My next project is an open baffle speaker, this needs a perfectly round and smooth hole with the normal rabett to let the drive unit be flush with the baffle.

I'll be using MDF, I have a router and jig saw. What's the best approach, is it likely that if I'm very slow and careful I can get a perfect hole with the jigsaw? Should a router be ok to cut the rabett on a circular hole?

I've no idea what is normal practise for doing this.

Thanks for advice.