This QSC MX 3000a 2 - Channel Power Amplifier comes with a correct power supply. However, please note that there are no screws for the input posts.

Using this QSC MX 3000a power amplifier is easy. First, connect it to the correct power supply as it comes with one. Then, connect your audio sources to the input ports. Just make sure you use some screws to secure your connections to the input posts since the product doesn't come with them. When it comes to maintenance, keep it in a cool and dry place. Don't expose it to excessive dust or moisture. If you're not using it for a long time, unplug it from the power source. That way, you can ensure it works well for a long time.