I want to make an electret microphone setup for my accordion. 4 mics on the treble side and 2 on the bass side.

Would I need a preamp for each mic and then mix the outputs using an opamp?

Or would it be possible to make it not using preamps or an active mixer? Would the signal be loud enough for a sound card to then amplify for example?

It would be nice if the mics could be powered by 48v phantom power.

Could this circuit work? Using preamplifiers and an opamp mixer
[![enter image description here](https://i.stack.imgur.com/bKkKu.png)](https://i.stack.imgur.com/bKkKu.png)