To seal or not to seal ...


I have a small room (12'6" x 12' x 10')that I'm planning to use as a listening room. The room has a floor of ceramic tile on a concrete slab, concrete block walls and ceiling of plywood sheet.

The room is completely sealed except for a 6" opening along the top of one wall. I'm thinking of sealing this 6" opening to provide some increased acoustic isolation, but I'd like to know whether this would be a good idea. In particular I want to know the likely effect that sealing the opening would have on the bass performance in the room.

If sealing would adversely affect bass performance is there something I can use to absorb the high and mid-frequencies without affecting the bass?
wcvb

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