I think it makes a big difference what kind of headphones or speakers you're using. The first time, I did it with no headphones at all, the second time I wore headphones and with headphones, I could (barely) hear the whole range.
Here's another thing I've noticed. I had an easier time hearing the 22 frequency than a couple of them below it. Makes me wonder if some of the frequencies were mistakenly placed out of order.
5w6 or 9w1 sp/so/sx, I think