SPL (Sound Pressure Level) / Power Calculator           [pic]   [pic]
Select Speaker Sensitivity:    
Range from 70 to 120 dB (1W,1m):


 82 dB -> very low efficiency
 87 dB -> low efficiency
 92 dB -> medium efficiency
 97 dB -> high efficiency
102 dB -> professional speaker
Select desired SPL:
Range from 50 to 150 dB:


 80 dB -> noisy traffic
 90 dB -> heavy truck
100 dB -> loud rockmusic
110 dB -> very loud classical music
120 dB -> very loud rockmusic
130 dB -> Threshhold of pain
140 dB -> Jet taking off, 20 meters
Needed Amppower Watts:


+10 dB increase in SPL is supposed to be twice as loud.