Art80342, I spent about a week listening to the K2, in a very controlled environment. My opinon comes from listening to both speakers, both with amps that I know and also those that I do not.
Either way, the K2 is an easier setup (it can be close to the rear wall), with greater coherence between the bass and the rest of the speaker (not surprising since the woofer is driven by the same amp that the midrange is). I found the speaker very easy to drive for 'only 93 db'. I think JBL is being conservative. The impedance curve is also easy for lower-powered tube amps. I found 60 watts to be nearly impossible to clip- literally so loud earplugs were required.
Either way, the K2 is an easier setup (it can be close to the rear wall), with greater coherence between the bass and the rest of the speaker (not surprising since the woofer is driven by the same amp that the midrange is). I found the speaker very easy to drive for 'only 93 db'. I think JBL is being conservative. The impedance curve is also easy for lower-powered tube amps. I found 60 watts to be nearly impossible to clip- literally so loud earplugs were required.