I put these in my front doors when I installed new speakers. Don't know how effective they are, but I think that the little extra protection is peace of mind for me. Super easy to install. I had ZERO problems with this product.
from Havelock nc
Reduced the rattle in my doors from the speakers
Low cost. I used in my Silverado due to moisture getting on back side of speakers. Easy to install. Can't confirm if it helps sound any more, but I used for protection.
from Bakersfield, CA
Not sure you really need these. Factory speakers were already well protected and therefore so would be my new speakers. No guidance for best way to install these. Screws supplied with the new speakers were too short to mount the speaker to the door And go though the 1/8"+ thickness of the baffle foam. I did use them on the front door, which uses a snap-in clamp for mounting the speaker and left them off the rear doors.
Cya speaker baffles
Used these on my install on my Yukon. Fit great and speakers sound a little better. Plus added protection from the elements.