I don't know. I read the review after your post. And I did read "my 16 year old ears" as his being 16, not as his having a 16-year-old son, though his status as a seller made the mistake obvious in context.
My sixteen-year-old ears. = My ears are sixteen years old. = I'm sixteen years old.
My sixteen-year-old's ears. = I have a child who is sixteen years old.
Exactly, a small syntax mistake, but it took a couple of seconds do deduce it properly so no biggie. Anyways, I don't like going off topic so I'm going to stop and wait for impressions.