This QSC 2-channel power amplifier comes with a correct power supply. However, please note that the grille has some dents as shown in the photos.

Using this QSC power amplifier is easy. First, make sure you connect it to the correct power supply that comes with it. Then, connect your audio sources to the amplifier. When using it, avoid placing it in a very hot or humid place. As for maintenance, keep it clean by gently wiping it with a dry cloth regularly. And remember, due to the dented grille, be a bit more careful when moving it around to prevent further damage.