Description
High Precision 4 Channel Stereo Amplifier TDA7377 Amplifier Board Stereo Surround Input PCB Power Amplifier
Product Description
How to determine the source of noise:
First of all, we must ensure that the power supply of the power amplifier is pure. The generators of some cars have a lot of interference, which will bring impure power supply. The judgment method is whether to start the engine during the test sound to determine the source of the noise, and the generator interference with the power amplifier cannot be solved;
How to judge the noise floor:
After the power amplifier is powered on, the speaker is directly connected to the audio input and the audio input is short-circuited. If the speaker is noisy, this is the noise floor of the amplifier. If you connect a computer or mobile phone, there will be noise, then this is not a problem with the amplifier. If it is used with other circuits (decoder board, tone board, etc.), it is recommended to use an independent power supply (or transformer independent winding) to avoid noise to a certain extent.
Specification
|
item
|
value
|
|
Product name
|
TDA7377 four-channel power amplifier board
|
|
Chip type
|
TDA7377*1
|
|
Input voltage
|
DC 8-18V
|
|
Output power
|
4*10W 2 ohm MAX
|
|
Channels
|
Four-channel surround sound
|
|
Output impedance
|
4-8 ohms
|
|
Frequency response
|
20Hz- 20KHz
|
|
Speaker recommendation
|
each channel 3-6.5 inches 4-8 ohms within 50W
|
Installation Instructions
REM terminal usage instructions 1: This terminal is effective at high level, and it is divided into two wiring methods for car and ordinary household. The left picture shows the ordinary household connection method. The REM terminal needs to be connected to the positive electrode together, otherwise the power amplifier board will not work;
REM terminal instructions 2:
Blue line-control terminal For car use, please connect the car REM terminal (also called the control line), so that it can be switched on and off synchronously with the car key;
2-in/4-in switch: The position switches shown in the figure are all in the 0N position, which is a 2-channel input and 4-channel output mode. The output sound of the two left and right channels is the same, which is equivalent to a stereo mode with a widened sound field. If the switch is set to the other side, the four channels are independent and do not affect each other.
Details Images