Guitarvet
Just wanted to post the results of switching the stock C90 12" in my new LSS to a Weber 12F150 (C12N) in case you are still having problems with muddy tone in your LSS.
The Weber is supposed to be a warm speaker, but wow, it really added top end brightness to the LSS. This improved the clean sounds, especially using the neck humbucker of an ES-335. However, the OD and distortion tones were too raspy, almost to the point of "ice pick in the ears." Dropping the treble and presence controls down helped, but the tone started to sound kind of lifeless.
I also tried adding a tweeter horn from a Fender acoustic amp to the stock C90 speaker with similar results.
I think the LSS does a pretty good job of balancing between bright clean and darker tones for overdrive. But now I'm thinking that a nice Bad Cat Hot Cat 30R with the additional controls for top end would give me even more flexibility than an LSS. I must be suffering from a GAS attack.