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

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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

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.

30W Direct-Coupled MOSFET Power Amplifier Board, Pure Class A Audiophile Grade, Pure Power Amplifier PCB Finished Product

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