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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.

Содержание T20

Страница 1: ...Thanks for choosing us Fosi Audio T20 User Manual ...

Страница 2: ...vacuum tube is also replace able as you like it is a fantastic amplifier that suit for your personal PC desk book room or for your home theater in your living room Bring joy and happiness to your smarter life THD SNR Max Power Output 0 04 99dB Power Adapter 24V 4 5A 50W x 2 4Ω Frequency Range 20Hz 20kHz 1 dB Input Mode Bluetooth and AUX Bluetooth Transmission Distance Up to 50ft 15m Bluetooth Tran...

Страница 3: ...unctions Power Switch Indicator Light Bass Control Treble Control Volume Control 3 5mm Headphone Output Front Panel Back Panel BT AUX Mode Switch Audio Input Speaker Output DC Input Bluetooth Antenna Interface Bluetooth Antenna ...

Страница 4: ... connect the speaker s wire via the bare wire or the banana plugs Or Connect a wired headset to the Headphone Output on the front panel of the T20 the speaker output will disconnect once the headset is plugged in Prepare 4 Connect the 24V power supply to the DC input Prepare 5 Turn on the Power Switch Note Before turning on the power switch of the amplifier please turn the volume button to the low...

Страница 5: ...itive and negative speakers wires to contact each other which will result in no sound output How to connect the speaker wire Method 1 Bare wire connection illustration Release the horn terminals block terminals Insert the two ends of the speaker wire into the amplifier and speaker terminal holes Tighten the horn terminals Note Please make sure that the speakers wire are not attached with each othe...

Страница 6: ...rce 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 speak...

Страница 7: ......

Страница 8: ...put 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 h...

Страница 9: ...ed all the time and it is safe without power consumption 7 Sound quality is not good Make sure all the cables are fully connected Adjust the treble and bass control of the power amplifier to achieve the right tone Please try to change the sound source and cables to test Please check if the vacuum tube is broken or completely plugged in 8 Can T20 accept signal from a Bluetooth microphone Please mak...

Страница 10: ...here are substitutions EF95 6AK5 6AK5W 403A 403B 6J1 6J1P 6J2 6J3 6J4 6J5 vacuum tubes etc You can replace the vacuum tubes to DIY your stereo system Note Please must remember switch off the power BEFORE you pull out the tube or it might damage the device 13 Why the T20 came with a broken vacuum tube Due to the long distance the vacuum tube may be damaged during transportation If you find that the...

Страница 11: ...ted correctly Please check that the cable is not loose damaged Incomplete connection is one of the main reasons for no sound Please make sure the Bluetooth is paired or not if Bluetooth is connected AUX input will be disconnected If you want to connect this amplifier with a 3 5mm AUX cable you need to disconnect the Bluetooth first Please make sure that the headset is connected or not If the heads...

Страница 12: ...s have an 18 month limited warranty on parts and labor from the date of purchase Please contact us if you have any problems About Fosi Audio Fosi Audio designs and builds innovative audio products with all your music in mind Great sound simple but elegant designs high quality materials and truly useful features are what Fosi Audio is about We sincerely hope you get as much enjoyment from our produ...

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