if you go to a live concert of a string quartet, depending upon your seat, the hall and the spacing between the players, you may here the entire ensemble and not hear the violin and viola.
so the question is:
given a recording have you hear the violin and viola as distinct instruments on any system ??
i would advise you to take a recording and listen to it on other stereo systems and see if you hear the violin and viola , as indidual instruments.
the problem may be the recording, not the speakers.
if its resolution you want, a pair of quads or martin logan cls will do. perhaps roger sanders hybrid electrostatic may work , as well.
so the question is:
given a recording have you hear the violin and viola as distinct instruments on any system ??
i would advise you to take a recording and listen to it on other stereo systems and see if you hear the violin and viola , as indidual instruments.
the problem may be the recording, not the speakers.
if its resolution you want, a pair of quads or martin logan cls will do. perhaps roger sanders hybrid electrostatic may work , as well.