Fosi Audio BOX

Welcome to MJ Select. We are Japanese seller. We ship authentic items from Japan. Please enjoy shopping with peace of mind! ----------------------------------------------------------- 【About Included Manuals】 If a manual is included, it will primarily be in Japanese. We recommend using image translation apps if needed. 【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. ----------------------------------------------------------- Upgrade: Updated version of "Fosi Audio BOX X2". A next-generation phono preamplifier that delivers overwhelmingly high sound quality. JAN 5654W Vacuum Tube MM Phono Preamp: The BOX X4 phono preamp supports 3.5MM AUX and MM turntable inputs and converts phono signals to line level signals. Low-noise integrated circuits and high-quality components eliminate low-frequency noise and provide clear sound quality. It is also equipped with a ground terminal to protect the turntable. Vacuum Tube Headphone Amplifier & Preamplifier: BOX Compatible vacuum tube models: 6K4/6J1/6J4/GE5654/6AK5/66 *Inside vacuum tubes, etc. You can DIY your stereo system by replacing the vacuum tubes. You can enjoy different sounds with different vacuum tubes. Package includes: BOX X4 phono preamplifier, DC12V power supply, user manual, our worry-free 24-month warranty, and friendly customer service. Input interface: mm turntable input, 3.5 mm aux input, 12 V DC input   Output interface: RCA output, 3.5 mm headphone output   Output: active (power) speaker, amplifier, headphones   Applicable headphone type: 16Ω   Output voltage level: 1 kHz and 650 mV   SNR ≥ 70 dB   THD ≤0.1 %   Frequency response: Standard RIAA