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Product Specifications

• Fosi Audio BL20A is a powerful Bluetooth 5.0 HiFi stereo   

  amplifier with AUX pre-output, which can be used as a 

  pre-amplifier. Design Treble & Bass control and remote 

  control to meet your more needs. 

• The BL20A supports AUX/U-Disk/Bluetooth input, suitable 

  for most home passive speakers. Using two low-distortion 

  TPA3116 high-performance chips to display 

  ultra-high-definition sound quality. 

• Let's join the audiophile’s music journey with Fosi Audio 

BL20A! 

Input Interface

AUX/U-Disk/Bluetooth Input

SNR

92dB

THD

<0.001%

Power Amplifier Chip

TPA3116×2

Bluetooth Chip

ATS2853

Power Adapter

24V/4.5A

DC Input Range

DC 12-24V

Frequency Response Range 15Hz- 20KHz
Load Impedance

2-8 Ohm

Input Sensitivity

500mV

U-Disk Capacity

Max 32GB

Support Format

MP3/WMA/APE/ FLAC/WAV

Max Power Output

100watt×2

Output Interface

Speaker’s  
3.5MM AUX Pre-out

Bluetooth Transmission 
Distance

Bluetooth 5.0, up to 164ft/50m

Output 

Passive Speakers, 
Powered Speakers, Amplifier

Содержание BL20A

Страница 1: ...BL20A Bluetooth Power Amplifier User s Manual Red AUX USB Blue BT Treble Bass IR BL20A BLUETOOTH POWER AMPLIFIER MODE VOL ...

Страница 2: ...inition sound quality Let s join the audiophile s music journey with Fosi Audio BL20A Input Interface AUX U Disk Bluetooth Input SNR 92dB THD 0 001 Power Amplifier Chip TPA3116 2 Bluetooth Chip ATS2853 Power Adapter 24V 4 5A DC Input Range DC 12 24V Frequency Response Range 15Hz 20KHz Load Impedance 2 8 Ohm Input Sensitivity 500mV U Disk Capacity Max 32GB Support Format MP3 WMA APE FLAC WAV Max Po...

Страница 3: ... Control 6 Multi function Knob Power Switch Mode Switch Volume Control 2 AUX U Disk Blue tooth Input Indicator Light 1 Infrared Radiation Note Multi function Knob Long press to power on off Short press to switch mode Turn left to decrease the volume Turn right to increase the volume 9 Passive Speakers Output 10 Bluetooth Antenna Interface 11 DC Input 12 Bluetooth Antenna 8 3 5MM AUX Pre output 7 3...

Страница 4: ...Remote Control Infrared remote control working distance 15 m 10 11 12 9 8 7 L R INPUT PRE OUT OUTPUT SPEAKERS ANT Bluetooth DC 12V 24V 3 2 1 5 9 6 4 7 8 13 12 16 11 15 10 V V MODE H B H B 14 ...

Страница 5: ...o switch single loop or all loop playback 2 Short press Play Pause Note After connecting Bluetooth to the BL20A in Bluetooth mode long press this button will disconnect the Bluetooth connection 13 Short press to switch mode AUX U Disk Bluetooth Note U Disk must be inserted into the BL20A skip it if not 6 Short press Previous track Note It can only be used in Bluetooth or U Disk mode AUX mode does ...

Страница 6: ...ed speakers Package Contents BL20A Bluetooth Amplifier x 1 Bluetooth Antenna x 1 Remote Control x 1 Not include battery Power Adapter x1 AC Cord x1 User Manual x 1 Long press Fast backward 15 Long press Fast forward Note Fast backward and Fast forward functions can only be used in U Disk mode 16 Select a specific song in U Disk mode 0 9 Number buttons Note It can only be used in U Disk mode For so...

Страница 7: ...ht of BL20A stays red after power is on Note1 Please make sure the LED light on the power adapter stays on Note2 Before connecting the power supply please turn down the bass and treble control to 0 always to the left to avoid your hearing from damage Step 4 Connect the audio source AUX input U Disk input Bluetooth input to the BL20A AUX Input Use a 3 5mm audio cable to connect the BL20A and your d...

Страница 8: ......

Страница 9: ...e with a radio simultaneously Step 5 Adjust the Volume control Bass Treble control then enjoy it Note Make sure that all the cables are completely pushed into the device Q A Troubleshooting 1 Get noise when playing music Bluetooth input play mode Try to use other Bluetooth devices Weak or unstable Bluetooth signal will cause this problem try to close your device to the BL20A U Disk input play mode...

Страница 10: ...of the BL20A and the power supply are on If the input indicator light is on please check if the volume knob is at the minimum state if it is please turn up the volume Make sure that the BL20A is in the play mode you want Note Bluetooth input mode The input mode indicator light will stay on blue AUX input mode The input mode indicator light will stay on red U Disk input mode The input indicator lig...

Страница 11: ... distance without obstacles 164ft 50m Please try to change another Bluetooth audio source to test Please replug the power supply move the amplifier to another room and test it again Restart the BL20A and then try to connect again try to use another brand of mobile phone 4 Why Bluetooth is intermittent Use another Bluetooth device to have a try Ensure that there is no interference from other electr...

Страница 12: ...s DTS multi channel the BL20A supports stereo but does not support multi channel you can convert DTS to stereo Download the Foobar2000 software on the computer to convert the audio channel 8 Can t power on Long press the power switch button to power on off Make sure that the LED light on the power adapter stays on If it does not light up Unplug the power adapter from the BL20A plug the power adapt...

Страница 13: ... sure all the cables are fully connected Adjust the treble and bass control of the BL20A to achieve the right tone Please try to change the sound source and cables to test 12 Why the sound cut in and cut out Try to reduce the sound of the sound source Try to change the audio source to test Reduce the volume of the treble and bass knob on the BL20A Ensure that the positive and negative poles of the...

Страница 14: ... 15 Can I listen to two audio inputs at the same time No only one mode can be used at a time Warranty Information All Fosi Audio products 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 ...

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