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<blockquote data-quote="Mark_ab" data-source="post: 118899" data-attributes="member: 541433">I built it how I wanted it to look and worried about volume later. It&#039;s as risky way to do things, although I estimated airspace before I started. I sprayed the inside of the box with 5 cans of Rubberized Car Undercoating for deadening purposes, and it also provides a great barrier against water which is used to figure out exact airspace. To get a rough estimate before you start glassing, draw the area in common rectangles and triangles, and figure out the volume from there.&nbsp;I layed down duct tape on the area I was going to be fiberglassing on. Then I applied a thing coat of petrolium jelly (careful, it looks a tad awkward when you go and buy it at the local store //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif ) to all the surfaces. Then I layed down strips of fiberglass matt and resined over them. When it is dry I added more layers for strength sake, and then popped the mold out. That way, you don&#039;t stink up your car that much.&nbsp;I used two pieces of 3/4&quot; MDF which I cut out as a baffle, so that the sub sat flush and looked recessed. I then mounted the baffle to the fiberglass base using wooden dowels. This helped me to get the baffle elevated for the application of the fleece, as well as allowed me to play with the angle of the baffle.&nbsp;Thanks</blockquote>

[QUOTE="Mark_ab, post: 118899, member: 541433"] I built it how I wanted it to look and worried about volume later. It's as risky way to do things, although I estimated airspace before I started. I sprayed the inside of the box with 5 cans of Rubberized Car Undercoating for deadening purposes, and it also provides a great barrier against water which is used to figure out exact airspace. To get a rough estimate before you start glassing, draw the area in common rectangles and triangles, and figure out the volume from there. I layed down duct tape on the area I was going to be fiberglassing on. Then I applied a thing coat of petrolium jelly (careful, it looks a tad awkward when you go and buy it at the local store [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] ) to all the surfaces. Then I layed down strips of fiberglass matt and resined over them. When it is dry I added more layers for strength sake, and then popped the mold out. That way, you don't stink up your car that much. I used two pieces of 3/4" MDF which I cut out as a baffle, so that the sub sat flush and looked recessed. I then mounted the baffle to the fiberglass base using wooden dowels. This helped me to get the baffle elevated for the application of the fleece, as well as allowed me to play with the angle of the baffle. Thanks [/QUOTE]

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