The Fosi Audio P3 is a sophisticated tube preamp that marries vintage warmth with modern wireless convenience. Its elevated 54V tube circuit ensures optimal valve performance, delivering the characteristic sonic richness—crystalline treble, lush midrange presence, and authoritative bass—that tube enthusiasts prize. The preamp integrates Bluetooth 5.1 with Qualcomm's QCC3031 chipset, supporting aptX HD and aptX LL codecs for high-fidelity wireless streaming with minimal latency. A manual reset button safeguards against unwanted connections, ensuring reliable pairing. Dual bass and treble controls with center detents provide precise tonal shaping or transparent bypass, while premium ELNA capacitors and precision potentiometers maintain exceptional signal integrity with 103dB signal-to-noise ratio and 95dB channel separation. The P3 accommodates multiple input sources via Bluetooth and RCA, with flexible outputs for headphones (16-300Ω impedance), active speakers, or integration with external amplifiers and subwoofers to build a complete 2.1-channel system. Includes two 5654W vacuum tubes and a dedicated power supply. Backed by a 24-month warranty and dedicated customer support.