I doubt Jacob measured, so just take the cone body diameter plus 1/3 the width of the surround. Dude take time to read prior to commenting. Mr. Obvious, that is what I have been estimating. Since no one but Jacob knows I doubt it would be a problem to measure for a paying customer. I have little patience for disrespectful people. At the present time I have several enclosures in the design and building phase and I don't want to waste either my time or Jacobs. I read what you said perfectly fine, I think you forgot your manners for a minute as well.I told you to re-estimate because it's Sunday and Jacob won't be able to reply till the morning, an as you said, "At the present time I have several enclosures in the design and building phase and I don't want to waste either my time or Jacobs." Don't you think that taking Jacob away from his already busy schedule to measure something you can estimate very accurately yourself cause you and him to waste your time? Forgive me if I offend you, but I think you should be taking your own advice.