Tube Box E

Tube Box E in Black / Gray. Compact, high-value valve phono preamplifier designed for both Moving Magnet (MM) and Moving Coil (MC) cartridges. It features a fully discrete circuit, excluding operational amplifiers to deliver a warm, "tube-like" sound, featuring 2x ECC83 tubes that are replaceable for tube rolling.

Key Features:

- Cartridge Compatibility: Supports both Moving Magnet (MM) and Moving Coil (MC) cartridges with adjustable gain (40–63 dB) and impedance settings.

- Tube Amplification: Uses 2 x ECC83 (12AX7A) tubes, which are replaceable, allowing for "tube rolling" to customize the sound signature.

- Audio Circuitry: Features a fully discrete design (no operational amplifiers) with a low-noise FET input stage and precise, two-part passive/active RIAA equalization.

- Dual-Mono Design: Uses independent circuitry for each channel to optimize channel separation.

- User Controls & Build: Features a front-panel subsonic filter button and gain control. The chassis is made of metal for shielding, with a machined aluminum front panel available in black or silver.

- Adjustable Loading: Input impedance (10–47k ohms) and capacitance (47–587 pF) can be adjusted on the bottom of the unit for precise cartridge matching.

- Input Impedance: 10, 100, 1k, 2k ohms, or 47k ohms.

- Input Capacitance: 47pF, 147pF, 267pF, 367 pF, 487 pF, and 587 pF.

Specifications:

- Output Power: N/A

- Form Factor: Rectangular, compact chassis

- Weight: 450 g without power supply

- Connectivity: wired