http://www.axiomaudio.com/dynamicheadroom.html

Top of the 4th paragraph.

In this artical Alan Loft states "Recall that 1 decibel (dB) represents the smallest detectable change in loudness, and that we subjectively perceive a 6-to-10-dB increase in loudness as sounding "twice as loud.""

For some reason 7db was stuck in my head. I probably should have used 8db as an average. This gives us 600 watts at 121 db. So it's 6 times the power for twice as loud. I did say this was very subjective.

paul

paul

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