Not sure yet what for the name, but this thread: OB Wans build II, OB Vans, Sons of OB Wan ???, with the 5in beyma coaxial / 10 and 12in 1.5 way woofer build (vs the dual 12s for the OB Wans).
Fully covered ~ Vandersteen style Model 1C - 3A, with front removable grills. I draw to 1/16th inch, if I get to ~1/8th with the build it’s a home run (for me anyway), but you gotta start somewhere. Going to try a wrap around grill to the front edges of the baffle, with a combo dual sided tape / screen spline to keep front somewhat clean (no staples on the baffle, the top and bottom under the caps a different story…).
But at the (one of many, many…) visits to my local ACE, I quickly found out the wood dowels don’t even start out straight. Went over to the metal tube section, and although the steel ones were perfect (straight and unbendable) I had no way in my shop to cut them to size. Surprisingly the 5 ft copper tubes were straight (at least per the roll test on their cement floor). I was a bit concerned they could be somewhat easily bent, although they are much more solid than the copper roll tubbing. I then came up with the idea of filling the tubes with ½ in wood dowels applying as much clear caulking as I could get into them. Looks like this should not only provide a bit more support and a little dampening, but also gives me wood plugs at both ends to screw the top and bottom speaker caps in (I will be cutting to proper size in a few days when all cured). I’m actually fortunate the dowels weren’t straight, as I think this is a much better result.
The baffle is a composite of 12mm (~1/2in) and 18mm (~3/4in) in baltic birch for the woofer section (the woofers will be set down flush through the top 12mm), and the front 12mm baffle section for the coaxial (routed down ~ ¼ to get flush). Getting better with hand routing for the coaxial odd shape (routed the circle section and then go back and hand route the corner sections).
The one pic with both speaker baffles: the one front-side up shows the groves along the sides for the wrap from behind grill, using both tape along the front edge and screen spline to finish off the grill material.
Also, the back side pipe corners seem to be working out a bit easier than I had thought (fingers crossed).
Stepped / flared out the back side for the coaxial (as with previous OB build), and slightly routed down the outside front edges of the baffle ~ thickness combo of the double-sided tape and grill cloth (relative to front baffle face). I see you guys often routing out for the speaker drivers after the box has been completed- makes me nervous.
Very rough at this point, but back copper pole corners set and top solid wood (yet to be cut and stained) cap just sitting atop, for viewing. And, although the front baffle will have dual black grills (one upper for coax and second lower for 1.5 way woofers), when removed just needed some JBL-ish color.
I figured the copper tubes could, maybe, use a bit of extra bracing (and yes, a zealous use of wood glue in all of my (less than CAD fitting) projects…)
Top caps and base stained; not completely finished (need to apply flat poly when oil stain sets after a few more days), but wanting to keep a rustic finish (and looking like ~ 4 ¼ degrees +/-, back tilt for the speaker).
A little better perspective of the back tilt @ 4.25 degrees (and should be fairly easily to adjusted ½ +/- degrees when using a thin felt piece under the front of the feet/support vs up to 1/8th inch felt at the back). So ultimately looking at 4 to 4.5% to target coaxial / tw center to listening ear height. Also, currently at the more boring grill build stage, but thanks to needing to order more grill cloth for the wrap around, slows me down and keeps me from poly’ing the stained caps and base supports to early.
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