Whats port width of current box?
also, does the sub closer to the port move more or not insync?
Using 5" wide port you are at about 4.5cuft after all displ. That should be the issue.
no new designs last i knew, i had a few come in about 2 months ago and they were the same style
They need to work on it.
I want to order t-shirt but design of it sucks
Guess they spend more time on subs and amps design rather then t-shirt
wish there was one for the team sundown members