Originally Posted by Hoosierguy
I have 2 Infinity sm152's for L and R and an Infinity sm center. Can I use 2 more sm centers for my surrounds in a 5.1 setup ? I would end up with (2 )152's and (3) sm centers.
Sometimes there's a division of opinion (dipole/bipole vs direct radiator) along "music vs movies" lines.
Surround mixes of studio albums like those found on many SACD or DVD-A discs often benefit from using 5 direct-radiator speakers, which more closely replicate what was heard in the studio during mixdown. So many for whom surround-music listening is a priority use direct radiating speakers, and are willing to sacrifice the more enveloping diffusion of bipole or dipole surround speakers.
Most surround mixes in movies are designed for that sort of envelopment, which direct radiators tend to work against.
In some situations where diffusion is desired but only direct radiators are available, careful placement and aiming can help. Instead of aiming the speakers directly at the listeners, aim them so that much of the sound reflects from a nearby wall or ceiling (or both) before reaching the listeners. Some people have had success placing the surrounds behind the listeners and aiming them at the ceiling, or at the side walls. In this sort of setup, be sure to add the entire distance the sound travels when setting speaker delay values in the processor setup.
Experimentation can be worthwhile.