Mini verzió 20W30W40W50WX2 Bluetooth 5.0 digitális teljesítményerősítő kártya gomb a hangerő beállításához kapcsolómodullal
Mini version 20W30W40W50WX2 Bluetooth 5.0 digital power amplifier board knob to adjust volume with switch module
Product parameter
Product name: Mini version 2x50W Bluetooth digital power amplifier board
Product model: ZK-502L
Adapted power supply voltage: 5~24V (optional 9V/12V/15V18V24V and other adapters, high power recommended high voltage)
Adapted speakers: 30W~200W, 4Ω, 8Ω
Number of channels: left and right dual channels (stereo)
Bluetooth version: 5.0
Bluetooth transmission distance: 15 meters (unobstructed)
Protection mechanism: self-recovery overheating protection, self-recovery short-circuit protection
Tip: Only when the audio input is enough and the power supply voltage/current is enough, there will be enough output power. The higher the power supply voltage, the higher the relative power, and speakers with different impedances will have different output powers. In the case of sufficient voltage and current, the larger the horn's ohms, the smaller the relative sound power, please pay attention!
Power supply voltage: 12V---8Ω speaker/12W (left channel) 12W (right channel), 4Ω speaker/20W 20W
15V--8Ω/18 18W, 4Ω/more than 30 30W
19V--8Ω/32 32W, 4Ω/more than 45 45W
24V--8Ω/38 38W, 4Ω/more than 50 50W
Question answer:
1. How to choose a power supply?
The power supply of the board is very important. The higher the voltage, the greater the current, and the more sufficient output power. If you only have 12V 1A, you can bring 3-4 inch speakers. If you are above 19V 5A, there is no problem with 8-10 inches, and the power supply must be highly regarded. If the voltage is too low, the amplified sound will easily cause sound distortion. If the current is too small, the speaker will pull down the voltage, which will result in abnormal operation or poor sound quality.
It is recommended to use a power supply of 18V19V24V with a current of 3A or more. If you only have a 9V12V or 1A 2A power supply, you can also use it but the power is low. Please note that when the volume is maximized, it may be distorted and affect the sound quality.
2. How to choose a speaker?
Commonly used speakers are generally 8 ohms, and the positive and negative polarities are not distinguished, and the effect is the same. 4 ohm speakers can also be used. If your speaker has a low power, it may be between 10W-30W. The power supply voltage is lower to prevent the speaker from burning after the amplified sound. For example, choose a power supply below 15V. If you are a 50W-200w speaker, don't worry about the problem of speaker burnout, you can choose a 12-24V power supply. The higher the voltage you choose, the greater the sound or power that can be output.
3. How to connect to Bluetooth?
Power on the power amplifier board, connect the speaker, turn the audio knob to light up, open the phone settings-Bluetooth-search for "BT-WUZHI", and then click connect, after the connection is successful, there will be a Ding Dong sound, this time it is In Bluetooth mode, just play music, and the phone will automatically connect back to the phone next time it is powered on.
4. It's okay if the voice is small, but when the voice becomes louder, the voice becomes muddy?
The sound is distorted, please change to a higher voltage adapter power supply.
5. It's okay if the voice is small, but when the voice becomes louder, the voice freezes?
If the input power is insufficient, the power supply itself has intermittent power failure protection, please replace with a higher power power supply; or the power is too large, the power amplifier board heats up seriously, and thermal protection occurs. Reduce power usage or strengthen heat dissipation.
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