I am wanting to upgrade my db650s with sr6500s in factory door locations in a 98 Cherokee. I noticed Crutchfield is now selling the sr6500s, but calls them a 6 3/4 " speaker (and says they don't fit my car). Sounddomain suggests they won't fit as well. The db650s I have installed were described by Crutchfield as a "don't fit" for the Cherokee as well.
Based on Polk dimensions, the srs should fit, possibly with enlarging the cutout diameter in the inner door by 5/8" or so. The srs are 9/16" deeper than the db650 when flush mounted as well (and I remember having some room to play with, depth-wise).
On advice from others in the forum, I plan to initially mount the srs coaxially. The main problem I see is that the db650s I currently have installed in this manner cause the factory plastic door panel to deflect a bit- the tweeter on the speaker presses outwards against the plastic grill in the door panel. This may be why these speakers are described as not fitting, though the problem is slight.
I sent an email to Polk customer service a few weeks back, to find out the dimensions of the sr6500s when set up as a coaxial, more specifically- the distance between mounting flange on back of woofer to edge of tweeter, but have not heard back from anyone. I do not have a sr6500 to measure against my existing speaker to determine fit problems before buying.
If anyone has installed the srs in a 97-01 Cherokee, or even can give the distance tweeter protrudes from the woofer when set up as a coax, your input would be appreciated.