I heard them at the RMAF, twice. Initially impressed, I came back the next day. Something bothered me but I knew not what...until I visited either the Selah or Salk rooms and heard speakers that used ribbon tweeters. Then I knew what bothered me about the IDSs--poor-quality treble. Those large (for tweeters) cones just don't do treble well.
...FWIW
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...FWIW
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