Are My Tweeters "On Axis" or "Off Axis"?

SSTJ

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Let's say that I install some component speakers in the front. 5.25" midrange cones in the dash panels (where the 4x6s were) and tweeters on the dash. Let's say that the tweeters are located on the left and right corners of my dash, or perhaps somewhere low on the A-pillars. Each one points toward the back of the cab, but slightly inward, toward either the driver's or passenger's headrest.

My tweeter crossovers have the option of being set "on-axis" or "off-axis". Am I right that the arrangement described above would considered "on-axis"? I've read some conflicting comments online.
 
Ok, that’s easy enough. But why would anyone point a tweeter in any other direction?
Because many people put them in the factory locations in the sail panel or door panel where they're firing across the vehicle and are not pointed directly toward the listener.
 
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