I'm not a professional, but over the years I've installed dozens of in-ceiling speakers at home, with friends and family - mainly bass and midrange speakers I brought these to extend the background sound in another room in my house that Polk Rcis are mostly installed in. The shelves sound great but the price has gone up lately so I have them tried it out for a seldom used space. These speakers have a very strong and stiff frame. Much more so than other speakers in their current price range under 50 and better than the in-ceiling speakers that I've spent 2 or 3 times on. The latches almost wouldn't let up bend, didn't interfere with installation and held up my thick plaster ceiling with ease The disadvantage of the structure was that the grids were very difficult to install. Unfortunately I didn't find the sound quality very good. I don't know how anyone can justify their list price with top options like this, but under $100 for a pair, they're fine. Cheap Pyles and acoustic speakers sound fuller and less harsh than those budget Klipschs, but the surrounds are so flimsy. Bass is never great with ceiling speakers, but it's almost non-existent with them. The tweeter sounds harsh and the mids are swollen, muddying the vocals. They seem more suited to low level background instruments like Muzak. I'll try some rear boxes and see if that improves the low frequency response. As mentioned, they don't have a real crossover, just a capacitor on the tweeter, like woofers in cars. For me, given the current price, this is not critical. I have used ceiling speakers with similar characteristics for background music with good results.
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