Just wandering if they really kept your speakers dry. I was refering to the ones at
crutchfield.com
Doesn't matter where, they're all pretty much the same thing.
Anyways....a sealed foam cylinder that completely encompasses the speaker. Not really much that can go wrong there in terms of the product not performing as described.
So they can cause your speakers to loose midbass?
In theory, they possibly could.
If they did all you would have to do is cut the bottoms out?
Yes, as that would allow the speakers to "breathe freely" again.
If the baffles were sealed tight, then they could essentially act as a very small enclosure. Considering most car audio speakers are specifically designed to work in an infinite baffle alignment (i.e. no enclosure), this is not desireable. Thus simply cutting the bottom out would bring them back to being infinite baffle and keep the baffle from acting as an enclosure.
Would they still help keep your spekers dry if you cut the bottoms out?
Unless you intentionally keep a pond in your door where water would be splashing around uncontrollably....yes.
The main "problem" with speakers getting wet comes water dripping on them (from the window seals not sealing perfectly tight or somthing like rolling your window down some during a rain, etc). Thanks the this wonderful gift we call gravity, water can't drip upward, only downward. Thus cutting the bottom out is going to have no effect on keeping the speaker dry.
And your doors have holes in the bottom of them to prevent water from pooling in the bottom.