Thanks hallock01, My room has always produced too much bass in the 36-42hz area. Going from a ported speaker to the YG sealed box design with the addition of the ASC traps helped quite a bit. The YG's are lean in the area my room is bass heavy. The result is a smoother frequency response...very happy with the YG's. Also this is my living room so if I have non-audiophile guests over I can move the traps to the bedroom. Don't like the idea of permanent room treatments.