Originally Posted by ssc456
thats your problem there, sub woofers work best when they are in a completely air tight box if you cut a whole in it your gonna let all the air escape and it wont be as crisp
technically that's not true.
a completly sealed box is the least efficient design for a subwoofer.
depending on the size of the box and the size, shape and positioning of the hole will depend on what sort of hole may be best. and the positioning of the speaker withint the box, and what it faces.
typically the smallest loud design is a reflex cab, this has a hole (port) the size and shape of the hole is made to tune the cab to a specific frequency (usually a very low frequency) to help prevent the natural roll off of the frequncy response.
there is software out there to help design these style of cabs, (winISD is good).
anyway... that's besides the point because you're not making a speaker cabinet, you already have one!
are you trying to put a home cinema sub in your car.
or a car sub in your home cinema?