correct
well figure this, in a perfect world 100 % power gain should be plus 3DB (so 25% power gain would equal .75db right there) as far as cone area is concerned it works on the same scale with cone area (so another .75 db then)
So at min. we should anticipate a 1.5db gain and it certainly isn't a perfect world now is it?
remember
we gotta seal the wall off
deaden
charge
add a second alt.
dial amps in
break woofers in the match the coils
and find our new freq with that sub in (should go up to 49 or 50 instead of 48)