I have a pair of speakers in my basement that have a sensitivity of 105 dB @ 1W. The setup is also using an active crossover, and 3 different amps for each range of frequency. I was never an earbud or a headphones guy though, so this thread was interesting to see these numbers at least. :)

Found the information for SHURE's SE535: http://www.shure.com/americas/products/earphones-headphones/se-models/se535-sound-isolating-earphones   Sensitivity: 119 dB SPL/mW Freq. Range: 18Hz – 19kHz (Pretty much perfect)   I believe it's only 15 or 18kHz that most people can generally...