I recently picked up a pair of La Scalas for $1250. One owner and in really good shape. Not being one to leave well enough alone I built the ALK universal xover. When i finished one I put it in so I could hear them side by side. What a difference... The boominess down low is gone. The tweeter and mid are louder isnt really the right word but more articulate. Crisper and faster sounding. I am really impressed. esp for the $200 the parts cost. Any Las Scalas owners on the fence about doing this shouldn't be. its sooo much better.