Drew in the desert Posted November 15, 2005 Share Posted November 15, 2005 I have had my BFD incorporated in my system for several months now and just recently I've starting rethinking the way I went about calibrating it. I bought the BFD to tame the peaks in my room at the low frequencies. The first thing I did was figure out which frequencies needed to be dialed down. The way I did this was by playing 1/6 octave test tones from 16Hz to 160Hz. I ran the tones from the DVD player through my receiver in "Stereo" mode. Is this the correct way to do it? My initial thought was that playing the test tones in "Stereo" would help my control the frequencies around the crossover point (80Hz). But, now that I have put some more thought into it, would it make sense to run the test tones in another mode such as Pro Logic? I mean if I calibrated it in "stereo" mode, what happens when I am listening to somehting in Multichannel? Also, I think that Denon receivers run the mains as full range when in "Stereo" mode regardless of the large vs. small setting in the OSD menu. Any thought? For those of you that are using EQ's or a BFD for your sub, what playback mode did you use when playing the test tones? Quote Link to comment Share on other sites More sharing options...
Cal Blacksmith Posted November 16, 2005 Share Posted November 16, 2005 I would like to help but to me BFD = Big Freeking Deal so I am of no help[] Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted November 16, 2005 Share Posted November 16, 2005 I set mine up in the stereo mode. My receiver allows me to set the mains to small in the stereo mode however. Quote Link to comment Share on other sites More sharing options...
TheSoundBroker Posted November 17, 2005 Share Posted November 17, 2005 I use BFD's for all my larger (Ref 7 and THX Ultra 2) setups. I normally use a calibration program thru a laptop and run a full sweep in 2hz increments. I'll run sweeps thru just the LFE, then thru the LFE and mains...then turn on the "party" or 5 channel stereo mode and run a full system sweep. Take a composite of all the sweeps and see what stands out. Use judiciously...better to have a gentle peak than to get huge dips. This, by the way, is what your dealer is SUPPOSED to do for you when they sell you a big Ref or Ultra 2 package. If they don't...why not? Also, run the sweeps from multiple positions so you get a good look at what the room is doing. Remember...room treatment first, followed by positioning (preferably with a laser alignment system), followed by EQ. Oh...and for those who don't know...BFD is short for Behringer FeedBack Destroyer. A really, extremely flexible tool for subwoofer and low frequency tuning. Cheap as hell, but not the easiest thing in the world to use. You hopefully won't need one in the future as Klipsch will eventually be coming out with...OOPS...CLAMP HANDS OVER MOUTH....[6] Quote Link to comment Share on other sites More sharing options...
DrWho Posted November 17, 2005 Share Posted November 17, 2005 You hopefully won't need one in the future as Klipsch will eventually be coming out with...OOPS...CLAMP HANDS OVER MOUTH....[6] Ah finally [] Quote Link to comment Share on other sites More sharing options...
redtop Posted November 17, 2005 Share Posted November 17, 2005 Drew, I don't have a BFD (thinking about it though), but I wanted to let you know that there is a room testing program that was written primary for use with a BFD. It's pretty simple and straight forward and the best part...it's free! It's called RoomEQ Wizard. Info on-line here...http://homepage.ntlworld.com/john.mulcahy/roomeq/index.html Hope that helps...[] Quote Link to comment Share on other sites More sharing options...
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