the mounting locations are mirror-images of one another. Therefore, you need to cut only one template for both sides. However, due to the angles at which you'll have to drill for the mounting screws (to mount the adapter to the door panels), you'll need to drill different holes. Same location on the adapter, just at mirror image angles. I'm cutting my adapters this weekend (already made the template out of cardboard), and it looks like I'm going to use 1/4" for the adapter, and another 1/4" spacer to keep the speaker surround from bumping into the closer-in screws used to attach the adapter to the door panel. If I remember, I'll take some pics before installing them, but I'll definitely post whether it works. BTW, I'm using Boston Pro 6.4s, which have a relatively skinny magnet assembly, which appears critical in this application.

I can't wait to see this! what is your gut feel? are they going to fit into the door with little/no change to the outside appearance? Just by looking at it It looks like there is NO WAY a 6-1/2" speake would EVER fit in that location. You're gonna be my hero if you get it to fit. I'd love to see pics of the spacer, and the inside of the door! ..... I can't get the damn panel off yet.

Rian

But the Bostons are touted as being an easier install for that reason. Plus, with a mounting depth of only 1mm more than the 5 1/4" Quarts, I figured they would work. We'll soon find out...

I see what you are saying OW, and I think I have a pretty good idea what your adapter is going to look like (if I don't do one first to test fit!)

The only thing I'm worried about IS the depth. With the window down it looks like the magnet of the stock 4" is pretty close! of course you can't actually SEE the distance because the panel itself blocks the view access. The spacer (adapter/baffle boardetc.) will have to be pretty thin. I'm actually thinking of milling one out of 1/4" aluminum at work just something for a test fit would be great!

RMR

a lot for the work!!!

So, it's more than 1/8" and less than 1/4". Probably more like 3/16" thick. So, since there will be two layers (ideally), the total adapter depth will be 6/16". Worst case scenario is using only the adapter ring and not the spacer, and hoping the head of a mounting screw doesn't rip into the surround over time. An extremely thin adapter ring (made from aluminum or tin) would help a great deal, though, if there's a problem. Maybe I'll cut one from that as well this weekend...

I think my Bostons will fit based on my calculations from the Quarts & their adapters. Their adapters will have some thickness, and their 5 1/4" speakers are about as deep as my Bostons. So, there's a lot of guesswork here, but we'll see soon enough.

Well, after a little time and effort, I've found that this just ISN'T going to work. (at least not with my Boston 6-1/4" drivers) It actually wasn't the depth that killed ME, it was the width! I couldn't get the speaker mounted so that the door panel hook fit in its little hole near the hinge. When I tried to move it over, it hit a vertical component! I tried this about 4 different ways, and it just WASN'T happening for me :(. I guess I'm back to buying 5 1/4"s or kick panels

Rian

I cut my adapters this weekend, but haven't tried the install yet. I'll update my progress this week.

You'd have to trim some door panel material with a dremel, but it doesn't look like much, and it opens up about 2 inches of lateral space to avoid that vertical member part of the door itself. One other option is trimming the door metal, but that's not as attractive, or as easy as dremeling the door panel. I'm talking about the 1/2 inch wide area of plastic just before you get to the door pocket. If you get rid of some of that, you can move the speaker more rearward. What do you think?