2.1 Channel 5.0 Power Amplifier Board Case Stereo Subwoofer Amp. It uses 6 imported disassembled Sanken tube pairs, 4 of which are responsible for the left and right channels, and the other 2 are connected to BTL circuits for subwoofer use.
eBay
Woopker Audio Amplifier AK45/AK45 Pro Max 820W HiFi Digital Stereo Channel2.0 Bluetooth Amplifier Receiver for Home Room Karaoke
Aliexpress UK
2.1 Channel 5.0 Power Amplifier Board Case Stereo Subwoofer Amp. 1 Piece High-Power Amplifier Board. The fan heater and fan heater have dual cooling, short circuit and overload protection to avoid malfunction.
eBay
WOOPKER 3.7V Amplifier Board 30W Amplifier with Remote Control Support Bluetooth AUX U-Disk MIC for 5-8Inch Speaker Car Home DIY
Aliexpress UK
【Power Amplifier】: Audio Power Amplifier is a 2.0CH speaker mini power amplifier. With LCD screen, backlight design. Support FM radio function. Rated power: 20W+20W. Made of aluminum alloy material, it is durable.
eBay
300W bluetooth Digital Power Amplifier Board 220V/50Hz EU Plug Home karaoke TF card / U disk MP3 Player Subwoofer Amplifier
Aliexpress UK
Stereo Audio HiFi Amplifier, 800W Bluetooth Amplifier 5.0, 2 Channels 12V/230V, LCD Display, SD/USB, FM Radio, Compatible with Active subwoofer and passive speakers. Advanced Bluetooth 5.0 Connectivity: Enjoy crisp, high-fidelity sound with integrated Bluetooth 5.0.
eBay
AV 555 628 999 BT Max 4000W HIFI Digital Bluetooth Audio Power Amplifier Subwoofer Sound Amplifiers For Home Car Meeting Karaoke
Aliexpress UK
Features: -It features four channels that can connect multiple speakers, providing powerful output for a fully immersive audio experience. -With Bluetooth connectivity, you can stream music from your phone, tablet or other Bluetooth-enabled device. In addition, you can also insert an SD card to play music stored on the card. -With FM radio function, you can listen to your favorite radio stations. USB function allows you to connect a USB device to play the music stored on it. -With volume control, bass and treble adjustment, it can enhance your listening experience and provide you with multiple options to enjoy your favorite music. -With colorful lights, it can bring dynamic audio-visual effects and add a pleasant atmosphere. .
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1600W Peak Power HiFi Sound Amplifier Digital 4 Channel Audio Amplifier Bluetooth Karaoke Player FM Radio Support Remote Control
Aliexpress UK
(Long the MODE button to start recording, long the MODE button again to cancel recording and play the recording file; in recording mode, you need to connect a storage device U disk or TF card;). Support folder selection playback.
eBay
Woopker Digital Amplifier AK55 Audio Bass Audio Power Bluetooth Home Amplifier Hifi FM Auto Music Subwoofer Speakers USB SD Mic
Aliexpress UK
If your existing DC power plug is not 5.5mmx2.1mm, there is no problem, because we include a DC adapter in the product. Stable Performance: Bluetooth digital power amplifier module features Bluetooth 5.0 with a transmission distance of up to 49 feet (unobstructed).
eBay
2x50W Bluetooth 5.0 Amplifier Kit with Black Case & Remote, DC 7-22V for Car Home Audio FiiO HiFi Powerful Sound Subwoofer Amp
Aliexpress UK
Amplifier type: HIFI amplifier. 【Power Amplifier】: Audio Power Amplifier is a 2.0CH speaker mini power amplifier. With LCD screen, backlight design. Support FM radio function. Made of aluminum alloy material, it is durable.
eBay
Auto-partner Car / Camper vans / Boat HiFi Audio Amplifier Digital Bluetooth AMP RMS 70W+70W Channel 2.0 Input FM Radio AK55
Aliexpress UK