SWR LA10 replacement rig for practice being designed. Am looking at using a pair of Alphalite 6A (http://www.eminence.com/speakers/speaker-detail/?model=Alphalite_6A) in an a la MiniMark 2x6 style cab. Recommended vented volume is .1 to .6 cu. ft. for the drivers. Being a bass cab - looking at a Vb of 1.1 cu ft for the pair. Been playing around in WINisd and am considering a port tuning of the box Fb at 53Hz. Trying to compromise between farting and drop off. Will be using with a G-K MB200 and a 4 stringer. MiniMark low is spec'd at 59Hz for similar cab design and similar speakers. 1/2" ply should bring this box in sub 20 lbs. Bracing not drawn. The Eminence site has a vented mid/bass design for a single driver with a Vb of .55 and an Fb at 82.51 (w/ HP at 75 Hz or higher). Figure this will fart out at the low E for sure with this design sans HP at 75Hz. Looking for opinions on what the best tuning frequency should be for a box using a pair of these 6A's?