These baffles are great! They protect my speakers from water, from my leaky truck. They sound great and add some nice bass!

They did make the bass tighter, more clear, thus it distorting easier at lower volume. Does as advertised well thus the 5 star rating. Found I can turn it up a bit more without having them & when it does begin to distort, it's more "spread out", less noticable. Seems to be easier on the speaker without, just in case. Crutchfield refunded me without needing to return due to shipping costs. Great customer service!

Baffles are probably the smartest thing for your stereo! With the space behind the speaker, (open), it doesnt have anything for the bass to reverb off of. If you put these baffles behind your speakers, it protects them and adds greater handling of bass and noise.

very easy to work with and help to make speakers sound better.

Good quality product. If you're using your 6x9s as your main source of low end bass then i would stay away from these. They kill pretty much everything below 70-75hz. However if you're looking for something to tighten up your 80-150hz range then these are the way to go.

I figured that since I have subs the baffle might act like a barrier and reduce the
ill affect the sound waves from the subs might have on the bass response of
my 6x9s. Well, I figured since they were new it just might be an issues of break
in. After a couple weeks I could actually notice a slight difference, but still the
bass was practically nonexistent. Nearly everyone that bought the Alpine SPR-
69C speakers seemed pleased, so I doubt it's the speaker. I have yet to
remove the baffle to see if it actually is the problem, so I can't truly blame the
baffles as of now. Nonetheless, it's sad that my Alpine SPR-12C speakers up
front have just as much bass as my amped 6x9s.

I'm not sure I like these yet. I purchased these for my 6x9 Aplines that are mounted in a partition wall of my Ford Econoline van. The backs of the speakers were open to the cargo area and I felt I needed some speaker protection as well as something to help with the accoustics. I did a complete system install and I have not tried it without them. I think these baffles may be killing some of my sound.

I put these under my 2 new 6x9 alpines to keep them dry. at first i didnt like them
because they distorted the base way to much. then i decided to put dynamat on the
inside and out to keep them solid and stop the wierd distortion they added.The
speakers hit crazy hard for most bass with this but couldnt hit the lows without ratttling
my rear deck. so i then cut and made a makeshift port for both of them. They act like
boxes for subs now and the volume difference is insane.The lows flow smoothly and the
mid bass hits make my chest thump. all in all its a good product after a little bit of fine
tuning

The 5 inch ones were too deep and got squished amongst the trunk lid hard
ware. The end result for me on this install was marginal. I did previously put
some in my father in law's car and I heard a cleaner better sound for sure. All
though he doesn't like much bass and really likes clean highs.

Here's my reasoning for rating this slim version so low: The smaller size (with less space between the back of the speaker and back of the baffle) can have some unwanted effects depending on the speaker enclosed and its size. In my case, the cone movement of the speaker would cause the baffle to suck in and rattle against the back of the speaker. I ended up having to cut out the back of the baffle to fix this problem. On a positive note, the general theory behind these seems sound enough. They are of decent quality and would provide adequate protection for speakers (especially those mounted in doors). The seal around the speaker is also pretty good considering the vacuum that was created in my case (resulting in the unfortunate rattle). I've seen first hand what can happen to an unprotected speaker in a car door. For my sound setup in a previous car, one of the door speakers eventually sounded distorted so I pulled off the door panel to take a look. Sure enough, corrosion had built up where the wire connected to the speaker. After a thorough cleaning, the speaker sounded fine again. In conclusion, I would definitely recommend the regular size baffle and not this slim version to avoid the issues I've had, especially for deeper speakers.