The GR/Rythmic subs have been the darlings of critics, and myself, at multiple RMAF's. They were clearly at or near the best bass in the show for more than one year. Dont have a clue why it underwhelmed when you heard it. I heard an identical pair in Danny Richie's living room... the bass was stunningly fast, accurate, and visceral.
Oh well, different strokes etc.