Description
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
| Tube Assembly | 2 x ECC83 (12AX7A) replaceable |
|---|---|
| Input Impedance | 10 , 100 , 1 k, 2 k |
| Input Capacitance | 47, 147, 267, 367, 487, 587 pF / 47 k |
| Gain Settings | 40 dB, 43 dB / 50 dB, 60 dB, 63 dB |
| Noise Floor | 77 dB (A-weighted) @ 40 dB gain, 65 dB @ higher gain settings |
| THD | <0.03% @ 40 dB gain; <0.07% @ 50 dB/63 dB |
| RIAA Accuracy | 0.5 dB (20 Hz 20 kHz) |
| Subsonic Filter | 20 Hz @ 18 dB/octave |
| Inputs | 1 pair RCA/phono sockets |
| Outputs | 1 pair RCA/phono sockets |
| Power Supply | Outboard 18 V/1 A DC |
| Power Consumption | 470 mA DC, <1 W standby |
| Dimensions (WHD) | 103 73 115 mm (131 mm with sockets) |
| Weight | 450 g (without power supply) |
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.
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