Just for the fun of it, I decided to make a series cable and run my two 4 ohm 110/6 cabs as an 8 ohm "add-on" to my fEARful 15/6. This boosts my Carvin BX1200 up to 1200 watts into 4 ohms (bridged). I have some 110/6 cabs I built a while ago that are loaded with BP102's (4 ohm speakers) and no internal crossovers so the jacks for the BP102's are separate from those cab's 6" mid drivers (I bi-amp with them). The BP102's are rated at 200 watts each, with 6.2mm xmax. Not a 3015LF, but not too bad for tens either. I realize the pair of BP102's can't keep up with the single 3015LF. But I wired up the cable and plugged them all in. Granted, because of no crossover, the BP102's are getting the full monty of the entire frequency range, not just lows (and the mids in those cabs aren't even connected). But...what it did tell me was exactly what I was expecting. HUGE volume!!! I know...well, duh! I was testing it because I have no fEARful 15 Sub or the funds to build one at the moment. I wanted to see what it might be like to add a 15 Sub for outdoor gigs. Hell, even just running my rig as seen below it is VERY loud and still pretty clear with only the 18Sound mid and any upper content the BP102's are putting out full range. I can only imagine what a fEARful 15 Sub would do. More low end, more volume and even better clarity. It would be massive sounding. I'm not intending to run it this way at a gig and I know about mixing the speakers...not a great idea to run with. But I just wanted to see what adding more speakers to an already outrageously loud and clear fEARful would do, and how my BX1200 handled it at it's max output (although I couldn't really max it out, nor would I want to). Then again, in a pinch on a really loud outdoor gig, I could swing this setup if I really needed the extra volume so as not to put too much stress on the 3015LF, even if I did have less than ideal sound overall. That would be about the only reason I'd ever do it. Just having some fun. I envy you guys with dual 15/6 cabs or the 15/6 with a 15 Sub. Freaking cool. I thought fEARfuls cured my GAS...just makes me want to build a fEARful 15 Sub!!!