Fosi Audio Box X2

Tube MM phono preamplifier: This Fosi Audio phono preamp removes low-frequency noise and delivers clear sound quality by converting phono signals into line-level signals using high-quality components and low-noise integrated circuits. It is designed to protect your turntable with a grounding terminal.

3 switchable gain modes: You can switch between three modes: 39, 42, or 45 dB. The adjustable gain levels provide high compatibility and customizable control. It also features a well-designed circuit and high-quality entry-level analog sound.

Tube preamplifier: With a 3.5 mm AUX input, it also functions as a tube preamp. Fosi Audio uses high-quality components in the design and assembly of this phono preamplifier, delivering a warm and smooth sound signature.

Compatible tube models: Supported vacuum tube models include 6K4, 6J1, 6J4, GE5654, 6AK5, and 66, among others. To customize your stereo system, simply swap the tubes—note that different tubes will produce different sound characteristics.