Key benefits Flexible power and connection options: combines a terminal block and a DC 2.1 mm socket, compatible with most laptop power ports, and can directly connect to wireless 5.0 devices. Supports driving a variety of speakers. Robust protection and reliability: acrylic protective cover with reverse connection protection, overvoltage protection, undervoltage protection, over temperature protection, short circuit protection, and selfrecovery overheating protection to reduce risk during use. Clear audio processing and easy control: builtin filter capacitor aids audio signal processing; a knob potentiometer provides convenient control of power on/off and V / V settings. Versatile amplification and inputs: two amplifier boards with 20 W, 30 W or 50 W ratings, designed for 4 to 8 ohm speakers; supports stereo audio input and AUX input for flexible sources. Durable design and practical build: acrylic protective cover enhances durability while allowing access to controls and connectors for maintenance or upgrades. Product features and specifications Power and compatibility Terminal block and DC 2.1 mm socket for power connections Compatible with most laptop power ports Direct connection option for wireless 5.0 Two amplifier boards available at 20 W, 30 W or 50 W Suitable for 4 to 8 ohm speakers Protection and safety Acrylic protective cover Reverse connection protection Overvoltage and undervoltage protection Over temperature protection with selfrecovery Short circuit protection Signal processing and control Builtin filter capacitor for audio signal processing Knob potentiometer for convenient adjustment of power on/off and V / V Inputs and outputs Stereo audio input AUX input Supports pairing with various speakers (4–8 Ω) Use scenarios Home stereo or desktop setup Build a compact stereo system by mounting the amplifier module under a pair of 4–8 ohm speakers Connect a wireless 5.0 source or computer via the AUX or stereo input Use the front knob to power the unit on and adjust the signal levels as needed Small classroom or presentation venue Create a lightweight PA system for multimedia presentations Power from a laptop or standard DC supply via the 2.1 mm socket Drive two passive speakers with clear amplification and builtin protections for safe operation DIY audio projects and enclosures Integrate into a custom project enclosure with an acrylic cover for visibility and protection Choose 20 W, 30 W, or 50 W boards to match speaker impedance and desired volume Use AUX or stereo input to connect multimedia players, PCs, or other audio sources Notes This module is designed to work with 4–8 ohm speakers and supports stereo and AUX inputs. The acrylic protective cover provides durable protection while enabling straightforward access to connectors and controls. The power input options include a terminal block and a DC 2.1 mm socket for compatibility with common power sources.