[guitarman68]

So I guess you use the KM 184 on guitars, yes.
Set the EQ on your amp flat. Placemant of the amp is crucial for anything that follows. If you place the amp behind you, feedback will occur much more than placing it in front of you, on axis with the microphone. That means, the microphone is pointing at you and your guitar, and you can see the amp in direct line to the microphone, behind the mic
Placement of the mic depends on the guitar and the sound you want to go for. In the studio you would start with the body/neck joint position. For live use (I know you do not gig, but your setup is more of a live setup than an recording setup) you would place the mic a bit more towards the sound hole to achieve more gain before feedback. Now the wonderful Felix EQ comes in.
But first you want to fix the correct input level for the mic. The Felix will indicate that when heavy strumming (maximum peak) leads to red light on the mic channel. If so, bring the mic input on the Felix down a little bit.
EQ on the Felix is great and superior to the EQ on your amp. Set the amp EQ flat and leave it there. Set the Felix EQ flat and bring up the amp level to your needs. You will hear a boomy sound you will not like. That's from placing the mic near to the soundhoöe. Leave it there but bring up the HPF (high pass filter) on the Felix by dialing the knob clockwise. Turn it clockwise until the boom disappears but still enough bass left like you would hear from the acoustic sound of your guitar.
I never had the need to work on the mids. But the treble can be a problem and cause some feedback. The KM184 has some hyped trebles, the same with many acoustic amps. So if feedback occurs, bring down the trebles by dialing the treble know on the Felix counterclockwise.
The acoustics of your room is another topic you should pay attention. Easiest thing is playing with moderate volume level. Next step would be change room or placement inside your room or placing a carpet below you and your setup if performing on hardwood or any hard surface.
Hope that helps a bit.
Enjoy your wonderful new setup - you'll love it.
Cheers,
Bob