This electret microphone module is a high-quality amplifier. It has a single/dual input of 20dB. This is useful in recording sounds, applicable to portable audio devices such as laptops, cell phones, and handheld computers. Voltage: 2.7 V to 3.6 V
The PAM8610 audio amplifier is used for multimedia speaker systems, boom boxes, and other musical instruments. This audio amplifier is ideal for portable applications.
TPA6120 High Fidelity Stereo Headphone Amplifier Module
This slim little board has a class D amplifier on board that can drive 2 channels of 4-8 ohm impedance speakers at 20W each.
This is a 2-channel 3 W miniature class D audio amplifier based on PAM8403 chip. This is a highly efficient filter-free amplifier board which is great for adding the audio capability to your projects. It is very easy to use.