4″ Wedge Foam panels are recommended when treating rooms with pronounced low-end frequency problems or where maximum sonic absorption is required, such as in drum booths.
4″ Wedge Foam panels are three times more effective at treating lower frequencies than their 2″ counterparts. A room could be treated with nothing but 4″ Wedge Foam panels to create an acoustic environment that doesn’t require further treatments.
These are also typically placed in a positive/negative grid configuration, or can be slightly spaced apart.



