Monoprice ABS Back Enclosure Pair For PID 4104 8in Ceiling Speaker, Includes 4 Speaker Mounting Screws

Some of the other reviews complain that instructions are missing. It's very straightforward. They match the shape of speaker you're putting them on. I filled a quarter of the enclosure with poly-fil, placed the provided square poly-fil on that, and tightened the screws. The only con I see is that you should test your speaker connection before installing in the ceiling. I made that mistake once and tested the all speakers while I still had them on the ground.

We had to modify the speakers to fit into these enclosures. We put in some Rockville HC85 8" speakers. After cutting away some of the standoffs on the speakers they fit well. Overall happy with the product. It is not at all ported so test your speakers in and out of the enclosures to check how they sound. You could port these enclosures if you had to. We added some L brackets and ended up wall mounting these high up in classrooms. It actually looks pretty good.

These are a must for ceiling speakers when attic insulation occupies the your installing speakers into. They fit the PID 4104 speakers perfect and prevented any insulation from entering the speakers.

They do not work well at all. I ended up taking them off and building a box for the speakers. The made the speaker sound worse than they did with no enclosure. I would pass on these.

Enclosure works as expected. I put these in 7 rooms. I am very happy with the way they installed and how they "sound". I did not have any issues.

These enclosures are a must! made the world of difference to the sound quality.