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Tube Box S

Name: Pro-Ject Audio Systems Tube Box S
Brand: Pro-Ject Audio Systems

Pro-Ject Audio Systems

Tube Box Series

AnalogPhono Pre-Amps

Estimated price (community-sourced)

$279

About the Tube Box S

The Pro-Ject Tube Box S is a dual-mono phono preamplifier designed for audiophile-grade vinyl playback. It features ECC83 (12AX7) vacuum tubes in a dual-mono configuration, delivering a warm, detailed sound signature with precise RIAA equalization (±0.4dB deviation). The unit offers adjustable input impedance (10Ω-2kΩ for MC/47kΩ for MM) and capacitance loading (50-370pF), along with three gain settings (41/51/61dB) to accommodate various cartridges.

Specifications

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