Rowhard: So bottom line is what depth can I go to behind the speaker and how far in front before hitting the plastic panel? I went to Best Buy looking at a few 3-way 6.5 inch speakers and then chickened out when I didnt know the distances. (all the boxes have the rear depth listed on them so that will be easy once I know..I have my scroll saw so I can cut the larger hole. Just unsure of depths.