HiFi sound with low noise The amplifier delivers clear, fidelity sound with no audible noise. The circuit has been optimized to maintain clean output even at maximum power. Power and performance Uses the TPA3116 chip for stereo amplification. Maximum power: up to 50W total. With a 12V 5A supply, the actual output is about 30W per channel into 4 ohms. Built for reliable performance with efficient class D operation. Flexible input options for broad compatibility 3.5 mm stereo input for quick connection to most devices. USB audio input for digital playback from compatible USB sources. Bluetooth 5.0 for wireless streaming from phones, tablets, and other Bluetooth devices. RCA input (RCA) for legacy audio components. TF card input for direct playback from microSD cards. USB input (OTG) to connect to computers, mobiles, or OTGenabled devices. Connectivity guidance The USB audio input and OTG support allow easy connection to a computer, smartphone, or tablet. Bluetooth 5.0 provides wireless streaming with a stable connection and wider compatibility. Use scenarios Home stereo or living room setup: Pair a Bluetoothenabled source with the amplifier and drive a pair of 4ohm speakers for clean, quality audio without extra noise. Desktop or office audio upgrade: Connect via USB audio or 3.5 mm input to enhance computer or laptop speakers with higher fidelity and more power. Portable media playback or multimedia hub: Use TF card or USB input to play music directly, or connect to OTGenabled devices for flexible playback options. Compatibility and practicality Designed to work with a variety of sources including computers, smartphones, Bluetooth devices, USB drives, and TF cards. Suitable for applications in home audio, computer desks, small rooms, or compact multimedia setups. Notes Power requirements: 12V 5A power supply recommended to achieve the stated performance. 4ohm speaker compatibility is specified for the 30W per channel range. Higher impedance speakers may require different outputs.