tweaking the sub in older MLs

[IWalker]

True enough..., but they are not expensive speakers to begin with, and i'm not going to add $1000 tweak to a $600 set of speakers. ain't happenin'.
for that kind of dough I could just buy better MLs (well...w/a little more).

all i'm after really is to add some gain to the whoofer. that what it needs. thats why the new ones have them...and sound 100x better than the ones that dont.
ymmv.

oh, and no. not a "real" mainer. NH native. lived in CO for 4 years and then moved to Maine in '01.
My kids are all "natural born mainers" though.

straight bi-amping can add that gain too... not to turn you off the DIY route... just an added suggestion