(3 cu ft uned to 30 hz for a 15" sub I am also in pa) - That looks like a nice box but the only thing is the sub im getting recommends 3.5-4.2 cu ft. Whats the price for that box incase i decide?
a hz like 30 would be a lot deeper and lower and like shake things off the wall bass, a hz like 40 would be louder to ur ears hitting the higher notes better like tingling ur ears and nose.