I think the calculator is somewhat based on the dispersion angle of all of their InCeiling speakers. Due to the angled baffle, they cover an angle from directly below to 60 degrees. You need to make sure that your sitting area (and ears) falls within this range. There are charts on their website that explain this.
If you don't have very high ceilings, you must be careful not the mount them too far forward.
InCeiling speakers have their drivers on a 45 degree angled baffle, which should be generally aimed at the listening area. The useable vertical dispersion angle is approximately 60 degrees. That is, they can be used from directly underneath, to 30 degrees down from the ceiling surface. The rule of thumb is if you can see the tweeter, you are within desirable parameters. To be more precise, use the InCeiling Speaker Distance Calculator in the Dealer Download section of our website.
Last edited by Scott MS; Today at 01:34 PM.