Not to poop on Paradigm's parade, but I find this confusing that 2k pair of large towers rated at -2db 50hz and a cheaper large bookshelves (BMRs) claim to have -2db 34hz bass response.\nAm I missing something here? (besides the obvious difference in sensitivity)Where speaker sensitivity is concerned, something called “Hoffman’s Iron Law” takes effect. It offers you any two of the following: small cabinet size, deep bass and high sensitivity. You can't have all three at the same time. See http:\/\/www.salksound.com\/blogtopic.php?id=3\nThese paradigm speakers have a 92 db sensitivity and the BMRs only 85 db. So the Paradigm is 7 db more efficient and that is a lot.I find 89 dB sensitivity for those Paradigm speakers believable, but not 92 dB.\n\nIn his review, shadyJ said:\nSensitivity measurements for 2.83v at 1 meter were measured at 88.8 dB for the 800F [tower] and 89.7 dB for the 500C [center speaker]. This is close to Paradigm’s spec for this rating which is 89 dB anechoic for both speakers.\n\nIs the sensitivity rating of 92 dB a number provided by Paradigm? Is that additional 3 dB of sensitivity an in-room estimation, or is it a number provided by the marketing department?