I assume you mean "SE"? Never heard of the CS2.4 SB.
Most differences are cosmetic: veneer and finish, stainless steel outrigger spikes and driver screws, laser-etched binding post plate. The *only* sonic upgrade was Clarity SA caps on the coax feed. That’s it. You can read about it at Ultra Audio and EnjoyTheMusic.
IOW, the drivers are identical. There is nothing to upgrade there. Rob Gillum can repair them if need be, and he has the Clarity SAs if you want to upgrade from the stock Solens. But I would wait to see what Tom Thiel comes up with. I think he’ll have an upgrade path that will handily surpass the two Clarity SAs.
Most differences are cosmetic: veneer and finish, stainless steel outrigger spikes and driver screws, laser-etched binding post plate. The *only* sonic upgrade was Clarity SA caps on the coax feed. That’s it. You can read about it at Ultra Audio and EnjoyTheMusic.
IOW, the drivers are identical. There is nothing to upgrade there. Rob Gillum can repair them if need be, and he has the Clarity SAs if you want to upgrade from the stock Solens. But I would wait to see what Tom Thiel comes up with. I think he’ll have an upgrade path that will handily surpass the two Clarity SAs.