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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: wall mounting polk speakers posted by Tom M on July 31, 2002 at 10:36:42:
There are few speakers that work well "up against the wall". There are some though that are expressly designed for wall placement. Some subwoffers are. The most famous of all was the Allison series - believed by some to this day to be the best/greatest loudspeaker ever made.Even if the port location is not an issue there are still problems. The problem stems from the fact that some of the sound will wrap around and bounce off the wall. This means that the same signal arrives at your ears twice but a fraction of a second apart -- hence the problem of "smear" or "muddiness". On top of this, the timing and distance are such that certain wave lengths will from the bounce will just match up with the direct sound and reinforce it while certain others will arrive negatively match up and cancell the direct source. Thie plays hell with frequenncy response. BTW, the cancellation is called "suck out" or the "Allison effect" (same name as the speakers mentioned above.
As you move speakers away from the wall, the effects mentioned shift to higher frequencies until you reach a point where the wave length is short enough that it doesn't mnatter for some reason. You may have read here that subwoffers/room interations are reduced by placing them next to a wall. This is one of the advantages of a sub-sat system: the sats can be moved out from the walls while the sub is pushed up against it. Often it is not so simple but you get the idea!
In principal, in wall speakers by being flush with the wall avoid all this. They have "other problems". If someday someone designs a model that resolves the "other problems", in-wall speaks will be the audiophile rage.
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Follow Ups
- Re: wall mounting polk speakers - sam9 13:21:14 07/31/02 (1)
- Great response Sam9! (nt) - Dalancroft 15:48:45 07/31/02 (0)
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