Why buy from us?
Lorem Ipsum is simply dummy text of the printing and typesetting industry.
Ask a Question About This Product
- Stock: In Stock
- Brand: OEM
- Model: RLMSL1009
- Location: https://detail.1688.com/offer/621669836377.html
Attention: If you need a shell version, please take one for each of the two color categories. The material package for the amplifier is 4 yuan, but it is only a shell accessory!
Mini version 50Wx2 Bluetooth digital amplifier board (knob to adjust volume with switch)
Attention! The shell is a material package that needs to be purchased separately and assembled by oneself. The material package comes with a screwdriver as a gift.
Potentiometer to adjust volume, with switch for easy control of volume, very suitable for DIY speakers.
If it is a metal box, the Bluetooth antenna needs to be led out.
Using copper DC connectors, it can withstand high currents without generating heat.
The 470uf35V solid-state capacitor ensures the ability to store and dissipate electricity, and stable and continuous power supply is a prerequisite for good sound quality.
Sending DC head wires is compatible with the input power interface of this product, making it easy to connect even if you don't have a DC head adapter or battery.
5.0 Bluetooth version, with higher transmission efficiency and longer transmission distance.
Usage precautions: The power switch on the board is a standby switch. After turning off the switch, the machine will enter a low-power standby state. To completely turn off the power or not use it for a long time, you can unplug the DC plug on the machine.
Answer to the question:
How to choose a power source?
The power supply that matches the board is crucial. The higher the voltage, the greater the current, and the greater the output power. If you only have 12V 1A, you can bring a 3-4 inch speaker. If you are above 19V, there is no problem with 8-10 inches, and the power supply is highly valued. If the voltage is too low, sound amplification can easily cause sound distortion. If the current is too small to raise the speaker, the voltage will be lowered, causing abnormal operation or poor sound quality.
Recommend using an 18V19V24V power supply with a current of 3A or higher. If you only have a 9V12V or 1A 2A power supply, it can also be used, but the power is small. Please note that when using it, the volume may be distorted and affect the sound quality.
2. How to choose a speaker?
The commonly used speakers are usually 8 ohms, which can be used without distinguishing between positive and negative polarity, and the effect is the same. 4-ohm speakers can also be used. If your speaker power is low, it may be between 10W-30W, which can also be used. If the power supply voltage is lower and the speaker is burned after being turned up, for example, choose a power supply below 15V. If you have a 50W-200W speaker, you don't have to worry about the speaker burning out. You can choose a 12-24V power supply, and the higher the voltage you choose, the greater the sound or power that can be output.
3. How to connect Bluetooth?
Power on the amplifier board, connect the speaker, turn the audio knob to turn on the indicator light, open the phone settings - Bluetooth - search for "BT-WUZHI", and then connect. After successful connection, there will be a beep prompt sound, which is in Bluetooth mode. Just play music, and the next time you power on, it will automatically reconnect with the phone.
Is it okay if the sound is small, but when the sound becomes louder, there may be a phenomenon of cloudy sound?
The sound is distorted, please replace it with a higher voltage level adapter power supply.
5. It's okay if the sound is small, but when the sound becomes louder, there may be a stuttering phenomenon?
Insufficient input power supply, intermittent power-off protection of the power supply itself, please replace with a higher power supply; Or if the power is too high and the amplifier board heats up severely, there may be a situation of thermal protection. Reduce power usage or strengthen heat dissipation.
