This QSC MX 3000a power amplifier comes with a correct power supply. A minor issue to note is that the screws for the bare wire inputs are missing.

Using this QSC MX 3000a power amplifier is easy. First, connect it to the correct power supply. Then, you can connect your audio devices to it. Just be aware that the screws for the bare wire inputs are missing, so you may need to find suitable replacements. When it comes to maintenance, keep it in a dry and clean place. Don't expose it to excessive heat or moisture. Also, make sure to turn it off when not in use to save energy and prolong its lifespan.