The Vocopro DA-4000FX Digital Karaoke Amplifier is the perfect addition to any karaoke party. With its powerful sound and sleek design, it’s sure to impress your guests and make your singing sound amazing. This karaoke mixer comes with a variety of features, including an amplifier, that make it easy to use and transport. Whether you’re a professional musician or just looking for a fun way to spend an evening with friends, the Vocopro DA-4000FX Digital Karaoke Amplifier is a great choice. It’s made by a trusted brand, VocoPro, and is designed to provide high-quality sound and performance. I powered the unit on and pushed all the buttons and everything appears to work as it should. Did not hook to any other components to just a simple power test.