Fosi Audio
Fosi Audio Box X4 Phono Preamp & Headphone Amplifier with JAN 5654W Vacuum Tubes for MM Turntable Phonograph Preamplifier
Couldn't load pickup availability
-
2021 NEW MODEL: The updated version for BOX X2. Next-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.

Specifications
-
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






