Pro-Ject Tube Box E Tube Phono Preamplifier

Compact tube-based phono preamplifier with fully discrete circuitry and replaceable ECC83 tubes — designed to bring warm, musical analog sound to your turntable setup.

The Pro-Ject Tube Box E is a precision-engineered tube phono preamplifier that enriches your vinyl playback with the classic warmth and musicality associated with tube amplification. Its fully discrete circuit design avoids operational amplifiers for ultra-low noise performance and accurate RIAA equalization, resulting in clean, natural sound with lush mids — typically found in much larger and more expensive tube phono stages. Supporting both moving magnet (MM) and moving coil (MC) cartridges, Tube Box E features adjustable gain and loading options to match a wide range of cartridges. The front-panel subsonic filter and gain controls let you tailor performance on the fly, while replaceable 2 x ECC83 tubes offer the freedom to experiment with tube rolling and fine-tune your sound signature. Built in a rigid metal enclosure with beautifully machined aluminium controls and gold-plated RCA connectors, Tube Box E offers both reliability and elegance — available in classic black or silver finishes to fit any hi-fi system. 

Key Features

• Supports MM & MC cartridges: Flexible compatibility for a wide range of turntable setups. 
• Fully discrete circuit design: No operational amplifiers — ultra-low noise and precise RIAA equalisation. 
• Replaceable ECC83 tubes: 2 x ECC83 (12AX7A) tubes for natural tube tonality and customizable sound. 
• Front panel controls: Gain adjustment and subsonic filter for intuitive tuning. 
• Dual mono architecture: Independent channels for enhanced stereo separation. 
• Precise loading options: Capacitance and impedance options easily adjusted underneath to match cartridge specs. 
• RIAA equalisation accuracy: ±0.5 dB from 20 Hz to 20 kHz for faithful vinyl playback. 
• Gold-plated RCA I/O: Reliable signal transfer with low corrosion risk. 

Technical Specifications

Best For

• Vinyl enthusiasts seeking tube-flavored warmth and musicality from their phono stage.
• Turntable setups with MM or MC cartridges requiring low-noise amplification and RIAA accuracy.
• Analog lovers who appreciate modular tube rolling and sound shaping.
• Compact hi-fi systems where space-efficient components are essential.
• Systems where detailed midrange presence and relaxed sonic character enhance musical enjoyment.