The M273 Amplifier Board combines a PT2399 based module with an NE5532 amplifier stage to blend vocal and music signals smoothly and clearly. Key features and benefits Clear vocal and music blending: PT2399 and NE5532 based design enhances voice and backing tracks for balanced sound. Flexible compatibility: Works with various digital amplifier boards as long as the power voltages match, enabling easy integration with existing audio setups. Versatile power options: Supports DC 12 24V or AC 5 12V power supplies for different powering environments. Microphone compatibility: Compatible only with dynamic microphones; not suitable for condenser mics or headset mics. 2 3 practical use scenarios Home karaoke setup: Pair with a small digital amplifier to mix your voice with backing tracks for a cleaner, more natural result. DIY karaoke station for venues: Integrate with a digital amp board to deliver reliable voice and music balance for events in bars or cafes. Portable karaoke rig: Run from a 12V supply or battery for on the go performances and outdoor uses. Note Compatible only with dynamic microphones; not suitable for condenser mics or headset mics.