Tube Box S3 B in silver or black is the Pro-Ject Tube Box S3 B is a high-performance, fully balanced MM/MC phono preamplifier featuring ECC83 vacuum tubes, designed to bring audiophile warmth and precision to vinyl playback. It boasts balanced inputs and outputs, versatile impedance/capacitance loading and a discrete gain stage in a compact, steel-aluminum enclosure.
Key Features:
- True Balanced Design: Features a 5-pin mini XLR balanced input and balanced XLR outputs, offering superior noise rejection and channel separation for high-end, balanced-ready turntables.
- Tube Preamp Stage: Uses two replaceable ECC83 (12AX7) tubes to provide a lush, detailed, and warm sonic signature.
- Front-Panel Controls: Allows for easy adjustment of gain, impedance loading (10, 50, 100, 1k, 47k ohms), and capacitance (50, 150, 300, 400 pF) without needing to reach behind the unit.
- Versatile MM & MC Support: Fully compatible with both Moving Magnet and Moving Coil cartridges, with user-selectable gain settings (40, 45, 60, 65 dB).
- Dual Mono Design: Symmetrical circuit design enhances separation and reduces interference, resulting in lower total harmonic distortion (<0.005% for MM).
- Subsonic Filter: Includes a switchable 20Hz filter with a 18dB/octave slope to protect speakers from extreme low-frequency vibrations.
- Premium Construction: Built in Europe with a rigid aluminium chassis for shielding, available in silver or black.
- The unit is designed to store input settings in memory for two different turntables, allowing for easy switching between systems.
Specifications:
- Output Power: N/A
- Form Factor: rectangular, box-shaped
- Weight: 1010g without power suppl
- Connectivity: wired
Mistelbach, Austria, the unit is manufactured in Europe, specifically at production plants in the Czech Republic or Slovakia.








