I think the Ohm's can do a pretty good job of the phantom center, but as Map and other's have commented, speaker positioning is very much the key, and typically is still somewhat of a compromise.
With my setup using a 55" screen sitting on a stand that is just the width of the screen(kind of a lowboy stand), my walsh 3/3000's are about 9 feet apart and my listening position(about 6.5-7' from plane of speakers) is pretty much centered to lock the dialog/center in. But things still get a bit off once you move out of a small window. While the Ohm's manage a great soundstage for 2-channel music, I do think multi-channel is a different thing and can be tough to do with only 2 speakers.
The other thing is that each Ohm speaker can needs to basically "see" the other one in order for things to work well to begin with, so if any one of the speakers is blocked from the other one by the screen, cabinets etc., this will tend to throw the balance of things off, and you will not obviously get the staging right. So, clear paths between them is the way to go.
As a side note, I would recommend the Ohm Micro Walsh omni version for surround duties, very good in this mode. I even find them to be quite amazing for simple 2-channel L/R listening.
Enjoy your Ohm's guys! Tim
With my setup using a 55" screen sitting on a stand that is just the width of the screen(kind of a lowboy stand), my walsh 3/3000's are about 9 feet apart and my listening position(about 6.5-7' from plane of speakers) is pretty much centered to lock the dialog/center in. But things still get a bit off once you move out of a small window. While the Ohm's manage a great soundstage for 2-channel music, I do think multi-channel is a different thing and can be tough to do with only 2 speakers.
The other thing is that each Ohm speaker can needs to basically "see" the other one in order for things to work well to begin with, so if any one of the speakers is blocked from the other one by the screen, cabinets etc., this will tend to throw the balance of things off, and you will not obviously get the staging right. So, clear paths between them is the way to go.
As a side note, I would recommend the Ohm Micro Walsh omni version for surround duties, very good in this mode. I even find them to be quite amazing for simple 2-channel L/R listening.
Enjoy your Ohm's guys! Tim