So right now im using a 15 RE SRx giving it double RMS.
My box is around 3.2 net cu ft, @ 30 hz or so, with a 3" PVC pipe port. Yes there is port noise and it sounds bad and not that tight when loud.
So what should I give it? RE web says 3cu ft. If I could go smaller but get slightly less volume (but more useable since it sounds cleaner) id rather do that.