Quote Originally Posted by kinomat View Post
I think cutting an Altec speaker frame is an unthinkable act, please don't. Many moons ago when confronted with the same situation,vertical slots were cut on each side of the enclosure from the speaker mounting board to the back 1.5" wide and 9" height. that way I was successful in getting the new 16" frames to fit, from memory the mounting ctrs were the same & inside frame to frame was no problem. you then have to make appropriate caps to cover those openings. I suggest making two 16" cardboard templates with mounting holes and check out, it was about 25 yrs ago for me.