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.
This small mono amplifier is surprisingly powerful - it can deliver 3.2 watts of power to a 4 ohm impedance speaker (5V power @ 10% THD). Inside the miniature chip is a Class D controller, capable of running from 2.7V to 5.5VDC. Since the amp is a class D, it's incredibly efficient - making it perfect for portable and battery-powered projects.
TDA8954TH Class D Audio Amplifier Module (2 x 420 W)
TDA8954TH Dual Chip Audio Amplifier Module (24 V, 2 x 420 W)
This slim little board has a class D amplifier onboard that can drive 2 channels of 4-8 ohm impedance speakers at 20W each.
TPA6120 High Fidelity Stereo Headphone Amplifier Module
PJRC Shield with Audio Amplifier, Flash Memory and Led Driver for 3.2 Teensy and Teensy-LC
TDA3116D2 Audio Amplifier Module 2 x 100 W (12 - 24 V)
TPA3116D2 Class D Audio Amplifier Module (2 x 120 W)
High gain audio amplifier based on the LM386 integrated circuit.
FeatherWing Adafruit Music Maker is an enhanced version of the other FeafWing Adafruit products because it has a 3W amplifier integrated. This includes the VS1053, a coding / decoding chip that can decode a wide range of audio formats such as MP3, AAC, Ogg Vorbis, WMA, MIDI, FLAC, and WAV (PCM and ADPCM).
TPA3116D2 Audio Amplifier with Tone Control Panel, 2 x 80 W (12 - 24 VDC or 12 - 17 VAC)
TPA3116D2 2.1 Audio Amplifier Module (2x80 W + 100 W)