hi pmbuko - from the chart at SVS website (http://www.svsubwoofers.com/subs_pci_performance.htm), it looks like the 25-31 and the 20-39 are pretty close, with the 25-31 having slightly higher SPLs for the 40+ Hz range and the 20-39 having higher SPL for the below 25Hz range. Are you saying this is a pretty significant difference that the 25-31 has in the 40+ Hz region ?
Also, if the 25-31 is custom tuned to 22 like JohnK suggested, then wouldn't it become even more close to the 20-39 (actually, it might lose something in the higher range since it has a smaller volume than the 39 ?)
Will an vanilla 25-31 still have some reasonable energy at the 20 Hz or should I ask for the custom tuning ? I am hoping to pick one of these two if I can get my wife to sign off on the cylindrical sub idea ;-)
Otherwise, I'll have to look at the much heavier (and more expensive) PB-ISD1 box.
cheers.
