Kenjit, I didn't sense the frequency imbalance that you describe, nor was this remarked to me by any of the 30+ audio society members who heard Eos-HX at a club meet. I have also spent quality time with a friend's Calypso HDs. On low power SETs these had good tone and frequency balance as well. However, going back in time to an earlier model on display at RMAF 2010, I do recall hearing a bit of that in the GMA room. Show conditions can of course be problematic.
FWIW, I found that the 4 ohm Eos-HX relaxed considerably on the low impedance taps of my modified 75 wpc BAT tube amp.
FWIW, I found that the 4 ohm Eos-HX relaxed considerably on the low impedance taps of my modified 75 wpc BAT tube amp.

