front door speakers

I found a set of JBL 6x8 component speakers (typically used in mustangs) and I was curious if they were going to interfere with anything if i go to make the opening any bigger. just for the fact that I want some more mid-bass than what the 5 1/4" offer.

Just be careful that the magnet will not come in contact w/ the window.

Im not a stereo guy so thats all I can think of.