Project Tube Box S3 B Phono Preamplifier

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Project Tube Box S3 B Phono Preamplifier

Price
£529.00
Product Condition
New
Project Tube Box S3 B Phono Preamplifier
Product Colour
- Optional
- Optional

Bring true analogue warmth to your vinyl setup with this compact, balanced tube phono preamplifier. Designed for MM and MC cartridges, it delivers clean, immersive sound with flexible controls.

  • Fully symmetrical & discrete gain stage
  • Semi-passive RIAA equalisation
  • MM & MC Compatibility
  • Dual-mono electrical design
  • Solid metal casing protects from interferences

Close-up of the front of the Project Tube Box S3 in black

Premium Design with European Craftsmanship

Crafted in Europe, the Tube Box S3 B features a robust aluminium chassis that protects against interference and vibration. Its sleek, compact form is available in silver or black, making it a stylish addition to any hi-fi system. Front-panel controls offer easy access to key settings, while dual turntable inputs add convenience for vinyl enthusiasts.

The rear view of the Project Tube Box S3 in silver

Balanced Audio for Cleaner Playback

The “B” stands for balanced – and that’s where this phono stage shines. Using a symmetrical signal path via a 5-pin mini XLR input and balanced XLR outputs, it extracts musical detail while cancelling out noise. This design ensures a purer, more dynamic sound, typically found in far more expensive equipment.

A project turntable beside the Tube Box S3 and another piece of Project equipment to the right

Flexible Cartridge Matching Made Simple

With gain settings from 40dB to 65dB and ultra-low loading options like 50pF and 10 ohms, the Tube Box S3 B adapts to a wide range of MM and MC cartridges. Each input stores its own settings, allowing seamless switching between turntables. Whether you're dealing with high-capacitance cables or fine-tuning your setup, this phono stage offers precision and ease.

Specifications
  • Input Impedance (MM): 47 kΩ
  • Input Impedance (MC): Variable 10 - 1,000Ω
  • Phono Stage Capacitance (MM): 50, 150, 300 or 400 pF
  • Phono Stage Equalization Options: RIAA
  • Subsonic Filter: at 20Hz with 18dB/octave
  • RIAA Accuracy (20Hz - 20kHz): <0.4 dB
  • Valves: 2 x ECC83
  • THD (MM Input): <0,005 %
  • THD (MC Input): <0,01 %
  • Signal To Noise Ratio (MM Input): 40 dB
  • Signal To Noise Ratio (MC Input): 60 dB
  • RCA Input(s): 1x Pair RCA Phono Sockets
  • Balanced Mini-XLR Input: 1x 5-pin Mini XLR
  • Fixed Analogue Output(s): 1 x RCA Pair, 1 x XLR Pair
  • External Power Supply Rating: 18V-1000mA DC
  • Maximum Power Consumption: <0.5 W
  • Additional Dimensions (W x H x D): With Sockets: 206 x 81 x 164 mm
  • Dimensions (W x H x D): 206 x 81 x 153 mm
  • Weight: Without Power Supply: 10.1 kg

Overall Rating