Fosi Audio Box X4 MM Turntable Phono Preamplifier
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We started tracking this price on 27 Oct 2026. The chart fills in as prices change, so you can see whether today’s price is a good one.
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About this product
2021 NEW MODEL: The updated version for BOX X2. Next-generation phono preamp for unrivaled sound quality. MM Phono Preamplifier: The BOX X4 phono preamp supports 3.5MM AUX and MM turntable input, converting phono signals to Line Level signals with low-noise integrated circuits and high-quality components to remove low-frequency noise ensure clear sound quality. Designed with a grounding post to protect your turntable. Tube Headphone Amplifier & Preamplifier: The BOX X4 is designed with a 3.5MM AUX headphone and RCA output, highly useful beyond imagination. Applicable Vacuum Tube Model: 5654W/6K4/6J1/6J4/GE5654/6AK5/66*In vacuum tubes, etc. You can replace the vacuum tubes to DIY your stereo system. Different tubes with different sounds. What You Get: BOX X4 phono preamp, DC 12V power supply, user manual, our worry-free 24-month warranty, and friendly customer service. Specifications Spec…
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