With mid-bass EQ on the FA7, it's harder for me to discern, by ear, the difference between the two in terms of bass decay. I guess a handful of years on hybrids will do that. The sub-bass does seem more elastic to me on the FA1. : Ok, I checked out the aforementioned Digital Society track again, and I'm getting, marginally, a better sense of the kick drum attack on the FA1. My ears need a little more training in this area. What a difference a couple of years has made on the value proposition of Chi-Fi earphones. I have the M Final type E tips; I couldn't get them to seal properly in the FA7 with my ears. I may have to pony up for the L size. $25 shipped in the US for 3 pairs from MTMT Audio. I'm accumulating quite the collection of moderately-expensive tried-once ear tips. Does anyone in the US want to buy some Final Type E M, MandarinEs Symbio W SSMLLL, and/or SpinFit CP145 & CP155 L tips?