I’m confused. I went to a pretty big and renowned store. I was told that EF600 is not enough for HE6se or Susvara. Way not enough. But that’s what I’m using at home! It’s working fine with the knob at 9 o’clock for decent volume. I didn’t believe this info at all. Am I mistaken or was he just saying nonsense to sell more expensive gears? What’s your thoughts?