Hifi-level 2.0 stereo Bluetooth digital power amplifier board TPA3116 50WX2 speaker audio amplification with filter

Tip: Only when the audio input is sufficient and the supply voltage/current is sufficient can there be sufficient output power. The power supply voltage is higher, the relative power will be larger, and the horn with different impedance will have different output power. In the case of sufficient voltage and current, the greater the number of horn ohm, the smaller the relative sound power, please pay attention!

Power supply voltage: 12V ------ 8 ohm speaker /12W(left channel) + 12W(right channel), 4 Ohm speaker /20W+ 20W
15V ----- 8 EUR /18 + 18W, 4 EUR/greater than 30 + 30W
19V ------8 EUR /32 + 32W, 4 EUR/greater than 45 + 45W
24V ------8 EUR /38 + 38W, 4 EUR/greater than 55 + 55W
AUX audio input + Bluetooth 2-in-1 HIFI level with filter 50Wx2 Bluetooth digital power amplifier board

Band filtering
Attention! The heat sink with 3M glue needs to be pasted to the chip itself, refer to the description picture, the hotter the more sticky the better thermal conductivity. The case version needs to assemble the case itself, and the case version comes with a screwdriver.
This product is full of materials, mainly high performance, high price, specially for HIFI music to provide high quality power amplifier.
TPA3116D2 is a Class D power amplifier IC launched by TI company, with very high index parameters. The modulation frequency can reach up to 1.2MHZ, and the high-power output distortion is less than 0.1%.
With AUX and Bluetooth two sound source input methods, two in one;
Potentiometer to adjust the volume, with switch, easy to control the volume, very suitable for DIY speakers.
With filter inductance, the sound is round and clear.
Copper DC connector, fence terminal, withstand large current, no heat, no wire damage, good wiring, not easy to short circuit.
The DC head wire can be compatible with the input power interface of this product, even if you do not have a DC head adapter or battery, it can be easily connected.
5.0 Bluetooth version, higher transmission efficiency, longer transmission distance.
Note for use: The power switch on the board is the standby switch, and the machine is in low-power standby state after turning off the switch. To completely turn off the power or if it is not used for a long time, the DC plug on the machine can be unplugged.

Answer to questions:

1. How to choose the power supply?

The power supply of the board is critical. 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 more, there is no problem with 8-10 inches, and the power supply must be highly valued. If the voltage is too low, the sound amplification is easy to cause sound distortion, if the current is too small to bring up the speaker will pull the voltage down, the work is abnormal or the sound quality is poor.

Recommended to use 18V19V24V power supply, current above 3A. If you only have a 9V12V or 1A 2A power supply, it can also be used but the power is small, pay attention to the maximum volume when using may distort the sound quality.

2. How to choose a speaker?

Commonly used horns are generally 8 ohms, can not distinguish between positive and negative polarity, the effect is the same, 4 ohms of the horn can also be used. If your horn power is small, may be between 10W-30W can also be used, the supply voltage is small to prevent loud after burning the horn, such as choose a power supply below 15V. If you are a 50W-200w horn, do not worry about the problem of the horn burning, you can choose 12-24V power supply, the higher the selected voltage, then the greater the output sound or power.

3. How to select Bluetooth or AUX audio input mode?

Power on the power amplifier board, connect the speaker, turn the audio knob blue indicator light, open the phone Settings -- Bluetooth -- search for "BT-WUZHI", and then click connect, after successful connection, there will be a ding dong prompt tone, at this time for Bluetooth mode, you can play music, the next power will be automatically connected back to the phone.

If you want to use AUX audio input, you can disconnect the Bluetooth connection, there will also be a sound prompt, plug in the audio cable to play music. IN AUX (LINE IN) mode, Bluetooth is automatically converted to Bluetooth mode.

4. Small sound is OK, after the sound becomes louder, there is a phenomenon of cloudy sound?
The sound is distorted, please change the power adapter with higher voltage level.

5. Small sound is OK, after the sound becomes louder, there is a phenomenon of sound lag?
The input power is insufficient, the power supply itself intermittently power off protection, please replace a more powerful power supply; Or the power is too large, the power amplifier board is heated seriously, and thermal protection appears, reducing the use of power or strengthening heat dissipation.