Originally Posted by HuskerOmaha
Due to the weight and placement options, I think I've finally settled on single cabs instead of dual opposed. I think I'm going to build some cabs instead of messing with widening the Dual MFW cabs.
So...questions for those that have dealt with heavier drivers...
Assuming 4 cabinets for 4 UXL-18s......(cabinets need to also be able to throw a LMS5400 U in them, in case I can't get another pair of UXL-18s)
What grade of Baltic Birch/# of ply/void free?
Double or triple baffle (flush-mounting preferred)? Weight of the driver matter?
Hurricane Nuts inset, or screw in the drivers?
For magnetically attached grills, DIY or find a cab maker to do a few sets?
Preferred size to work with either driver?
(since I'm not a pro, walk me through how inductance numbers from Ricci with the UXL-18 would change the size?)
I'll be putting a Speakon plug on the rear of the unit to hook up to the clone amp or any other pro amp.
Thanks for the suggestions in advance guys.
EDIT: What kind of free downloadable sketchup programs work the best for this once you get a dimension idea, etc?
My LMS is mounted in a 6.1^ft3 sealed box with a 24X24 single layer of 3/4' MDF for the front baffle. The front baffle has little surface wood unsupported by the sides, top and bottom, or bracing inside the box. The front baffle is stable except at extreme SPL levels when you can finger-sense a slight vibration. Might be the entire box moving! My box and driver weigh 145Lb.
I drilled the basket bolt holes out to 1/4" and used hurricane nuts carefully glued to the underside of the front baffle. I say carefully because you don't want any glue getting on the threaded portion of the hurricane nut. I figure (8) 1/4" inch bolts ends up carrying about 9 pounds of an LMS per bolt. An LMS is about 76Lb.
I don't have a grill cover. I prefer that listeners ask why the cone moves so much. It's important though that the driver is far enough out of the way so someone careless doesn't accidentally put the tip of his/her shoe or a vacuum cleaner through the cone.
I did NOT use the rubber gasket that came with the driver, it was too loose and interfered with a good seal after the bolts were tightened. I was able to get a good seal with no gasket.
It's important to have all edges, braces, and pin holes sealed and glued. System wiring should be attached firmly. They WILL work loose over time if not.
I'm not sure what you're asking about Ricci and the inductance.
Run the UXL-18 through WinISD and choose which size box best suits your scenario. Most drivers have a "best case" size that produces your desired response curve and cone X-max etc.
A speakon connector plug is good.
Enjoy, report back.