Fosi Audio Box X4 Phono Preamp & Headphone Amplifier with JAN 5654W Vacuum Tubes for MM Turntable Phonograph Preamplifier

• 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