It's very subjective, but I'd say yes. Most notable improvement was a more transparent sound, which I think are stats best attribute in the first place. The woofer stock caps really were cheap, so with the upgraded caps I haven't felt compelled to go electronic X-over for the woofers, as some on the site have advocated. I haven't yet done anything with the Theos stat caps, but I have bypassed the X-over for their woofers. Oddly, the biggest improvement I heard was from the stat panels, with (again) a more transparent, detailed sound. The only thing I can think of to explain it is that I power the Theos with a Parasound Halo A31, which operates in class A output for the first 5-10 wpc before going into class AB. Now that it is pushing only the stat panels it may be staying in class A mode (almost) all the time, at least more so than when it was driving both the woofer and stat panel.