Help me understand this if it's possible for my feeble brain to comprehend. I had an Avatar 112 cab, with the DeltaLFA in it. It was the newer, larger style one. It just didn't seem to have the SPL that I had expected from it, so I sold it. I had heard some guys say that the smaller, older one they made was really good, so I bought one from a fellow TBer. It has the Kappa 12A in it. Much better SPL, to my ear.And great sound! Now I have a chance to get a 3cu ft box for 2-12s, so I tried WIN-ISD Beta, on it, with 2 Kappa's Just doesn't look like it will work. Then I thought , well check the Avatar. So I measured it up. It's about 1.5 cu ft, with 2- 4"X1" ports. WIN-ISD says thats tuned at about 110 hz! And, shouldn't work at all. But it does,and has pretty good low end. What's going on? And if so, what would I port the 3cuft box at with 2-Kappa's? I know that reflex box science is not something that can be absolute, and stuff that shouldn't work, sometimes does, but for a novice like myself, it leaves me pretty much in the dark about what to do here. If you have time to mess with it, can you shoot me what you would do here? Thanks Guys!