Tube Box E

Tube Phono Preamplifier

The Tube Box E expands the Pro-Ject E-Line with genuine tube-based phono amplification, delivering the warm, musical character that vinyl enthusiasts appreciate. Its fully discrete circuit design avoids the use of operational amplifiers (OpAmps), resulting in low-noise performance, accurate RIAA equalisation, and long-term serviceability.

Equipped with two replaceable ECC83 tubes, the Tube Box E allows users to experiment with tube rolling and tailor the sonic character to their personal preferences. The result is a rich, relaxed presentation with lush midrange reproduction and a highly engaging analog sound.

KEY FEATURES

• Cartridge Compatibility MM & MC Cartridges
• Circuit Design Fully Discrete, No OpAmps
• Tubes 2 × ECC83 (12AX7A), Replaceable
• RIAA Equalisation Passive / Active Two-Stage Design
• Gain Control Front Panel Adjustable
• Subsonic Filter Front Panel Switchable
• Input Stage Ultra-Low Noise FET Input
• Channel Configuration Dual Mono Circuitry
• Connectors Gold-Plated RCA Inputs & Outputs
• Construction Full Metal Chassis with Aluminium Front Panel
• Available Finishes Black or Silver

CARTRIDGE SETTINGS

• Input Impedance (MC) 10 Ω, 100 Ω, 1 kΩ, 2 kΩ
• Input Capacitance (MM) 47 pF, 147 pF, 267 pF, 367 pF, 487 pF, 587 pF
• MM Input Impedance 47 kΩ
• Gain Settings 40 dB, 43 dB, 50 dB, 60 dB, 63 dB

AUDIO PERFORMANCE

• RIAA Accuracy ±0.5 dB (20 Hz – 20 kHz)
• Noise Floor 77 dB (A-weighted) @ 40 dB gain
  65 dB (A-weighted) @ 50 dB / 63 dB gain
• Total Harmonic Distortion <0.03% @ 40 dB gain
  <0.07% @ 50 dB / 63 dB gain
• Subsonic Filter 20 Hz, 18 dB/Octave

CONNECTIONS

• Input 1 × RCA / Phono Stereo Input
• Output 1 × RCA Stereo Output

POWER

• External Power Supply 18 V DC / 1000 mA
• Power Consumption 470 mA DC
• Standby Consumption < 1 W

DIMENSIONS & WEIGHT

• Dimensions (W × H × D) 103 × 73 × 131 mm
• Weight 450 g (without power supply)