Pro-Ject Tube Box S

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The Pro-Ject Tube Box S sets the sonic standard for an entry-level tube phono stage. This product is built using the same high-grade metal chassis shared with the rest of the new "S" product series. This all metal case features great shielding from both vibration and electromagnetic interference. Selectable MM and MC modes as well as cartridge loading via bottom panel mounted switches. Gain is rated at 41dB, 51dB and 61dB (MC) and is derived by a pair of graded ECC83 (12AX7A) tubes.


  • Tubes: 2 x ECC83 (12AX7A) Triode Output
  • Load Capacity: 50. 150, 270 and 370pF with 47k ohm settings only 10, 100, 1k, 2k ohm, typical for low output MC cartridges
  • Load Impedance: 47k ohm, typical for MM or high-output MC cartridges
  • Gain:
    • 41dB, typical for MM or high-output MC cartridges
    • 51dB or 61dB typical for low-output MC cartridges
  • Noise MM: 84dB (94dB - A weighted)
  • Noise MC: 67 dB (75 dB A-Weighted)THD MM:0.01%
  • THD MC: 0.05%
  • RIAA EQ Curve Accuracy: 20 Hz - 20 kHz / max 0.4 dB
  • Power Consumption: 18 V / 470 mA AC
  • Power Supply: Mains-fed Outboard Power Supply
  • Output Voltage: 16 V / 1000 mA AC
  • Dimensions (W x H x D): 4.1 x 3 x 5 in., 103 x 74 x 112 mm
  • Weight: 1.8 lbs., 810 g
  • Finish: Black or Silver

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