[ulao]

So I have seen them in searching but cant find where to get them?

 

[ulao]

I guess this will work?
Harley Davidson 5 25" to 6 5" Speaker Adapters Injected ABS Made in The USA | eBay

 

[gooberschnot]

I have Polk DXi650's 6.5" in the back without any rings. Rings or not, you won't get any bass from the rears at all. They are best for mids and highs with a sub.

 

[ulao]

Your speak must have a tighter angle then. I ended up with 7 mid bass speakers and found ring on ebay. So happy with the sound.