I been browsing speaker cabs on the Web with my new found knowledge of frequency response acquired at talkbass. I wanted to find a solution to my sound dropping off below E1 as I often need to detune to D1 (36.71 Hz according to this chart http://www.contrabass.com/pages/frequency.html). But I have just gotten more confused. Check this out: Bergantino NV215: 37hz - 7khz HT322: 39hz - 18khz HT210: 36hz - 18khz SWR Goliath III: -3dB @ 40Hz and 15KHz Goliath Jr.: -3dB @ 45Hz and 15KHz SOB 1X15: -3dB @ 45Hz and 15KHz I thought that larger speaker diameter would allow for lower freq response. What's up with that? edit: (Thanks Munjibunga!) Regardless, upon reading this excellent thread http://www.talkbass.com/forum/showthread.php?t=118747 I'm blown away at the unique issues we as bass players have to deal with in regard to getting even sounding tones and perceived dB levels. This was never an issue for me until I began playing live in many different rooms. I understand that D1 and E1's fundementals emit less dB than their first harmonics. I'm not sure if the lack of preceived loudness is a result of this or not. All I know is when I play C2 it feels like I'm getting smacked in the back of the head! The conclusions I have come up with are these: -Every room is completely different and that it is impossible to get what I want all the time outside of pure luck. -I currently run a Goliath II rated at -6dB @ 40 Hz and 12KHz and switching cabinets will (mathmatically) have no effect on the issue I'm currently having. Unless of course I want to get a 15 and lug around two 90lb. cabs. -Switching from 10's to 12's or 15's will just present me with new problems associated with punch and attack. I am now wondering if maybe my 10 year old cab's speakers are just tired and ready to retire, and that's the reason they can't keep up when playing D1. I'm also wondering if possibly the added string travel resulting from lower tension when tuned down to D may be too much for my stock MIM Jazz pickups; but I'll tackle that in the other room.