Wayne Parham Messages: 18748 Registered: January 2001
Illuminati (33rd Degree)
Point the center straight forward. The sound everywhere within the forward lobe is the same, so it isn't more shrill on-axis or more laid back off-axis, provided you are within the 90°x40° forward lobe. That's one of the benefits of constant directivity.
I realize there are some other waveguide speakers that do not sound good on-axis, and the recommendation for those is that they not be setup to listen on-axis. That is probably why you asked. But none of the π Speakers line are that way. Ours are truly uniform, and the spectral balance is the same everywhere within the pattern.
There is a difference in the center channel content though, and it is sometimes mixed hot with dialog. That's the point of the center channel, so it makes sense. But because of that, sometimes people prefer to adjust the volume of the center channel separate from the L/R mains.