Replaced my LSiC crossover with a LSi9 crossover about a week ago. I have rewatched some movies & some movie clips. To me this made a noticible difference filling in the front sound stage. The LSi15 blend perfectly with my Hibred LSiC. The center dosnt have alot of low info sent to the speaker, & with the C Xover it seemed the low driver was dead most of the time. With the 9 Xover the low driver was more active & filled in the lows giving a fuller sound from the center. I dont feel the center got stronger but there is just more information being sent to the low driver so the sound is fuller. Watching movies at moderate vol level (under 75 db) with quiet dialoug scenes I didnt find myself reaching for the remote to turn the vol up. The C with the 9 Xover still uses one driver for the mids, one for the lows & the vifa for the highs, but there is more info being sent to the low driver. This suites my taste & I think now I can stop tweaking the center speaker. With the original LSiC I kept the center turned up about 2 db now with the new X over I have all speaker balanced equally. If your like me & have a LSiC & looking for a more equal sound this may work for you. Please note this will this affect your speakers warranty.