if this is the sub you have here is the manual. even the old school quart subs slammed hard ported and kept the sq very high. whoever told you they "can't" be ported doesn't know the product at all.
I'm going to bump this with a question for anyone who can answer it. Last time up still trying to decide what to do as the Eclipse amp crapped out on me again today when I was driving and it's really starting to piss me off.