dont get ported whatever you do i dont know the dimensions but i do know that ported boxes do not let destortion out thus meaning you will not know when a speaker is blown until it puts a load back onto your amp and frys a tracer on your amp
not true. bandpass masks distortion. ported really doesn't. it just increases group delay over sealed.
anyway 2cu ft per sub, ported, 4" ID ports, tune ports to 34Hz use an amplifier with a subsonic filter and set the filter to 30Hz set LPF on amplifier to 60Hz set amp gain properly to avoid any distortion and those subs will do just fine and hit quite hard and deep.