where to place a single sub in a 5.1 system ?

any suggestions where to place a single sub in a 5.1 system ?

behind the speakers, in the corner ? any suggestions ?


hi mike. really it depends on your room and your prefernces, and the sub, to an extent. there is TONS of info on this subject and it all pretty much holds true. corners load the room and can be "boomy". out from the corner results in smoother response but less output. the method most often suggested, is placinf the sub in your listening position and crawl around the room till you hear the best sound and that is the idel place for the sub. go to av123.com and search subwoofer calibration. there is an extensive paper on the subject.
There's no reason that corners lead to boomy bass or that out from corners results in smoother response. You get boundary reinforcement near walls and the floor so simply adjust the level of the sub. Bass response is a function of the relative positions of the bass source and the listener within a given space. Many sub manufacturers suggest starting with corner placement. This would be especially advantageous if the sub was on the small side for the room. Then slide the sub down the adjacent wall toward the listener. Matching sub levels to the main speakers is probably more important than placement.

The article by Dr. Floyd Toole, "Getting the Bass Right" may be of interest: http://www.harman.com/about_harman/technology_leadership.aspx Click on the White Parers link.
"There's no reason that corners lead to boomy bass or that out from corners results in smoother response."

Um, this is not true. Placing subs in most any corner arrangement, WILL DEFINITELY (like, every time...) excite all the bass modes in the room, resulting in that boomy unnatural
sound that's most often described. In short, in-accurate distorted bass, that has many over-reinforced response peaks in the sound.
Now, unless your room is very small, and your corner placed subwoofer is then only causing a peaks and dips at only 2 or 3 frequencies, depending, you might find that there's only a bass hump of sorts, in regards to the response curve - in which case certain response attributes of your sub, your seating arrangements, and-or EQ settings (whatever) might not have you noticing too much unnatural sound and uneven response from the sub. However, placing the sub right at 3 room boundaries will, yes, most definitely cause you to have to somehow adress the bass response anomalies, for accurate response - even beyond simply adjusting output/volume levels.
One thing as an advantage (however, absolute phase is still to be considered, if not adressed) to placing subs in the corner, is that you can get more output and efficiency in the corner placement, and todays EQ's can do a superb job of smoothing out the response curve.
Anyway, I don't like the statement that "there's no reason that corner placement results in boomy bass". My experience says that does not compute.
Placement + integration/bass management = good bass.
Corners cutting will benefit no one. All rooms are different. Setting up sub - takes time and patients.
There are many ways to do it..........and few don'ts.