Edgar_in_Indy Posted January 17, 2017 Share Posted January 17, 2017 I have a pair of Chase Home Theater (CHT) VS 18.1 subwoofers (monstrous 18" vented speakers) for my home theater that I'm wanting to upgrade the drivers on. I'd like to swap out the stock (and rather pedestrian) Eminence drivers for Dayton "Ultimax" UM18-22 drivers. The only problem is that the UM18's are about 1/4 inch larger than the stock drivers, so I'll need to enlarge the speaker opening a little bit. I'm not a woodworker myself, so even if I obtained the tools I would probably still mess it up. I don't want to butcher my cabinets, so I was hoping somebody might be able to recommend a competent woodworker to hire in the Indianapolis area who they would trust to cut into their own speakers. Thanks! Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted January 17, 2017 Share Posted January 17, 2017 The room looks great. Get those UM 18's in the boxes and you will be boomtastic! Edgar, takl to RoboKlipsch on our forum. He may be able to give you some more detail on the size router bit needed and a few other pointers. Quote Link to comment Share on other sites More sharing options...
jason str Posted January 17, 2017 Share Posted January 17, 2017 If you have a router pick up a rabbeting bit to remove 1/8" of material around the driver opening. Something like this will work. 2 Quote Link to comment Share on other sites More sharing options...
wvu80 Posted January 17, 2017 Share Posted January 17, 2017 I would suggest you head to your local Lowes or Home Depot. Talk to the guys who sell the MDF etc materials and see if they know someone who will route out your holes. +++ Jason, your suggestion to buy a rabetting bit seems elementary to you. If it were a guy with me with no knowledge and no woodworking skills, I would worry to death I would screw up my speaker cab. Quote Link to comment Share on other sites More sharing options...
jason str Posted January 17, 2017 Share Posted January 17, 2017 Very simple process, all you need to do is choose the right bearing and adjust the depth of the cut. Quote Link to comment Share on other sites More sharing options...
muel Posted January 17, 2017 Share Posted January 17, 2017 And practice on scrap material! 2 Quote Link to comment Share on other sites More sharing options...
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