Ideally, the spacer should be MORE than 3/4".

Look at the factory speaker frame.

I bet if you look at the rear of the door panel, there is a foam ring that mates up precisely to the front of the OEM speaker frame. This seal allows the entire door panel to essentially be the speaker baffle, and allows much improved midrange (edited to add "i mean midbass") over simply having a gap between the speaker frame and the door panel. The door skin itself is usually leaky and has access holes in it, so it's not as good a baffle for a speaker as the door panel itself.

We've done this in a ton of Acuras and BMWs and such, and from the look of that door speaker, it's the same deal.

Anyone wanna post a pic of the inside of the door panel?

 

Look at the pic of the OEM speaker frame.

It's at least 3/4" thick, if not 1" thick.

 

It's not really used for a spacer, the speaker will fit, its just the hole is more than 6.5" all around so you need something to cover the hole with.

 

Here is a little more reading for your spacer install

 

nice.....

 

The spacers work very well as spacers, but I still don't see that they "mate" up to the back of the door.

Anyone have a pic of the back of the door panel?

 

expresso i would buy that from you in a quickness, i really need something like this, the place that installed my stereo did a ****ty *** job, he just screwed my 6.5 components on and theres spaces and gaps all around for air to come out, there's no spacer at all, sigh...

was wondering if anyone know where i can buy a nice 3/4 spacer for my 6.5 midrange speaker? i dont have the skills or time or equipment to make one, and if someone can make one and sell these, im sure a lot of us would be interested in purchasing a set!

 

$30 for a jigsaw at Home Depot. $5 for a 2x2 sheet of 3/4" birch cabinet plywood. Couple of bucks for spray paint to make it more water resistant.

If you spend a couple more bucks for a 2x2 sheet of 1/4" and 1/8" and some foam weatherstripping tape of various sizes, you can make what I'm talking about specific for your speaker.

I've seen what the interior decorators on Trading Spaces can do... come on: )

 

I see what you're saying.

The spacer should perform two functions: adapting the new speaker to the original (larger) bolt hole pattern in the door, and sealing the outside edge of the new speaker to the inside of the door. The spacer thickness would determine speaker fitment with the inside of the door.

Now I'm curious about the details of the inside of the door too. Does anyone have a picture of the inside of a front door panel?

 

bump

 

as el_duderino mentioned, there is a foam "gasket" ring on the backside of the door panel itself, that mates up against the stock Bose plastic woofer frame

after installing my 3/4" MDF ring, then using the speaker gasket that Polk supplied, then screwing in the woofer, it brought the woofer right up against the foam gasket on the backside of the door panel... i don't have pics but the woofer frame was definitely touching the gasket on the door panel

the 3/4" of MDF, plus the speaker gasket, plus the frame of the woofer itself comes out to be roughly the same as the stock Bose plastic frame

 

Sweet! That will help your midbass a ton.