tube Box S2 Phono Preamplifier

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  • $ 499
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DESCRIPTION

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). It’s a hybrid design utilizing tubes in the input & gain stages. 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.

FEATURES
  • Suitable for MM and MC cartridges
  • Precise RIAA equalization in two parts, passive/active
  • Fully discreet circuit design without OpAmps
  • 2x ECC83 tubes (replaceable)
  • Front-sided Subsonic filter button
  • Front-sided Gain control
  • Ultra low noise circuitry with FET input stage
  • Dual mono circuitry for optimized channel separation
  • Polystyrene capacitors used where possible
  • Gold-plated RCA in- and outputs
  • External power adaptor and multiple internal power supplies
  • Well-filtrated high-voltage anode power supply
  • Sandwich aluminum/metal casing protects from vibrations and electromagnetic interference
  • Available in silver or black
  • Handmade in Europe
TECHNICAL SPECS
  • Tube Assembly: 2x ECC83 (12AX7)
  • Input Impedance: 10 / 100 / 470 / 1k / 2k ohms, fix 47k ohms
  • Capacitance: 50 / 150 / 270 / 370 / 490 / 590 pF
  • Gain MM / MC: 40 / 43 / 50 / 60 / 63dB
  • Signal-to-Noise Ratio: 77dBA
  • HD + N: <0,0025%
  • RIAA Curve Accuracy: + / - 0,4dB / 20Hz - 20kHz
  • Subsonic Filter: 20Hz @12dB / octave
  • Input / Output: 1x RCA / 1x RCA
  • Dimensions: 1.46"h x 4.06"w x 4.69"d
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