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I am using Polk TL3s on ceiling for Atmos with my LSiM setup (705s, 703, 702 f/x). They have a ring radiator like the LSiM, but are very hard to find today.

Here is an article that does the math on how much power a Polk LSiM speaker with similar sensitivity needs to play loud: https://hometheaterhifi.com/editorial/oped/how-much-amplifier-power-does-your-…

Three towers obviously the ideal, but my tower/bookshelf hybrid approach with all the tweeters and midranges at the same level gets most of the way there, except as you say, for some bass dynamic ran…

I ran with LSiM up front and non-Polk speakers for surrounds for a year or so and then out of "purity of essence" or OCD, I bought the 702 F/X. I was really surprised how much better they b…

I good or sound bit of advice is to start with the best speakers you can afford and upgrade the rest of your system in the future as your budget allows. Corailnes, it should like you are proceeding d…