HiFi Stereo Bluetooth 5.0 Digital Power Amplifier USB Music Player — 2/4 Channel Home, 50W*4, Multiple Modes

Flexible CH3/CH4 operation: In output mode the amplifier’s 4 speaker sockets can drive two pairs of speakers. CH3/CH4 outputs can also be linked to another M4 amplifier to extend the system — multiple amplifiers and speaker sets can be daisy-chained so the same signal is shared across several rooms. In input mode CH3/CH4 map inputs directly to outputs (for example, the CH1 speaker socket will reproduce the signal fed into CH1), allowing simultaneous connection of two stereo sources or four mono inputs. Inputs and playback: Supports two wired stereo RCA inputs plus wireless Bluetooth 5.0, making it compatible with phones, computers, TVs, MP3 players and CD players. A U-disk slot turns the unit into a digital music player supporting MP3, WAV, APE, FLAC and WMA lossless formats. Outputs and control: All four speaker sockets can play at the same time, each channel featuring its own independent volume control. Power and performance: Maximum output reaches 50W*4 and the amplifier is supplied with a high-quality 24V/4.5A power adapter, sufficient to drive most home speakers. Design and reliability: Compact, logical circuit layout, concise wiring and premium components deliver HiFi clarity and long-term stable operation. The small-signal and large-signal circuits are separated for improved protection. Bluetooth is implemented without an external antenna for a clean, practical appearance.