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2: Can I connect a turntable to T20 amp, why is the
volume is extremely Low?
• As for the turntables do not have a built-in preamp, you need to
add an external phono preamp before connecting T20, such as
our BOX X1, or BOX X2.
• As for the turntables which have a built-in preamp, you need to
switch the preamp on before connecting T20.
3: Why does the sound is cracking or make a lot of
electric noise?
• Please make sure all the cables completely pushed into the
devices, incompletely connection will cause this cracking.
• Please remove all the inputs then check whether cracking noise
disappear or not, the cracking maybe from the audio source or
input cables.
• If you are not using the original factory standard power supply,
please replace the power supply before testing. Many power
supply in the market have large interference coefficient, which
will cause a lot of current sound.
• Please check if the vacuum tube is completely plugged in, and try
to change the left and right vacuum tubes.
4: My Bluetooth device cannot pair with T20?
• Make sure that you have selected the input mode switch to BT on
the back panel of the T20.
• Make sure that T20 is powered on.
• Make sure that T20 is not paired with other devices.
• Make sure that the distance between your device and T20 is not
too long.
• Make sure there are no barriers between your device and T20,
barriers will affect the Bluetooth operation distance.
• Please reconnect the power supply to the T20, and move the T20
to another room to have a try.
Bluetooth Input
Prepare your Bluetooth device (take a phone as an example)
Step 1: Install the Bluetooth antenna.
Step 2: Select the input mode switch to BT on the back panel of
the T20, The indicator is blue and flashing.
Step 3: Turn on the Bluetooth on your phone and search “ Fosi
Audio” or “Fosi Audio T20”, the indicator stays blue after a
successful pairing.
Step 4: Open the audio application, play and enjoy!
AUX Input
Prepare: audio source (take a TV as an example), a RCA cable or a
3.5mm AUX to RCA cable.
Step 1: Select the input mode switch to AUX on the back panel of
the T20, the indicator light shows red light;
Step 2: Connect your TV to “Audio Input” via a RCA cable;
Step 3: Open your TV, play and enjoy!
Troubleshooting/QA
1: What type of speakers work best with T20 Amplifier?
• Fosi Audio Amplifiers work great with any 2-8 ohm passive
speakers. You can connect passive speakers via the Speaker
Output or active speakers via the Headphone Output.
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