I ended up returning these since they did not fit in doors with speakers.
from Point Venture TX
Works as advertised
Does the Job and DEM SUM!
from powder springs, GA
These do what they say they will. They improved the sound in my speakers enough for me to buy another pair, but i went with the boom mat brand. The boom mats look better and I'm probably going to replace these with the boom mats. I also installed the dynamat lite stuff, on all my doors which also were worth the investment. If you are an audiophile on a budget, and an amplifier is out of the question, then add some baffles at least. You can also add dynamat just around the speakers and holes in the door to help keep sound in and unwanted noise out Just make sure you have enough room so your windows don't run against the back of the baffle, and you have to add a hole for the wire and so the speakers can move easier (the baffles will create a suction if an hole isn't added.)
Work for me
from Nashville, TN
I ordered these mainly to serve as protection from potential water damage, but I also like the benefit of having a foam buffer between the outer flange of my speaker and the metal door, which has all but eliminated the rattling when the music is played.
Honestly, I cannot comment on how the baffles affect the sound, as the backs were slightly opened to make installation easier. But, for me, the sound deadening and peace of mind of water staying off my speakers make this a very inexpensive investment.
from Tracy CA
Bought these when I purchased replacement speakers for the rear deck of my car. They were easy to install. Sound seems to be improved, but that is also in due in part to the new speakers.