The tweeter of the GH is a variant of the Dynaudio Esotar. The GM's tweeter is the scan speak revelator ring radiator. Both speakers use the Audio Technology mid-bass driver, one of the best IMO. The GE I believe uses scan speak drivers for both the tweeter and mid bass. Curiously, the flagship The Sonus Faber and the just released Aida still maintain the audio technology midrange driver.
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