Hey, Hyped; welcome!
If you fill out your profile the members will know what equipment you have available to you, a first name maybe also?
In any case, if it were me, I think I'd drill out the smaller diameter with a holesaw first, then use that as a template to rout out the slightly larger rebated diameter (the actual recess that the speaker sits flush in).
I'd be a lot more comfortable using a drill press for the smaller diameter hole, with the bowl firmly clamped to the table.
If a guy had a lathe, that'd be another approach.
Having said all that, what you want to do is pretty sophisticated if you've never used a router. For one thing, a handheld router is normally used on a flat surface; you want to do it on a sphere. Not saying it can't be done but I think I'd be using a small trim router to do the rebate.
If you fill out your profile the members will know what equipment you have available to you, a first name maybe also?
In any case, if it were me, I think I'd drill out the smaller diameter with a holesaw first, then use that as a template to rout out the slightly larger rebated diameter (the actual recess that the speaker sits flush in).
I'd be a lot more comfortable using a drill press for the smaller diameter hole, with the bowl firmly clamped to the table.
If a guy had a lathe, that'd be another approach.
Having said all that, what you want to do is pretty sophisticated if you've never used a router. For one thing, a handheld router is normally used on a flat surface; you want to do it on a sphere. Not saying it can't be done but I think I'd be using a small trim router to do the rebate.