I made a pair of 3 way pa loudspeakers out of chipboard [3/4 inch thick] [dimensions of the twin ported cabinet.100cm hight by 50 cm depth by 40 cm wide]I've wadded only the back panel,and put bracing across the middle to help stop unwanted vibration. BUt When I remove the polywool wadding
It makes it much more effient and is much louder. So Is there any point wadding ported or vented cabinets. I know Infinite Baffle [sealed] cabinets need wadding to operate properly.Cheers -Rudi
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