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AUDIO FORUMS >> General Discussion and Support >> Absorption sandwich question
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Message started by ZZuZZaXX on 03/24/20 at 05:15:39

Title: Absorption sandwich question
Post by ZZuZZaXX on 03/24/20 at 05:15:39

I have a friend that has these large JBL speakers with horns. The room he has them in isn't very big so he has them against the wall but he has an absorption panel about the size of the speaker, four inches thick, more or less, set on the back. Basically, it is the wall, the absorption panel, and then the JBL speaker, a sandwich. Is this something worth doing? My friend says it works wonders to control bass and I have to admit music sounds damn fine on his system, even when he cranks it loud, no distortion. At least no distortion detected from a set of amateur ears.

Is this a valid setup?

Title: Re: Absorption sandwich question
Post by Steve Deckert on 03/24/20 at 17:39:10

The most offensive colorations from speaker boxes usually occur around 400 Hz. Placing a 4 inch panel of foam in the air space between the back of the speaker and the wall does two things... kills the air space which could only amplify certain frequencies and an absorbs mid bass frequencies from 400Hz on up.

Steve