a few different fiberglass questions
Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=11064
Printed Date: August 20, 2025 at 6:54 AM
Topic: a few different fiberglass questions
Posted By: 98greenlude
Subject: a few different fiberglass questions
Date Posted: March 18, 2003 at 8:15 AM
hi i have a few questions about my box constuction. im constucting a fiberglass enclosure for 2 12's and i dont know if i should make a divider between the subs (u know to make 2 seperate chambers)? how many layers should i make it? the subs are pheniox gold titaniums and they will be getting 500 rms apeice. and the enclosure is going to be in the spare tire well. one last question, i have some of the materials now id say enough for 3 layers. approximatly how much total mat and resin will i need, so i know how much more to buy. thanks
Replies:
Posted By: veedubbiker
Date Posted: March 19, 2003 at 3:46 PM
I have a litmited experience with fiberglass, but the one thing I did learn was, use as much mdf as possible, just use the glass for round or curved parts. I made an entire box for 2 tens out of glass, it took me forever to finish, and that was only because I cut it short. In any box its a good idea to make two separate chambers, but not necessary. For 2 twelves I probably would just for the extra support it would give the box. I'd start off with a gallon can of resin, where I get mine they give you a tube of hardener to tgo along with it. How much mat you need depends on the shape of the box, the size of the box, how think you want it, etc. I started off with about 5 yards of cloth I think. Look around at installs and prograss pics to get an idea of what you'll need to do.
-------------
-Matt
Posted By: audiomechanic
Date Posted: March 23, 2003 at 10:29 AM
what you would want to do is use a MDF divider. you can glass it to the bottom portion of the box. if you are going to have a glassed top you will have to figure the brace into the design of the top part of the box. if you are gonna have the top part be a flat piece of MDF....you and jut measure the MDF so it hits the top and bottom of the box.
and for the quanities of the materials....it does depend on the size and shape of it. you can just buy a couple gallons of resin and a couple yards of chop mat. the thinner the chop mat you use the more layers you want to add. i usually use a 3 oz mat for the foundations. this is about 6-10 dollars a yard. you want the parts that are glassed to be about 1/4-1/2 inch thick. the more curved it is the thinner it can be. but for the base portion, i would make it pretty thick. go for about 3/8 on the bottom and a little thicker on the sides. you can always add something like pieces of rope or things like that to the base portion to give it more strength. it isnt the rope that gives the strength it is the shape and added curves of the glass. by going with the rope technique you can make the sides and bottom a little thinner.
-------------
|