This Studiomaster Diamond Club 12-2 Mixer comes with a correct power supply. However, it has a few known issues. Some fader caps are missing, and one fader is bent. Most of the remaining fader caps are broken at the part that attaches them to the fader's metal.

Using this Studiomaster Diamond Club 12 - 2 Mixer is straightforward. First, make sure you connect it to the correct power supply included. When using the faders, be careful as one is bent and many caps are broken. Don't apply too much force to avoid further damage. For maintenance, keep it in a dry and clean place. Wipe it gently with a soft cloth from time to time. If you need to replace the fader caps in the future, find compatible ones in the market.