Is it possible to get hearing damage from loud bass? Do low frequency sounds do less damage than high frequency sounds at the same decibel level? I've just never felt my ears disturbed by loud bass, so that's why I'm asking.

all nerves can be damaged by loud sound AFAIK, the only thing is you really won't notice it that much due to so little occuring around those frequencies.  it is really only the high ones and mid range i.e vocals that you will notice it.