Hey everyone, if you frequent this form you may have noticed the advice threads I've posted getting ready for my UXL-18 build.
The speaker will be here in a few weeks and I since you guys have way more knowledge on this stuff, I wanted to show you all my plans and see if anything seemed wrong.Dimensions
The sub will be 25w x 25h x 30d and made with 3/4" mdf with the speaker flush mounted (well, recessed 3/4").Ports
It will use four 3" diameter x 44" long ports, made from 3" pvc, with precision port internal and external flare. I'm not really a fan of the external precision port flares but I tried making my own and it didn't go so well. I could always swap them out in the future.
The internal volume with all the bracing is 7.55 cubic feet. (7.613 cubic feet with just the main vertical ones).Tune
With the 7.55 cubic feet volume and port specs winisd shows I should be able to go with a 16hz tuneDesign
This is the basic layout for the sub:
*The only thing I've decided to change from this is making the front and back piece 25x25 (instead of 23.5x25) so that the screws for the ports will be the front piece. I'm also going to make the interior bracing 24x24 and slot them into 1/4 dados.
This was my idea for some horizontal bracing. This is the only part of the design I haven't completely hammered out: The tricky part is keeping the 3" clearance around the interior ports.Power:
I'm planning on using an EP4000 amp. I would love to get a QSC RMX1450 but it's a good 200 bucks more expensive and the only real bad thing I've heard about the ep4000 is it's a copy of the RMX1450 and the fan is loud (which seems pretty easy to fix).Veneer
I'm going to veneer it with some 10 mil white ash. I was planning on doing 3/4" rounded edges on the top and bottom sides but veneering would be so much easier if I didn't.Finish
Either way, I'm going to be painting it black lacquer (trying to get the typical black ash finish). I'm going to build a small paint booth but I wasn't planning on using any fans and just going with a suit and respirator but should I look into exhausts? I didn't think it would be necessary for something this small
Applcation will be via the heat glue method, coating the box and veneer and using a clothing iron to heat the glue and trimming with a flush trim router.
Starting with a light 240 grit sanding before painting
Everything will be diluted with 10-15% thinner
two light coats of black #40 sheen lacquer primer sprayed with a HVLP gun.
two light coats of #40 sheen, semi-gloss black
single coat of #40 sheen clear (maybe 2 depending on how much grain I want to see)Feet
Nothing fancy, I'm gonna go with 4 of the dayton audio 1-3/8 hard rubber feet. Would 4 be enough or should I go with more?
**I'm going to be using ez-lock nuts + bolts for everything so that the speaker, front port flares, terminal and feet are removable
I'm going to build a two dimensional rotating jig so i can paint all 6 sides at once. It will basically look like a U shape with horizontal arms that mount to the box so it can spin along one axis. I'm then going to put it on a dolly so I can spin it along the other axis
Anyone see any holes in the plan?