Jump to content

Question about sub dynamics


Recommended Posts

  • Members

If you're trying to get more output, you'll want them side by side on the floor. This allows them to couple with the floor and make better use of the boundary of the floor versus having the second sub hanging in the air. Here's a quick and dirty on boundary effect. It's a little misleading though. The second picture showing the speaker on the wall could also be the "floor" for the same effect. The first picture would be for like if the speaker was flown in the air with no boundaries around it at all.

 

http://image.slidesharecdn.com/pls20...?cb=1333091757

Link to comment
Share on other sites

  • Members

The 3rd ( quarter space ) is very misleading in regards to "sub" frequencies. 80hz is about 14 feet in length. This is the frequency where most feel the bass drum lives. http://www.soundoctor.com/freq.htm

If you place a subwoofer box about 3.5 feet from a side wall it will cause cancellation at 80hz. The 80 hz wave comes out of the speaker. Travels the 3.5 feet. Hits the wall and travels back to the speaker. The wave traveling this 7 foot distance now is 180 degrees out of phase with the next wave coming out of the box.. ( because of time required to travel this distance )

This also causes problems "around" 80hz frequencies as well as the size of the subwoofer frequencies is very large.

Avoid placing subs 3.5 feet from a side wall. Have them placed up against the wall or if possible 7 feet away from them.

 

This is a general guideline but it does show some of the problems when placing subs. Experiment with sub placement in a room. Sometimes a location that shouldn't be right works the best.

 

http://www.peavey.com/support/techno...ncellation.cfm

 

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...