Kij,
Bosendorfer Imperial Grand goes an octave lower than the standard '88'.
I have an early CD by Telarc, CD-80040 which shows the instrument off to best advantage.
http://en.wikipedia.org/wiki/Bösendorfer
Low pedal tone on a pipe organ goes to about 16hz.
But, you are correct in that unless you are a pipe organ fan the very low extensions don't do much or any good. Indeed, I had a preamp which featured a 'rumble' filter and my old NAD had a 20hz lowcut on the backpanel for the same reason.
Bosendorfer Imperial Grand goes an octave lower than the standard '88'.
I have an early CD by Telarc, CD-80040 which shows the instrument off to best advantage.
http://en.wikipedia.org/wiki/Bösendorfer
Low pedal tone on a pipe organ goes to about 16hz.
But, you are correct in that unless you are a pipe organ fan the very low extensions don't do much or any good. Indeed, I had a preamp which featured a 'rumble' filter and my old NAD had a 20hz lowcut on the backpanel for the same reason.