Axiom Home Page Forums General Discussion Home Theater Sub crossover adjustment poll

Chess, since Jeff hasn't checked back in let me point out that the BFD( Behringer Feedback Destroyer) site is at behringer.com and that there's a very detailed discussion of it at snapbug.ws/bfd.htm. Software at etfacoustic.com/

Just to add to what JohnK said, the ETF sofware is pretty expensive to buy but the demo version works fine for measuring your sub's freq response (you just can't save data files). You can find more info about using ETF and the BFD together by searching for the two terms in the Speakers section of www.hometheaterforum.com. Also, here's a page that has a pretty good guide of the process: http://www27.brinkster.com/jmag999/

I recently found an interesting article right on this topic at hometheaterhifi.com...

Miscellaneous Ramblings on Subwoofer Crossover Frequencies

It recommends, among other things, an identical subwoofer crossover frequency for all main channels.

They bring up some good points in that article on a variety of ups and downs using multiple methods of subs and crossovers.
As per usual, it comes down to room dynamics and personal preference.
In using my EP350 as the sole LFE channel while setting the M60s to small, the bass produced was way overbearing and too heavy for music. The port chuff was also more prominent into higher frequencies.
The M60s handle the bass in a far superior way than my EP350 so i've turned the crossover down to a bit less than 50Hz where the M60 and EP350 bass notes no longer sound muddy as they cross on the frequency scale. I have accepted the trade off that there is a short hole in the frequency spread between the bass of my surrounds and sub, but hey, how often should heavy bass (below the QS8 cutoff approx. 95Hz) be played by surrounds anyway?
The QS8s were not exactly designed to rumble the walls beside my head.

They are right. Fast bass is an oxymoron. But if i had wanted a dance club in my basement, i would have added a disco ball along with the booming bass. I think i'll keep my EP350 tucked away small to continuing managing the 50Hz and less range.