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• Restart the T20 and then try to connect again, try to use another 
  Bluetooth device.

5: Why Bluetooth is intermittent?

• Please try with another Bluetooth device.
• Make sure there is no interference from other electronic devices 
  between the T20 and the audio source.
• Place your device close to the T20, and plug in the power adapter 
  again.

6: How much power does it take in standby mode? Can 
this amp be left on all the time?

• This is the class D amplifier, it will cost very low power when it is 
  in standby mode. It can be connected 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 make sure your Bluetooth microphone must be the 
  transmitter. Because T20 is a Bluetooth receiver amplifier.
• Please make sure that microphone's Bluetooth can be connected 
  to the T20's Bluetooth by your operation.

9: Why does the sound cut in and out?

• Please try to change the sound source.
• Lower the treble and bass of the T20.

• Make sure that the positive and negative terminals of the speaker 
  outputs do not touch each other. Some of the larger banana plugs 
  can easily touch each other and cause a short circuit

10: Can I bridge channel 1 and channel 2 to get 100watts?

 

• No, this amplifier can't be bridged. 

11: Why does distortion occur?

• Because the vacuum tubes amplify the sound. If you turn the 
  sound up too loud, distortion may occur. Please try turning the 
  volume down a little.

12: Can I replace the vacuum tubes?

• If necessary, there 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 vacuum tube is broken 
  or there is other problems, please contact our email, and we will 
  replace the vacuum tube for you.

14: Can headphones and speakers play at the same time?  

• No, when the headphones plug in, the speakers' output will be 
  interrupted.

Output priority: 
3.5mm Headphone Output > Speaker 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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