In general, smaller diameter diaphragm = wider dispersion.
Note that the tweeter's faceplate (and the surrounding front baffle of the speaker) will act as a 180 degree horn, limiting the radiation pattern at the lower end of the tweeter's passband. So...
Small faceplate tweeter on a stalk-like mount = wider dispersion at lower end of tweeter passband.
Also, it's kosher to tip the tweeter towards the listening area a wee bit - in fact, this may be preferable to omnidirectional in the horizontal plane (note that a true omni is pretty rare - what we call an "omni" is typically fairly directional in the vertical plane).
Best of luck with your project. I admire your passion, Pedrillo.
Duke
Note that the tweeter's faceplate (and the surrounding front baffle of the speaker) will act as a 180 degree horn, limiting the radiation pattern at the lower end of the tweeter's passband. So...
Small faceplate tweeter on a stalk-like mount = wider dispersion at lower end of tweeter passband.
Also, it's kosher to tip the tweeter towards the listening area a wee bit - in fact, this may be preferable to omnidirectional in the horizontal plane (note that a true omni is pretty rare - what we call an "omni" is typically fairly directional in the vertical plane).
Best of luck with your project. I admire your passion, Pedrillo.
Duke