I have 4 Microflex MX200 series and I want to know if there is a device that I can power them with besides a powered mixing board?
We will assume your question is: Is there a device that will provide phantom power to the MX200 besides a powered mixing board?
Yes. There are several companies that offer phantom power supplies. You can also build your own supply. You will find instructions at the following links:
How do I build a phantom power supply?
Battery Powered Phantom Power Supply with Balanced Output