grizzlybeast
My name is grizzlybeast and I'm an audioholic.
You need to buy this headphone. The sub bass is spectacular.
10hz seems audible even though it is not, during tone sweeps there was some fluttering of the drivers. 20 hz is very audible, 30-40 hz is fully kicked in and rich.
Curious what you mean by fluttering- do you just mean you could feel the air pressure from the subass notes?
(just a little confused since I am most familiar with this term as a type of bass distortion that can happen due to overdriven/damaged diaphragm where it becomes unable to sustain low tones producing a 'fluttering' effect, but seems unlikely this would be happening in this case).
10hz is so slow that it sounds like a fast fluttering and you can notice it on the Eikon. No distortion.
The Eikon is the headphone I have been wanting to exist for a very long time.