Though the gragh does show a roll off at around 60 hz it does not account for in room response. The specs are listed for the M80s at +/-3dB (Hz): 37 - 22kHz.I would have to say given their frequency response from the spec sheet the 80s would have very good output down in the mid 30s.

Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud