The ESLs even in stacked mode was too limited in the bass and high end. In comparison to my KLH Nine full range electrostatics. The DQ10 while not having the magic midrange of the ESL had better extension. I listen to a fair bit of organ music and the ESL can not handle it. The later ESL 63 does a far better job than the ESL. If vocals and mainstream classical is your flavor, the ESL (or stacked) would be the better because of the magical midrange.