The main purpose of this thread is extreme bass impact and the best cans that deliver it.
The paper on the earcup test is a visual demonstration of each respective headphones level of impact - a tactile representation of how the bass of whatever can is tested as it would on the ear and surrounding skin area within the earcup.
I've never heard the ULTRASONE Pro900's but I've sure read a lot of members that own those particular cans remark on their noted bass signature.
It would be great to see the Pro 900's do the paper on earcup test to get an idea of how much bass those cans pack for sure, as they may well enter the top 10 listing as result
Thanks for the clarification. It's a very interesting criterion you guys have set up. Definitely unique. Good luck in your efforts to find the most massive bass pumping cans. As a basshead, I commend you for your efforts.