Originally Posted by rubs
I have a following configuration:
Currently I am using Athena cs.5 rears, Is it worth to buy ES250 (these are expensive) or I can buy beta10 or beta20
My two cents, for what it’s worth, is that it all depends. Helpful, right? Since I wasn't able to do a side by side comparison of the ES250s versus the Beta 10s or 20s, I can only speak to what I’ve gleaned from reading various AVS forums and my experience with the ES250s. The Beta 10 and 20 is rear ported and should have some room behind it. The 10 seems to have the same drivers as the ES250, except each ES250 has two sets and allows you to switch between bipole, dipole, monopole or to drive each pair of speakers separately (a nice feature for a single back surround). The 20s are larger than the 10s and weigh more and require more space behind their rear port. The ES250s and 20s can probably be driven harder than the 10s. By how much, I don’t really know.
The ES250 and Beta 10’s response is: 60Hz – 20kHz (±3dB) with 87db sensitivity. The Beta 20’s is: 58Hz – 20kHz (±3dB) with 90db sensitivity. Since I’m using Audyssey EQ in my system, I’ve set all of my speakers to ‘small’ with an 80Hz crossover controlled by the receiver. With that setting, the ES250s and 10s in theory are all that I should need for the surrounds in terms of low frequency roll off, especially since I don’t drive my system to the point to where my ears bleed.
The other main consideration is your room, and whether you are doing a 5.1, 7.1 or 9.1 configuration. If you have room for the bookshelf speakers and can angle them towards your listening area, I’m sure they will work fantastically. I needed to mount mine directly on the wall. Thus, I chose the ES250s. And, someday when I build my ultimate HT, it will be 9.1 system with an additional set of Beta 20s in the back corners of the room. Why Beta 20s? Because I’m using them for the fronts, I want the speakers to match, and they aren’t that much more than the Beta 10s.
I sincerely hope that someone who has experience with the Beta 10 and 20s as surround speakers will add their comments, since I don’t know what I’m talking about.
PS. I don't have a wife, so the 'wife factor' didn't even play into my decision.