23W ultra-miniature digital amplifier board module, Class D PAM8403, high efficiency, 2.5～5V, USB powered.

Bluetooth Amplifier Board Module 2x50W Digital Stereo Audio Amp Board Dual Channel DC 5V-27V with HiFi Filter

Tpa3118dd2 Subwoofer Amplifier Board 30wx2+60w Hifi 2.1 High Power

TPA3118 PBTL 60W DC 8-24V Mono Digital Audio Amplifier Board AMP Module Chip 1X60W 4-8 Ohms Replace TPA3110 for Arduino

DC 12V Mini HiFi Audio Power Amplifier - Portable Dual Channel Stereo Audio Receiver - Black

TPA3118 PBTL 60W DC 8-24V Mono Digital Audio Amplifier Board AMP Module Chip 1X60W 4-8 Ohms Replace TPA3110 for Arduino

Bluetooth Amplifier Board Module ZK-502L 5.0 Bluetooth 2 50W Digital Amplifier Board (DC15-36V)--DTEKGAZ

Adjustable low-pass and high-pass filter, solderless, for high-power 400W KTV stage speakers.

High-end digital audio amplifier board, 18W mono audio amplifier module, DIY modification for 6-12V active speakers

Passive tuning board, preamp board with high and low frequency adjustment, DIY audiophile HiFi speaker amplifier preamp module.

Bluetooth 2.0 digital amplifier board, 12V dual-channel stereo speaker kit (DIY kit), with remote control, 2 x 50W

Upgraded HT21MAX 2.1 channel Bluetooth amplifier board, high power 200W2 + 400W, high and low frequency adjustment.

High-fidelity passive crossover for DIY home audio setup, two-way bookshelf speaker with high/low frequency response

23W Bluetooth amplifier board, Bluetooth module, MP3 decoding board, stereo Bluetooth player box, 3.7V.

DIY lossless audio speaker system with 230W Bluetooth decoder, stereo amplifier board, color screen and recording/call function.

High-fidelity, high-power, audiophile-grade DC3-12V headphone amplifier board, mini two-channel power preamplifier board

Miniature Bluetooth amplifier board with 250W high power stereo audio amplification module, compatible with USB flash drives, sound cards and remote controls.

TDA2050 Audiophile HiFi Digital Amplifier Board, 30W Mono Audio Power Amplifier Module, 12-24V DC Power Supply

Bluetooth 5.0 digital amplifier board with rechargeable lithium battery PAM8403, dual channel 2 x 5W, USB flash drive and TF card switch

The electronic volume control module has an onboard 3W digital audio amplifier board with buttons for adjusting volume.