To suppress the dirchilet (sp) effect (drum) I followed Mark Bellum’s advice and mounted an uprite 4x4 under the center of my enclosure base to prevent vibration. The foam duct wrap I used to act as cheap dynamat was nil to minimal effect, but the homemade MLV (alum flashing w/ rubber tape on each surface) removed 20 decibles on it’s own. MLV is very expensive and I had that stuff laying around. Couch cushion foam does nothing but acoustic ceiling panels added roughly 5 more decibels of reduction. A solid door is much quieter than one with a window. All these items are credited to Mark Bellum and remember not to [quote=“mbellon, post:5, topic:5016”]
SCHNAPPEN DER SPRINGENWERK, BLOWENFUSEN UND POPPENCORKEN MIT SPITZENSPARKEN
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I will yield to Mark.