Brian-K-Owens
Stunt Coordinator
- Joined
- Feb 6, 2003
- Messages
- 194
The are theoretical questions. . I know the real world results can vary, but:
I see conflicting information on "double" loudness and power requirements.
Here is what I think to be true:
1 driver with X watts will give a certin SPL
2 drivers with the same X watts (each driver getting x/2 watts) will increase SPL 3 dB due to increased cone area.
2 drivers with 2X watt will increase SPL 6 dB. This tells me "double" loudness is +6 dB, since I have twice as many drivers (with equal output) as I started with.
So why do I see comments that say 10dB is "double" loudness. Did I miss something?
My next question is power requirements for a single driver. I am pretty sure you can prove that it takes 4X power to move a driver cone 2X excursion. In other words, feed a driver a 30 Hz sinewave with 10 watts, and the cone will move twice as far if you increase the power to 40 watts. So would moving the cone to 2X excursion be "double" loudness? once again, I hear the comment that it takes 10X power to double the loudness of a driver. Which is true?
Thanks!
Brian
I see conflicting information on "double" loudness and power requirements.
Here is what I think to be true:
1 driver with X watts will give a certin SPL
2 drivers with the same X watts (each driver getting x/2 watts) will increase SPL 3 dB due to increased cone area.
2 drivers with 2X watt will increase SPL 6 dB. This tells me "double" loudness is +6 dB, since I have twice as many drivers (with equal output) as I started with.
So why do I see comments that say 10dB is "double" loudness. Did I miss something?
My next question is power requirements for a single driver. I am pretty sure you can prove that it takes 4X power to move a driver cone 2X excursion. In other words, feed a driver a 30 Hz sinewave with 10 watts, and the cone will move twice as far if you increase the power to 40 watts. So would moving the cone to 2X excursion be "double" loudness? once again, I hear the comment that it takes 10X power to double the loudness of a driver. Which is true?
Thanks!
Brian