One group of stereo RCA (CH3 and CH4) can be used as audio input or output by switching the selector, to acheive different demands
Supporting wired 2 groups of stereo RCA and wireless Bluetooth 5.0 input, compatible with most common audio device such as phones, computers, TVs, MP3, TV, CD players etc. With U-disk input, it can be used as a digital music player, supporting MP3, WAV, APE, FLAC and WMA lossless formats.
With 4 groups of speaker sockets output, they can output at the same time and each channel with independent volume control. Its max output power can reach 50W×4, and equipped with high-quality 24V/4.5A power supply, enough to drive most home speakers.
Reasonable circuit layout, concise wiring and high-quality components to ensure HiFi clear sound and long time stable work. Separate design of small and large signal circuit for better circuit protection. Bluetooth 5.0 version with high-gain antenna, ensure more stable and faster transmission.
Propersize with exquisite appearance, aluminum alloy case is CNC machined and with anodizing process, more fashionable and durable, very suitable for home, office and desktop audio system use.
![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](http://geotronics.us/cdn/shop/files/618e5MV9XwL._AC_SL1500.jpg?v=1763602662&width=1445)
![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](http://geotronics.us/cdn/shop/files/71JiOISGTZL._AC_SL1500.jpg?v=1763602662&width=1445)
![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](http://geotronics.us/cdn/shop/files/71gaBi6tw6L._AC_SL1500.jpg?v=1763602662&width=1445)
![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](http://geotronics.us/cdn/shop/files/710cJAw2iLL._AC_SL1500.jpg?v=1763602662&width=1445)
![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](http://geotronics.us/cdn/shop/files/71W1_jDQFML._AC_SL1500.jpg?v=1763602662&width=1445)
![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](http://geotronics.us/cdn/shop/files/71FqaXje9SL._AC_SL1500.jpg?v=1763602662&width=1445)
![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](http://geotronics.us/cdn/shop/files/819Mp5eCBgL._AC_SL1500.jpg?v=1763602662&width=1445)
![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](http://geotronics.us/cdn/shop/files/81_GThmhUpL._AC_SL1500.jpg?v=1763602662&width=1445)
![4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]](http://geotronics.us/cdn/shop/files/71Iud5nRYdL._AC_SL1500.jpg?v=1763602663&width=1445)