RangerDangerV2 5,000+ posts
CarAudio.com Veteran
- Thread Starter
- #151
youre doing something wrong here, you cant use the whole volume of the rear chamber in the equation, because you have two woofers, so you need to use 1/2 of it. makes sense? so, with my tsp's for my sa12, which yours should be close, if you use a 1 cu ft rear chamber per woofer, that will give you an Fc of 44.57hz. Now, since it seems that you want to do a 2:1 ratio, you will need a rear chamber of 2 cu ft, and a front chamber of 4 cu ft, from what I can understand, you have 4.5 cu ft of GROSS volume. so in essence, you dont have room for a 2:1.A true 2:1 ratio of my available space of 127.99 would be 42.66l (1.5 cuft) and gives me an FC of 42.32If I used 2cuft for the 2 sa12s or 56.63l for the sealed chamber, I get an Fc of 40.22.
The smaller Sealed chamber gave me a higher Fc. I tried it again with both volumes using the T/s parameters on SSA's site and I got much lower FC's 39.6 (42.66l or 1.5 cuft) and 37.155 (56.63l or 2 cuft). I can not access the sundown site because it asks me for a password. The only T/s parameters I can trust right now is that of what Pete extracted. I know this may sound dumb, but would the T/s parameters that I have access to change due to me using (2) D4 Sa12's?