Need help designing a horn for 2 DD1508's. I understand the concept but how do you tune and know there is enough air space. How do you know what angles to use. I have all the tools just need a design plan. If someone would like to design one for me that would be greatly aprieciated.//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif Will be going in a jeep liberty.