Lately I been blown away by the extremes that people go to one this list when it comes to equipment. This one has got to take the cake. There are basses coming out now with a string tuned a fourth below low B. F# to be exact. What the h*ll for? This is below the lowest note on a piano. What do you call it? F#(-1)? What kind of system would you need to even approach being able to reproduce it? I think an array of 18" subs would do. What frequency is the fundamental? Let's see A0 is 27Hz. F#(-1) must be about 17Hz? This would be useful for talking to elephants. I can barely find places to use low B in a musically meaningful way, what the heck would I do with F#? I am not asking people to convince me that this is a really useful tool for creating music. I doubt anyone could. Maybe this is just another attempt to outgun the other guy. I just gotta ask myself, where does this insanity end?