I wanted to build a fiberglass box but you cant build a ported fiberglass box because of the fact the volume isnt always what you expect it to be right? or am I wrong? in my trunk I have up to 40 wide between the two wheel wells and the sky is the limit in height or depth. I havent decsided how many hertz it should fire at I want it to sound good at a lower level and have a high Spl when I want it.
How do I ake a port plug? what should I shoot for how big of a port would I have to build to get 44 Hz and then use a port plug to get it down to 32 HZ for DD. sound like a good idea or am I way off track>?