ZK-1002L Mini HIFI Power Amplifier Board bluetooth 5.0 High Power 100W 2.0 Dual-channel Stereo Sound Module COD

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ID: 1769002
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                    1. 5.0 bluetooth version, transmission efficiency is higher, transmission distance is longer.

                    2. Large size black gold heat sink ensures efficient heat dissipation.

                    3. Potentiometer to adjust the volume, with a switch, it is easy to control the volume, very suitable for DIY speakers.

                    If it is a metal box, you need to draw out the bluetooth antenna.

                    4. Copper DC connector is adopted to withstand high current and no heat.

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

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

                    Notes for use: The power switch on the board is standby switch, and the machine is in standby state with low power consumption after the switch is turned off. To completely turn off the power or to remove the DC plug on the machine for a long time, it is ok.


                    Product Name: with filter mini 2x100W Bluetooth digital power amplifier board
                    Product model: ZK-1002L
                    With or without filter: Yes
                    Adaptation supply voltage: 5~24V (optional 9V/12V/15V18V/24V adapter, high power recommended high voltage)
                    Adapter speaker: 50W~300W, 4Ω~8Ω
                    Number of channels: left and right stereo (stereo)
                    Bluetooth version: 5.0
                    Bluetooth transmission distance: 15 meters (without occlusion)
                    Protection mechanism: overheating, short circuit protection.
                    Tip: To have enough output power if the audio input is sufficient and the supply voltage/current is sufficient The power supply voltage is higher and the relative power will be larger.
                    The speakers with different impedances will have different output power In the case of sufficient voltage and current, the larger the ohms of the horn, the smaller the relative sound power Please pay attention!
                    Power supply voltage: 
                    12V 8 ohm speaker / 24W (left channel) + 24W (right channel), 4
                    ohm speaker / 40W + 40W
                    15V 8 ohms / 32W + 32W, 4 ohms / greater than 60W + 60W
                    19V 8 ohms / 64W + 64W, 4 ohms / greater than 80W + 80W
                    24V 8 ohms / 72W + 72W, 4 ohms / greater than 10OW +10OW

                    Question answers:

                    1. How to choose the power source?
                    A: The board's power supply is the key.The higher the voltage, the greater the current, the more power output, if you only have 12V 1A, this can carry 3-4 inch speakers.If you are above 19V 5A, with 8-10 inches no problem, power must be highly regarded.If the voltage is too low, the sound will easily cause distortion after amplification. If the current is too low to carry the speaker, the voltage will be pulled down, and the work will be abnormal or the sound quality will be poor.
                    It is recommended to use 18V19V24V power supply with current above 5A.If you only have 9V12V or 1A 2A power supply, you can also use it with low power. Be careful when using it at the maximum volume, it may cause distortion and affect the sound quality.

                    2. How to choose the speaker?
                    A: Common speakers are usually 8 ohms, can not distinguish between positive and negative polarity, the effect is the same, 4 ohms can also be used.If your horn power is small, it may be between 10W and 30W can also be used. The power supply voltage is small to prevent the speaker from burning down after playing loudly. For example, choose the power supply below 15V.If you are a 50w-300w speaker, don't worry about the speaker burning problem, you can choose a 12-24v power supply, the higher the selected voltage, then the greater the output sound or power.

                    3. How to connect bluetooth?
                    A: Power up the power amplifier board, connect to the speaker, rotate the audio knob indicator light, turn on the phone Settings -- bluetooth -- search to "bt-wuzhi", and then click connect, after connecting successfully, there will be ding dong prompt sound, at this time for bluetooth mode, play music can, next time on the power will automatically connect back with the phone.

                    4. It's ok if the sound is small, but when the sound becomes larger, the sound will be turbid.
                    A: The sound has been distorted. Please replace the adapter with a higher voltage level.

                    5. It's ok if the voice is small, but when the voice becomes louder, the sound will slow down.
                    A: The power of the input power is insufficient, and the power supply itself is intermittent power failure protection, please replace the power supply with higher power;Or the power is too large, the power amplifier plate heat serious, there is a thermal protection situation, reduce the power use or strengthen heat dissipation.

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