or "I think I'm going to need a bigger box" Let me preface this with saying: I've read the Cabinet Building 101 thread. I've built speaker cabinets before - a 6.5" 1ft^3 soft spoken bedroom B-box (84db 1w/1m, 50w), and a sealed 15 with better efficiency, but rolled off around 66 Hz. But I want more. I want what everybody else wants and can't have either - the mythical 1.5 ft^3 paint peeling low B box. But I'm prepared to deal with reality in small doses. I don't care if it's "Flat", as long as it's solid and won't be destroyed by a 5 string at volume. It doesn't need to be ridiculously loud, or terribly small. It doesn't really need gobs of power handling - I want a somewhat portable B box with reasonable efficiency - so my parameters are: Tuning at or slightly below 31 hz, adequate bass response for the low B, as high an efficiency as I can get through the rear door of a Honda Accord. Shooting for deep, but tight and solid. I slap some on my fretless, but not much on my fretted bass (the 5) - articulate but not really the modern super bright sound. I was playing around with WinISD and it seems that an Eminence Kappa 15LF in a 9ft^3 box tuned to 30 Hz is pretty flat down to 30 Hz. It has a shallow shelf beginning at 200 Hz, is down 1db at 100 Hz, 2db at 60 Hz, and 3db at 30 Hz, where it falls off. Group delay is a little higher, but I don't know enough to interpret those numbers yet. Has anyone experimented with sticking a driver in a cabinet intentionally oversized and tuned low in order to extend bass response? What are the tradeoffs of doing this? (Besides the obvious size increase.) Does anything really wierd happen that makes it unusable, unpalatible, or likely to destroy drivers?