Coincidentally, have owned the KG 4, KLF 20 and KLF 10, all in a medium sized treated room powered by SET amp. Had the two KLF at the same time so the comparison was better than the memory of the KG 4s. Listen to chamber music, jazz, instrumentals, etc and rarely rock, hard metal, etc. Based on those parameters, I liked the KG4s but the KLF 10s have impressed me and prefer them to the KLF 20s. The integration of sound, the dynamics, vividness, and female vocal realities are all there with the two KLFs. However, the 2 way KLF10s seemed more natural not just to me but to friends and family. BTW, am no newbie dating back many decades in loving music reproduction.