Fosi Audio Box X4 Phono Preamp/Headphone Amp

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 Specifications Details Model BOX X4 Applicable headphone types 16 Ω Input Mode MM turntable + 3.5mm AUX Output Mode RCA + 3.5mm headphone output Output Active(powered) speakers, Amplifier, Headphones Frequency Response Standard RIAA THD ≤ 0.1% SNR ≥ 70dB Device Dimension 4.72 x 3.97 x 1.37 inches DC Input Range 12V Input Voltage Range AC 110V - 240V Output Voltage Level 1kHz and 650mV Power Supply 12V 1.5A What‘s in the box？ Item Quantity BOX X4 phono preamp x 1 Vacuum Tubes x 2 DC 12V power supply x 1 User's Manual x 1 BOX X4 User Manual

Specifications

• Applicable headphone types: 16 Ω
• Input Mode: MM turntable + 3.5mm AUX
• Output Mode: RCA + 3.5mm headphone output
• Output: Active(powered) speakers, Amplifier, Headphones
• Frequency Response: Standard RIAA
• THD: ≤ 0.1%
• SNR: ≥ 70dB
• Device Dimension: 4.72 x 3.97 x 1.37 inches
• DC Input Range: 12V
• Input Voltage Range: AC 110V - 240V
• Output Voltage Level: 1kHz and 650mV
• Power Supply: 12V 1.5A