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Fosi Audio BOX X2 is a Hifi tube phono preamp for MM turntable that features the Multi-function Knob which contains Power Switch and Gain Adjustment Switch with DC 12V power supply. The BOX X2 supports MM turntable input, 3.5mm AUX input and RCA line output for powered speakers or amplifiers for your home audio system. Compact ultra-low noise phono turntable preamp that converts phono signals to line level signals, which will provide you with serious sound performance.
Input Interface: | MM turntable input, 3.5mm AUX input, 12V DC input |
Output Interface: | RCA output |
Output: | Active(powered) speakers, Amplifier |
Product Adapter Input Voltage Range: | AC 100V – 240V |
DC Input Voltage: | 12V |
Output Voltage Level: | 600 Mv @3mV 1kHz |
SNR: | ≥ 98dB |
THD: | ≤0.1% |
Frequency Response: | Standard RIAA |
Product Weight: | 0.66 lb/300g |
Product Dimensions: | 4.66 inch*3.85 inch*1.29 inch (L118.5*W98*H33MM) |
Fosi Audio BOX X2 *1
Vacuum Tube *2
DC 12V Power Adapter *1
Note 1: The electronic tube is not divided into left and right; check the pins before installing the electronic tube. There is no deformation; if there is a deformation of the situation, you can use your hand to dial the right.
Note 2: Please note that electronic tubes are fragile and need to be handled gently.
RCA output: Use the RCA cable to connect the RCA line output of BOX X2 to your active (powered) speakers. Or use RCA cable to connect the RCA line output of BOX X2 to your amplifier, then use the speaker’s wire to connect the amplifier to your passive speakers.
(1): MM turntable input: Use the RCA cable to connect your MM turntable to the RCA inputs of BOX X2, then connect the ground wire of your MM turntable to the grounding post of BOX X2.
Note 1: The ground wire can be omitted if your MM turntable does not need to connect a ground wire.
Note2: MM Turntable Input can only be connected to the turntable and cannot be used as a standard preamplifier connected to other audio sources, such as CD players, TVs, etc.
(2): 3.5mm Input: Use a 3.5mm audio cable to connect the BOX X2 and your device.
Note: Once 3.5mm AUX plugs in, the MM input will automatically be interrupted so that the input mode will turn to 3.5mm AUX input.
Input priority: 3.5MM AUX input > MM turntable input.
Turn the Multi-function Knob ( Power Switch/Gain Adjustment Switch) clockwise for one time to power on the BOX X2.
Note1: The power adapter does not have a power indicator light, so connecting to the socket means power is on.
Note2: Before connecting the power supply, please ensure that the BOX X2 is in the “OFF” position when connecting to the power adapter. Otherwise, there is a “POP” click sound from your speakers.
When the connection is completed, please turn on the BOX X2 first, then turn on the amplifier (or powered speakers); at last, turn on your turntable or other audio sources, then enjoy.
Note: If you turn on the amplifier (or powered speakers) first, then turn on the BOX X2, there is a “POP” click sound from your speakers; typically, all the phono preamps have the same issues; please don’t worry about it, the “POP” click sound will not damage your amplifiers or speakers.
Note: • If the noise persists, please contact us via email at support@fosiaudio.com. BOX X2 is a preamplifier, not a power amplifier, and can not be connected with passive speakers directly.
Note: Make sure that all the cables are completely pushed into the device.
The priority of switching between the two inputs: 3.5MM AUX Input> MM Turntable input.
Note: Please confirm whether your turntable has a built-in phono preamp; if there is a phono preamp, and it cannot be deselected, then you can only connect 3.5 mm input and can not connect MM Turntable input.
After-sales email immediately, and we will replace the vacuum tube for you.
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