So I had been running my SLC's in stock form for about 2 months now. Loved the midbass, felt the tweet left a little to be desired when setup off axis. Sunday I purchased a set of CAL25 fabric tweets + crossovers from the X-plain line (Thanks Don!).
Last night after I picked them up decided to throw them in. First impression was WOW the change in depth is amazing. I noticed it right away and the tweets aren't even broken in yet mind you. These play MUCH better off axis and so far have provided me a much smoother transition and cleaner sound. What also blew me away is that these tweets are MUCH louder at lower volumes vs the CAL2045's. They are VERY efficient. I didn't change the gain on my amp at all and noticed all these differences. I feel as though the tweets can now hang with the midbass with ease(They probably outshine them, though the SLC midbass is pretty nice at that specific price point).
The crossover point also changed from 3800hz in the slc line to 3200 with the xplain crossover, seems like this assisted in bringing the front stage up to near eye level. I believe I may need to turn the level to soft within the crossover unless they warm up once they are broken in. Overall I am super pleased with the transaction as well as the change in sound quality. I will follow up more once they are burned in. Right now I'm very very content
Btw they are comps are being ran off the front channels of my 4150xxk.