Did some work on the subwoofer enclosure this weekend but not much to write home about. I've decided to let my ears be the judge. I'm going to seal one chamber and port the other, fire 'em up see which I prefer. Then once I decide if sealed or ported sounds better in this car, I will vinyl it up and be done with it. I think with this kind of install with so many variables, it's best to let my ear be the judge. Conventional wisdom is that ported will pound better but ya never know....
Awesome build! regarding the port, i always use the 15-20 sq in port per cu ft.
Slow going working on the front edges (sides) of the subwoofer enclosure where it buts up against the two sidewall amp rack panels. I want the enclosure to follow the curvature of those panels so it has a nice custom fit look from the front. I'm trying some modeling clay tonight to see if I can get it to harden in the shape of that curvature so I can then trace it onto a piece of MDF. At this point that gap doesn't need to be perfect but I do want to mirror that curvature as best as possible and then can work out the details later with some body filler. We'll see how it goes. I **** with clay...
For anyone wondering, the clay was a bust, lol. But at least it did give me a general idea for the shape. What I ended up doing was drawing the shape onto MDF as close as I could. I don't want the enclosure to be too fitting to the sides at this stage. Once the fiberglass resin gets applied to the fleece it will have a tendency to swell and expand. Then with the added thickness of the vinyl, I know I'll need a bit of gap there. Once I have the front of this thing glassed in then I plan to do some detail work around the sides with body filler to close that gap with just enough room for the vinyl. With any luck, it will fit right in. Here's a couple pics of where I'm at. Glue is drying on the fleece. Once dry, I'll trim off the extra and use staples where needed. Hopefully I will have time to apply the resin tomorrow. The big accomplishment for today was just getting the sides of the enclosure they way I want and, most importantly, test fitting it in the trunk to make sure I can get it in there without issues. There are some limitations to how high and wide this enclosure can be due to the trunk opening size.
That is gonna look nice when done. Very clean!
What do you guys recommend. How many layers and what thickness of mat should I be using on the inside to strengthen this thing?
Here's the current state of the enclosure:
If you are going for a clean sounding daily car and do not car about staging ect, then sure drop them in a ported enclosure. Good work so far I would like to see this in person!
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Seahawks lose...only one thing left to do with the afternoon...FIBERGLASS!
Enclosure is coming along. I did some body filler work to an area on the front where the fleece wrinkled when I applied the resin. Now it has a nice shape to that area. Soon I'll apply a layer to the front and a few more to the inside. Then it should be close to a point where I can test it out and see how it sounds.
Glass...and more glass...tonight I basically wrapped the enclosure in fleece and fiberglassed the whole thing one more time. On the front baffle, I used some double thick woven mat for strength. This gave the whole enclosure a more rounded and less boxy look. I also used my router around the speaker holes to cut away the excess fiberglass so the holes are cut out. I have a little sanding to do around the speaker holes but not too much. I have some more chop mat and body filler to put on the hole thing and then it will finally start looking more smooth. I still plan to give it a test run as both a ported and sealed enclosure to see which sounds best. Can't wait to fire up THE BOOM!
Last edited by americannight; 02-10-2013 at 01:14 AM.
You have done some Beautiful work man..I think its going to sound, and look very nice when all done.A man taking Pride in his work deff pays off! this has been one of my favorite builds to watch.Very detailed, and full of information,and fantastic Pics!Excellent man..Very Nice Indeed!!
CA.com needs more build logs like this, great work on the build and the log.
97 4runner, 3RZ, 5 Speed
Headunit: Alpine CDA-9887
Mids: CDT HD-6CF
Tweets: CDT DRT-25
Fronts Amp: Hertz HDP4
Sub Amp: American Bass VFL150.1
Substage: 18" SSA ZCON
Electrical: 160 Amp Alt, Duralast Gold, C&D270FR, 2/0 Throughout
Thanks for the props. To elaborate on one thing I did here. If you look at the earlier pictures a couple posts above you'll see that I was a little sloppy with the resin around the speaker holes. There was some overhang of the fiberglassed fleece around the holes. I used a router to cut that off so the fiberglassed edge was flush with the speaker hole. There is a bit I had laying around from routing the edge of kitchen countertop flush with the edge of the counter. That bit works well here also.
Tonight I used some 60 grit sandpaper on an electric rotary sander to knock off the extra fiberglass mat from around the edges and also round the edges the way I wanted them. I also had time to apply body filler to about 2/3 of the front of the enclosure to fill in all the gaps and then sand it to shape with 60 grit paper. I've found that just using the sandpaper by hand without any sort of sanding block works well for this. I wear gloves while doing this to protect my hand. As the body filler enters the "green stage" I have been using a pencil to poke at it. When it has a rubbery sort of consistency, that's when I start to sand. I tear my sand paper into 1/4 sheets and pretty much count on the first sheet getting ruined. With the body filler still rubbery, it clogs the sandpaper almost right away but this is still an important step to get the shape the way I want from a 100 foot level and then once the filler gets a bit harder I grab a fresh 1/4 sheet and start doing what feels like real sanding. I'm happy with the result here. I was a bit worried because with this thicker fiber glass mat, it's basically double thick mat with a layer of chop mat on the bottom of the sheet and a layer of woven mat on the top, it didn't set as evenly as just the chop mat. There were definitely some hills and valleys. However the body filler made things nice and even. Based on my experience with this sort of mat, I see it's good for strength but if I'm just trying to make the surface smooth, it's better just to use the chop. I'm going to use just chop mat on the top of the enclosure and the sides where I am not needing to add strength, just smoothness. I will probably also add one more layer of the combo woven/chop mat on the inside. I have some work to do there to seal off the two chambers. In the front of the box, there are gaps where the rings protrude farther out than the enclosure. I need to seal off the middle. Here's how it's lookin':