The upgraded version of Fosi Audio BOX X2. NEW-generation phono preamp for unrivaled sound quality. JAN 5654W Tube 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: 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 18-month warranty, and friendly customer service.
Input Interface: MM turntable input, 3.5mm AUX input, 12V DC input Output Interface: RCA output, 3.5mm headphone output Output: Active(powered) speakers, Amplifier, Headphones Applicable headphone types: 16 Ω – 300 Ω Output Voltage Level: 1kHz and 650mV SNR: ≥ 70dB THD: ≤0.1% Frequency Response: Standard RIAA Product Adapter Input Voltage Range: AC 110V – 240V
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