'Those drivers' are the excellent SB Acoustic 8"ers I had in the front doors of my Escape for a couple months. As you shall have the opportunity to see, the installation in the JGC was a bit complicated.
As I mentioned earlier, the complication is the 'tube' molded into the inner, plastic door panel, shaped, of course, for the 6X9" drivers Jeep used. The solution was, first, to mount the 8" drivers on a 3/8"-plywood panel shaped for the inner, finish door panel and then to cut a portion of the 'tube' away to accommodate the backside of the larger driver. My goodbuddy did that tough work while I applied Dynamat Extreme to the other plastic doorpanel. Here are pics of the door without Dynamat; more pics tomorrow if I can stand the still-summer-in-Phoenix heat in the garage in spite of a fairly effective evaporative cooler.
Here's the driver mounted, overall.
Here's the driver, closer.
...and yes indeed, I punched a hole thru the surround.
A view from above and rear.
A view from above. The copper-tubing standoffs help stiffen the plywood panel against the doorpanel.
A view from below and rear.
These drivers are driven with bass only, with a lowpass-filter point of c. 140Hz currently. I think
they're a little less sensitive than their predecessors and I may have to lower the gain of the poweramp channels driving the instrument-panel (MR/treble) speakers a bit.
I'll take more pics after I finish Dynamatting the panels. I bought 2 front-door kits (containing a total of eight 1-by-3-foot sheets), and I plan to install it all
It just occurred to me that some will wonder why the hell I went to the trouble of mounting those 8" drivers instead of buying higher-quality 6X9s. Here are my reasons.
1. The original 6X9s were anything but high-fidelity. What they were is boomy and 'droning'.
2. I had the 8"ers and didn't want to spend maybe $200 on high-quality 6X9 bass drivers.
3. I know that these SB Acoustic woofers sound excellent, and I had no idea what any replacement 6X9 drivers would sound like.
4. I have a goodbuddy who is really good at this kind of stuff, and I have plenty to time to do the less-technical stuff.