One of the things MaxxAudioPro does is audio jack detection. Do you have another mic that you can try.  Some of the mics designed for cell phones don't work or work well in a PC. There are also options for devices such as "listen to this device" and individual volume levels.      
Hi, I bought a lapel mic for myself and it worked fine and I could hear myself talking into the mic through my Logitech surround sound speakers. I bought the same mic as a spare and tried it out and I can't hear myself talking but I can see the level moving when I speak into the mic but I can't hear myself speaking through my speakers. My speakers are enabled, default device and working fine when I've watched videos & listened to music even after I've plugged in the spare mic. I find it strange that I can't hear myself speak through the speakers and yet I can see the level moving which suggests my mic is working. The mic is correctly plugged into the mic jack on the front of my PC and the mic is default input device. If I've missed any information please let me know. Thanks in advance!
Lapel microphone not working G5 5000 Series Desktop gaming PC