Reply to thread

Message

<blockquote data-quote="Subless" data-source="post: 8495322" data-attributes="member: 669685">Checking the specs for this sub, I calculated that the total volume of the suggested box is about 1185 cubic inches at 16.125 x 14 x 5.25&quot;, butactually it would be less by a factor of 3/4&quot; wall thickness which should be about 14.625 x 12.5 x 3.75 = 685 cubic inches.In order to achieve that in a 12&quot; diameter tube, it would have to be at least 6&quot; long and probably more like 7 due to thickness ofthe tube walls and then adding 1.5&quot; to the tube length for each of teh 3/4&quot; ends of msb or whatever, so 8.5&quot;.I just measured for 14&quot; diameter concrete tube above the wheel well and I think that will also work.Not counting the thickness of the walls of the tube, the volume is 3.14 x 7 x 7 = 154 square inches per 14&quot; diameter.685 / 154 = 4.45&quot; for length of tube and it would be probably more like 5.5&quot; ifI took into account the wall thickness and finally 7&quot; if I add the top and bottom 3/4&quot;. But that seems doable.Wondering if anyone knows how to strengthen a tube? - fiberglass?Any other means that&#039;s not as messy or potentially lumpy? Sheet metal wrapped and glued/screwed around it?</blockquote>

[QUOTE="Subless, post: 8495322, member: 669685"] Checking the specs for this sub, I calculated that the total volume of the suggested box is about 1185 cubic inches at 16.125 x 14 x 5.25", but actually it would be less by a factor of 3/4" wall thickness which should be about 14.625 x 12.5 x 3.75 = 685 cubic inches. In order to achieve that in a 12" diameter tube, it would have to be at least 6" long and probably more like 7 due to thickness of the tube walls and then adding 1.5" to the tube length for each of teh 3/4" ends of msb or whatever, so 8.5". I just measured for 14" diameter concrete tube above the wheel well and I think that will also work. Not counting the thickness of the walls of the tube, the volume is 3.14 x 7 x 7 = 154 square inches per 14" diameter. 685 / 154 = 4.45" for length of tube and it would be probably more like 5.5" if I took into account the wall thickness and finally 7" if I add the top and bottom 3/4". But that seems doable. Wondering if anyone knows how to strengthen a tube? - fiberglass? Any other means that's not as messy or potentially lumpy? Sheet metal wrapped and glued/screwed around it? [/QUOTE]

Verification