20 Pcs PAM8403 Amplifier Board 2X 3W Super Mini Digital Power Amplifier Board Class D Audio Speaker Sound Board Amplificador Volume Control 2.5V to 5V Input with USB Power Supply

Price: $9.99
(as of Mar 05, 2025 22:00:25 UTC – Details)

Product description
Working voltage: 2.5V-5.5V（Note: The power supply voltage should not exceed 5.5V, and the positive and negative power supply should not be reversed.）
Horn matching: 4-8 Ω（recommended: 4 Ω）
Horn power: 2-8W
You can use the 5V power supply of the computer USB port, or the 5V power supply of the mobile phone charger USB port, or the lithium battery power supply
With high efficiency of 90%, 4 Ω load and 5V power supply, it can provide 3W (left channel)+3W (right channel) output power
Class D power amplifier has high efficiency, and will not affect the sound quality due to temperature rise, and does not need to add heat sink, which occupies a small volume
The power amplifier board has a built-in noise elimination circuit, so there is no popping noise when the power is turned on/off; The module has short-circuit over-current protection and over-temperature protection

Applications
LCD TV, monitor
Notebook computer
Portable speaker
Portable DVD player, game console
Mobile phone/handsfree phone

Precautions for use:
Turn on the speaker first and then the power supply, otherwise it is easy to damage the chip;
Because the digital volume control in the module has a large gain, do not let the audio signal input be too large to make the signal cut and limit.
Package Dimensions ‏ : ‎ 6.93 x 4.76 x 0.24 inches; 1.06 ounces
Item model number ‏ : ‎ PAM8403
Date First Available ‏ : ‎ March 3, 2023
Manufacturer ‏ : ‎ EC Buying
ASIN ‏ : ‎ B0BXDK8R7J
Country of Origin ‏ : ‎ China

Excellent noise suppression. Without receiving input audio, you can’t hear any noise when your ear is close to the speaker
Two-channel stereo. 5V power supply can output 3W+3W power, can directly drive 4 Ω, 8 Ω mini speakers, with high output power, sufficient energy and good sound quality
The unique Class D digital power board without LC filter can directly use the USB power supply of the computer
Double-panel wiring can properly solve the ground potential balance and crosstalk between sound channels caused by wiring. The subminiature design can easily be placed in the internal small space of various digital products, and the amplification efficiency is extremely high
The whole plate is welded by machine, and the welding quality is comparable to that of manual soldering iron welding