8", and even 10" sealed subs will roll off fairly high unless equalized or some sort of servo feedback is employed. Ported or passive radiator designs will give extra bass extension at the cost of larger cabinets and reduced transient response. If the subs are expected to play higher frequencies,say 100 Hz, that transient response becomes more apparent. Below a certain point, it's more just "rumble", not that that's a bad thing.
I agree with Duke but there are limitations of smaller sub drivers that can be reduced partially with multiples. That said, I'll be starting work on dual 10" subs soon.
I agree with Duke but there are limitations of smaller sub drivers that can be reduced partially with multiples. That said, I'll be starting work on dual 10" subs soon.