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while I await my ES crossovers from ALK I have been playing with my series I LaScala's trying to improve the imaging. One well know mod is to wrap the K400 in Dynamat, I did that and listened to it for a few days, it was great with no negative impact and it did clean up the sound a bit. After enjoying the horn mod I decided to dynamat the upper box, the imaging is even better but you do loose some efficiency and some mid range, over all the modded side was a consistent 1dB lower, but the sound was yet again improved, modded the other side and imaging was yet again improved to the point they hardly resemble a stock LaScala, the listening fatigue is nearly gone. After talking to my local hifi shop that carries Klipsch, Vandersteen, Revel,B&W and Wilson we talked about the huge lengths companies like wilson and Vandersteen go to in dampening their cabinets, and with the theory that vibration leads to distortion my last and final mod was to dumpster dive my garage, I found some barbell weights and egg crate foam. A single 10# weight placed under the K400 in each speaker on a piece of egg crate to reduce vibration and additional foam randomly stuffed in the upper cabinet to reduce sound escaping out the back of the upper cabinet now makes for a little less efficient but much more accurate listening experience. Note: I do use a sub so I was not concerned with the loss of bass Power comes from a Rogue Audio Cronus Magnum rolled with KT120s so speaker efficiency are not a top priority with 100watts.