100W * 2 mini version 50W80W high power 5.0 blue tooth power amplifier board with knob to adjust the volume switch 1002L

Mini version 100Wx2 Blue tooth digital power amplifier board (knob to adjust the volume with switch)

Attention! The shell is a material package, which needs to be assembled by itself. The material package is given a screwdriver.

1.5.0 the Blue tooth version, the transmission efficiency is higher and the transmission distance is longer.

2. Large volume black gold heat sink to ensure efficient heat dissipation.

3. The potentiometer adjusts the volume, with a switch, which is convenient to control the volume, which is very suitable for DIY speakers.

If it is a metal box, you need to pull the Blue tooth antenna out.

4. The copper DC connector is adopted, which can withstand large current and does not generate heat.

5, 4*470uF green gold capacitor, to ensure the storage capacity, continuous and stable power supply is the premise of good sound.

6. The complimentary DC head with cable can be compatible with the input power interface of this product, even if you don't have a DC head adapter or battery, it can be easily wired

Precautions for use: The power switch on the board is a standby switch. After the switch is turned off, the machine is in a low-power standby state. It is necessary to completely turn off the power or unplug the DC plug on the machine for a long time.

Question Answer:

1. How to choose the power supply?

The power supply of the board is very important. The higher the voltage, the greater the current and the more sufficient the output power. If you only have 12V 1A, you can bring 3-4 inch speakers. If you are 19V 5A or above, there is no problem with 8-10 inches, and the power supply must be highly valued. If the voltage is too low, it is easy to cause sound distortion after sound amplification. If the current is too small, the horn will pull down the voltage, which will cause abnormal use or poor sound.

recommend use 18V19V24V power supply, current 5A or more. If you only have a 9V12V or 1A 2A power supply, you can also use it, but the power is low. Note that when using the volume, it may be distorted and affect the sound.

2. How to choose the speaker?

Commonly used speakers are generally 8 ohm, can not distinguish between positive and negative polarity, the effect is the same, 4 ohm speakers can also be used. If your horn power is small, it may be between 10W and 30W. The power supply voltage is smaller to prevent the horn from burning after amplifying the sound. For example, choose a power supply below 15V. If you are a 50W-300W speaker, you don't have to worry about the problem of burning out of the speaker. You can choose a 12-24V power supply. The higher the voltage, the greater the output sound or power.

3. How to connect blue tooth?

Power on the power amplifier board, connect the horn, turn the audio knob indicator light on, turn on the mobile phone settings-blue tooth-search for "BT-WUZHI", and then click connect. after the connection is successful, there will be a ding dong tone. at this time, it is blue tooth mode, just play music, and the next power-on will automatically connect with the mobile phone.

4. It's okay to have a small voice. After the voice becomes louder, the voice becomes turbid?

The sound is distorted, please change the adapter power supply with a higher voltage level.

5. It's okay to have a small voice. After the voice becomes louder, there will be a sound jam?

The input power supply is insufficient, and the power supply itself is intermittently powered off. Please replace the power supply with a higher power supply. If the power is too large, the power amplifier board heats up seriously, and thermal protection occurs. Reduce power use or strengthen heat dissipation.