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Pro-Ject - Tube Box S Phono Preamp

Pro Ject

  • $ 44900

Pro-Ject Tube Box S Phono Preamp

Setting the Sonic Standard for Entry-Level Tube Phono Stages

The Pro-Ject Tube Box S brings new levels of performance to cost-effective phono stages. A pair of graded ECC83 (12AX7A) tubes keeps your LPs sounding smooth, warm, and robust. The Tube Box S is built using the same high-grade metal chassis as the rest of Pro-Ject's innovative new "S Box" line.

This all metal case features great shielding from both vibration and electromagnetic interference, while selectable MM and MC modes and cartridge loading via bottom panel mounted switches ensure usability with virtually any cartridge. The Tube Box S's Gain is rated at 41dB, 51dB and 61dB (MC).


MM & MC support
Precise RIAA equalization
Double mono triode output stage
Impedance 10/100/1k/ 47k ohms adjustment
Capacitive 100/200pF adjustment
Gain 41/51/61dB adjustment
Subsonic filter
Metal casing protects against vibration and interference
Available in silver or black

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 (WHD): 4.1" x 3" x 5"
Weight: 1.8 lbs.

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