Hi Everyone, I had the speaker go in my MB115 cab and replaced it with an Eminence Delta15LFA. I put a set of the delta LFA 12's in my mb212 combo and it made it a flipping monster, it has so much bass you have to roll it back when you're playing indoors. it has a ton of low end. I use a 700rb head and mb410/mb115stacked for gigs. I was expecting a similar result with this replacement but find that low end seems to be farting out/ is lacking low end as the factory speaker did. Could this be an issue with the size of the cab? Should I put another port hole in it so more air can escape? or is my issue that the MB heads produce more bass/sub bass vs the RB heads? I know this delta lfa's can produce earth moving bass... i can't wait to hear what everyone has to say... happy holidays!