Originally Posted by Bud B
I disagree completely!
The Surrounds like the Center Channel speaker will be bringing out completely different Sounds / Audio than your Front Left and Right speakers ever will.
That is why any professional room that is setup rarely has the Surrounds speakers exactly the same as the Front Left and Right speakers.
I am also not an Audio Geek but it would just make sense.
Of course you know what they say about opinion's, everyone has one...
Disagree completely is a little strong. Let me clarify. I said "ideally", and when I said crossover, drivers, and design; I'd focus on same family of speakers, perhaps related mid and bass drivers but an emphasis on the high range drivers being as close to identical as possible. From what I understand and have heard (in my experience - at least), having similar tweeters is noticeable. Therefore, my recommendation is not to go out and get 5 identical speakers. I guess that would be great, but for most, highly impractical. I'd source the same family of speakers focusing on matching tweeters and similar remaining drivers.
That is, in fact, what I have done. The 803S's share the same tweeters as my center. The rears and wides are both Nautilus 805s and the flattened version of them, the SCM1s. My highly compromised surrounds are Aluminum Tweeters and Kevlar Drivers from the same vintage as my original N805s and my heights (the heights are of a much newer era though - they even have the purple drivers (I wonder if Kevlar color makes any sonic difference - kidding) are also the same Nautilus series tweeters. Now the fronts have the FST driver as well as separate Bass Drivers. All other speakers have single crossover to a Mid and Bass Kevlar Driver. There are some significant differences between the 2 driver speakers and the bigger 803S's. I can hear the difference in a major way while listening to stereo music - comparing between the N805s and 803S's. The bigger speaker just sounds fuller, with more Bass capability and I prefer the 803S's. But, for movies these differences are not nearly as discernible. Not every speaker has the same model of tweeter. I bought these over a series of years, both new and used. I guess it's a bit like Johnny Cash working at the Caddy factory, I have a 73/74/75/76+++ Caddilac. All B&W, just not the same year.
To restate then. Ideally they should all match, even if far more material goes to the fronts. Given realistic size,location and budget restraints, I'd stick within a family and match up the higher range as close as possible. my center is not as capable as the two 803S's. It is a compromise as I do not have or want a perforated screen and therefore I have a low boy HTM3S. We all have to make compromises. This answer all started with the question - what on wall or in wall to match up with N804s? I still stick with my recommendations. Others can have a different set of ideas.