good read. i have 2 cerwin vega 8's. i will be attaching a 6 foot sonotube to them and see what happens. i wonder what would happen if you were to make 1 from that 2 inch tang band sub off parts express. maybe a 2 inch pvc about a foot long. i'm confused on how to tune something like that.
edit: nevermind about that tang band. sub has to be around 40hz resonance. it won't work.