01. Get noise when playing music? 

• Bluetooth input mode: Try to use other Bluetooth devices. Weak or unstable Bluetooth signal will cause this problem, try to place your device nearer to the BT20A PRO. 

• RCA input mode: Please change the audio cable to try. 

•Try another RCA cable and make sure the audio cable is connected correctly. 

• Please unplug the RCA cable from the amplifier, and then turn it on to try.

• Please change the audio source or other brand devices to try. 

• Did you set the "treble" gain to the max? please turn the "Treble" gain down. 

• Make sure all cables are all securely in place and correctly connected. 

• Please keep this device away from other electronic devices.

02. All cables are connected, but there is no audio output? 

• Check to make sure the indicator lights on the front panel of the BT20A PRO and the power supply are both on. 

• If the indicator light is on, please check if the volume knob is at the minimum level. If yes, please turn up the volume. 

• Make sure that the BT20A PRO is set to the input mode you want. 

Note: Bluetooth input mode (The input mode indicator light will stay on blue) 

RCA input mode (The input mode indicator light will stay on red) 

Input priority: The Bluetooth input mode first. 

• Please check if the audio source is paused. 

• Please try to change the sound source, cables, and speakers. 

• Try restarting both your device and BT20A PRO, then connect again. 

NOTE: Make sure that all the cables are completely pushed into the device.

03. My Bluetooth device can’t be paired with the BT20A Pro? 

• Check to make sure the BT20A PRO is powered on and the LED light on the power adapter stays on. 

• Ensure that the BT20A PRO is not paired with another device.

• Make sure that the distance between your device and the BT20A PRO is not too far, place your device nearer to the BT20A PRO. 

• Make sure there are no obstacles between your device and the BT20A PRO. Obstacles will affect the Bluetooth operation distance. 

• Please try to change to another Bluetooth audio source to test. 

• Please replug the power supply, move the amplifier to another room and test it again. 

• Restart the BT20A PRO and then try to connect again, try to use another brand of mobile phone or device.

04. Why the sound is intermittent in Bluetooth mode? 

• Use another Bluetooth device to have a try. 

• Ensure that there is no other electronic equipment between the BT20A PRO and the audio source which may cause interference. 

• Put your device closer to the BT20A PRO. 

• Replug the power supply. 

05. One channel does not work? 

• Please test whether the Bluetooth and AUX inputs have the same problem first. 

• If these two modes have the same problem, swap the speaker cables of the left and right channels, or change to use another speaker, and then test whether this channel still does not work; 

• If only AUX mode does not work, change the audio source, change the audio cable, and test again, and make sure that the audio source and cables both deliver stereo sound, not MONO. 

06. Can’t be powered on? 

• Make sure that the LED light on the power adapter stays on. 

• If it does not light up: Unplug the power adapter from the BT20A PRO, plug the power adapter directly into the AC power source, and see if the LED will light up. If it still does not light up, there may be a problem with the power adapter. Please contact us to replace the power adapter. 

• You can use a DC 24V-48V power adapter of a camera or router to connect the BT20A PRO to test whether it can be turned on.

07. The BT20A Pro can be used as a pre-amp?

• Yes. There is a PRE-OUT port on the rear panel, which allows it to be used as a preamplifier. 

08. Sound quality is not good? 

• Make sure all the cables are fully connected. 

• Adjust the treble and bass control of the BT20A PRO to find the right tone. 

• Please try to change the sound source and cables to test.

09. Why does 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 gain of the treble and bass knob on the BT20A PRO. 

• Ensure that the positive and negative poles of the speaker output do not touch together. Some relatively large banana plugs are easy to touch together and cause a short circuit. 

10. Does the BT20A PRO support Bluetooth aptX and Low Latency? 

• No. The BT20A PRO does not support Dolby, aptX, aptX HD or aptX Low Latency. 

11. Can this amp be left on all the time? 

• It can be connected all the time and it is safe without power consumption. 

12. Can I listen to two audio inputs at the same time? 

• No, only one mode can be used at a time.