Originally Posted by B-string
Basically a question so general it can only lead to many pages of facts/garbage and ending in Mod lock?
But i tried to answer it in a general sense as well and close to real world answer.
such as the difference between a 100 watt 15 and a 150 watt 12"
yes very hard to answer because there is so many other things that would have to be included to answer that.
and for the most part I dont know if there is such a thing
a 15 that could handle 100 watts and a 12" that could handle 150watts would almost get you to the same place.
Knowing that most 15's have more sensitivity it would only take 100watts to reach the same level as a 12inch with a 150watts.
those are typical numbers for 3 to 4mm drivers but for a 12inch to beat the 15" it would be a huge jump in power rating and xmax.
so yes a 12" could get louder but because of the low sensitivity of higher xmax speakers, you would have to double the power
not just a extra 50 watts. Even with say a 5 to 7mm xmax speaker with a 450 watt rating comparing a "450 watt" 12" to a "400watt" 15" most likely the larger diameter speaker is still gonna have more sensitivity
but to clue him in on something more realistic in the real world in the mid to low budget range when comparing a 12 to 15inch
drivers in the 3 to 4mm range. the 15" is gonna be louder.
and power handling will be in the 100 to 150 watt range before 10% distortion.
Otherwise no a 12inch could get louder than 15" but the power range would be much different than 50watts and depends on sensitivity. It would usually take much more power than a extra 50watts to get "louder"