Every lyrics page out there has 'a**'. But if you understand the lyrics (which are talking about Superman's DJ gear), 'amps' makes more sense since amps need fans. The amps that Superman would use to drive his three-stories-high speakers would require considerable cooling, available most efficiently by utilization of said 'Superbreath'. [Ed.'s mote: Not having any luck finding a web page with this song on it, I'll have to assume this person is correct.]