Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
The "wattage" doesn't matter as to how loud a speaker is at a given drive level. That is described by its "sensitivity" specification. However, the maximum output can be known by three values - max power, sensitivity and compression. At low frequencies, the limit is usually excursion and not thermal, but basically if you know the power limit and sensitivity of a speaker, you can know its maximum SPL.