MK140 Karaoke Kit Modification Question

Kits Mini Kits Range
1

I have two questions about the MK140 Karaoke Kit

  1. What is the best way to modify the dynamic microphone input to accept a condenser microphone? I need to change this part of the circuit to have a higher gain:

  1. Can this kit handle 12 volts of power, instead of 9 volts? I have a 12v, a 5v, and a 3.3v bus.

Thank you

2

Should work fine with condensor mic. without modification.
12V operation is not a problem.