profundus-sanus 10+ year member
CarAudio.com Veteran
i've tried it several times either way, and the box is always more efficient if you don't have the port firing into itself like that.Haven't had any cancellation issues although I have heard this claim before. I have had tremendous output as is and 38Hz doesn't murder the lows like my dub7 did, but the output is way more! I pulled up to my friends work and he said, "****, that bass is clean!" Then he hopped in and was blown away by the output. I was suprised those 1508's took Late Night Tip like a champ!
i just put 2 45's together in there.
something like this