If you're looking to use passive speakers with a mixer, the answer is yes, you can power passive speakers with a mixer. However, there are a few things you need to take into account before doing so.
First and foremost, your mixer needs to have enough output power to drive the passive speakers. If your mixer doesn't have enough power, the sound quality will suffer and the volume will be low.
Secondly, you'll need to make sure that your mixer has the correct type of output for powering passive speakers. Most mixers will have either balanced or unbalanced outputs. If your mixer has balanced outputs, you'll need to use speaker cables that are also balanced. If your mixer has unbalanced outputs, you can use either unbalanced or balanced speaker cables.
Finally, it's important to keep in mind that not all passive speakers are created equal. Some passive speakers are more efficient than others and require less power from the mixer to reach their full potential volume. So, if you're looking for maximum volume out of your setup, it's important to choose Passive Speakers that are known for being powerful and efficient.