Q&A
1. How to choose a power supply?
The power adapter for the amplifier board is important. Higher voltage and higher
current will bring be�er output power. If you use a 12V 1A power adapter, the
amplifier board can only drive 3-4in speakers. If you use a 19V 5A or higher voltage
power adapter, then it can drive 8-10in speakers. We recommend using a good power
adapter to work with this amplifier board.
Note
：
If the power supply voltage is low, the concert will be distorted a�er turning up
the volume. If the current is low, it will not be able to drive your speakers, it may not
work properly or the sound quality is not good. When this happens, please replace the
larger power adapter.
We recommend using a power adapter higher than 3A for 100wa� x 2. 50wa� x 2 is
recommended to use a power adapter higher than 2A.
2. How to choose a speaker?
Suitable for 4-8Ohm speakers. If your speaker power is 20wa�-50wa�, you can also
use our power amplifier board, but the specifica�on of the power adapter is preferably
below 15V, in order to prevent the speaker from being burned a�er turning up the
volume.
If your speaker power is 50wa�-300wa�, don't worry about anything. You can use a
19-24V power adapter, high voltage brings powerful output.
3. How to choose Bluetooth or AUX audio input mode?
Connect the power adapter, Bluetooth amplifier board and speakers. Turn on the
switch of the power amplifier board, the blue indicator light is on. Turn the audio knob
to nine o'clock. Use your phone's Bluetooth to search for "BT-WUZHI", there will be a
beep when the connec�on is successful. The next �me you use the Bluetooth amplifier
board, it will automa�cally connect to your phone.
Note:
Please ensure if there another device has paired with this amplifier board. This
amplifier board can only be paired with one Bluetooth device at the same �me. If
another device has paired with it, your device can not pair with it.
If you use 3.5mm AUX input, you need to disconnect Bluetooth. A�er hearing the
beep, insert the audio cable to play music. When using 3.5mm AUX input, if Bluetooth
is connected, it will be converted to Bluetooth input.
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