This is the Fosi Audio P1 Tube Preamplifier Mini Hi-Fi Stereo Preamp with 6K4 Valve Vacuum (not for Turntable). The 6K4 tubes in this preamplifier can be replaced with 6AK5, EF95, 5654, or 403B tubes.
This preamp is equipped with a built-in Switch impact protection circuit and overheat protection circuit, ensuring a long lifespan for the unit. and includes an 24-month manufacturer's warranty for your peace of mind.
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