HiFi Bluetooth 5.0 Digital Power Amplifier with USB Music Player — 2/4 Channel, 50W*4, Easy Installation

Compact HiFi power amplifier featuring Bluetooth 5.0, USB (U-disk) playback and selectable 2/4 channel operation for home use. Four speaker output groups allow simultaneous connection to up to two pairs of passive speakers or to active speakers. Each of the 4 outputs has its own volume control so channels can be balanced independently. Flexible I/O: supports two wired stereo RCA inputs plus wireless Bluetooth 5.0, making it compatible with phones, computers, TVs, MP3 players, CD players and similar sources. The U-disk input functions as a digital music player and plays MP3, WAV, APE, FLAC and WMA files. CH3/CH4 behavior and routing: when used as outputs, CH3/CH4 provide four speaker sockets that can drive two pairs of speakers. They can also feed an additional M4 amplifier so multiple amplifiers and speaker sets can be daisy-chained to distribute one signal across several rooms. When CH3/CH4 are used as inputs, each input maps to its corresponding output (for example, the CH1 speaker socket will reproduce the signal applied to the CH1 input), allowing two stereo sources or four mono sources to be connected and used at the same time. Power and build: rated maximum output 50W*4 and supplied with a quality 24V/4.5A power adapter capable of driving most home speakers. The unit uses a tidy circuit layout, concise wiring and high-grade components to deliver clear HiFi sound and long-term stable performance. Small- and large-signal circuits are separated for improved protection. The Bluetooth module is integrated without an external antenna for a clean, practical appearance.