Wilson Audio makes the jack for the Maxx speaker which I have used (borrowed from the previous owner, he will not sell me the jack) with great success. It is a work of art, machined from billet aluminum and very slim to fit under the speakers. I think that you can buy one from Wilson for nearly $1000, which is consistent with his overall pricing policies! I'm sending pictures to a friend who has a home metal shop to see if he can reproduce a similar jack for me.
