After 3 pages its clear this thread is more about the 3015 and my poor cab building skills than the Fearful - just so you know. I have a couple Kappalite 3015s. I'm a little disappointed in the low end from them in the cabs I built for them which are similar to TL606s but with bigger ports ala Passinwind. Actually they are kind of cheesy - I tried to salvage some low end MDF PA cabs by adding lots of poplar bracing. Anyway, playing bars with my medium-loud band with my B1500 and home-brew 3015 cabs I found I'd keep adding bass and sub-bass as the night went on. The mids would get cloudier the more lows I would add. I'm wondering if I had a quality cab, like a Dually for those 3015s would they perform better on the lows? An efficient 4 ohm cab that delivered the lows would be nice with my Walkabout. Would like to keep the weight down too. And to make a long question even longer I'm wonder if anyone's tried a 6" with the 3015. It makes sense to me since the 3015s aren't really that smooth in the mids and it would free the 15 up to just work on the lows and low-mids I haven't seen this discussed on TB. The 3015LF Fearful seems to get all the glory. Maybe that's the way to go for me too but I have these 2 3015s and would prefer a 4 ohm cab. So what say? Could a 2x15 + 6 be the key to happiness with 3015s? BTW I play four string and occasionally tune down to as low as C sharp. I slap but the 6" should be plenty of high end for me.