Tim Brewers
Agent
- Joined
- Jan 14, 2001
- Messages
- 48
hey people, sorry this is kinda off topic, but I can't seem to find the answer and was hoping all your collective knowledge could help me out.
Ok, I built a sub box for under the back seat of my truck.Pics here
I plan on putting two IDQ10's v2 in there. Specs Ok, the subs are recomended in a .25 to.50cu' box. My box has two seperate chambers, both are .85cu'. So how would I make the air space smaller? One way we discussed was adding some 2x4's in there to make it smaller. There are two problems with that, 1. It would take almost 10' worth of 2x4 to get me to the .50cu' range, and 2. this would be adding a lot of weight.
BUT, someone recomended putting some of that blow in Polyurethane Foam insulation, like that is used around a window in a home. This brought up a couple questions, would this actually act like polyfill and add to the cu', or would it work to lower the air space?? This also brought up the question of why polyfill works as it does? Is it the air space in the material, or does it have to do with the "spring" effect of the material. So when the sub pushes against the air space in the box, plus the polyfill, the polyfill springs back, thus creating the illusion of more air pushing back??????
Ok, so after all this, my main question remains, will this expanding foam work to lower the air space in the box? Plus I am pretty much stuck with these speakers, so I would appreciate not having a bunch of replies to use other speakers, it is just not in the budget right now. :frowning: Thanks much for the help.
Brew
Ok, I built a sub box for under the back seat of my truck.Pics here
I plan on putting two IDQ10's v2 in there. Specs Ok, the subs are recomended in a .25 to.50cu' box. My box has two seperate chambers, both are .85cu'. So how would I make the air space smaller? One way we discussed was adding some 2x4's in there to make it smaller. There are two problems with that, 1. It would take almost 10' worth of 2x4 to get me to the .50cu' range, and 2. this would be adding a lot of weight.
BUT, someone recomended putting some of that blow in Polyurethane Foam insulation, like that is used around a window in a home. This brought up a couple questions, would this actually act like polyfill and add to the cu', or would it work to lower the air space?? This also brought up the question of why polyfill works as it does? Is it the air space in the material, or does it have to do with the "spring" effect of the material. So when the sub pushes against the air space in the box, plus the polyfill, the polyfill springs back, thus creating the illusion of more air pushing back??????
Ok, so after all this, my main question remains, will this expanding foam work to lower the air space in the box? Plus I am pretty much stuck with these speakers, so I would appreciate not having a bunch of replies to use other speakers, it is just not in the budget right now. :frowning: Thanks much for the help.
Brew