Woofer Size Vs Spl

[stevh0]

Okay , i know pressure is pressure , but how does say 150 db's sound from 10's compared to 15's

what im trying to say is , although i dont have a one note wonder , actually really far from it , but i have just been put to shame by 1 12inch woofer . and im running 4 15's .

although when running music ill put him to shame 50 times over and im alot louder . how does this work?

LOUDNESS VS SPL ?

what im trying to understand or wonder is , would a car with 4 x12's vs 4 x 18s both doing exactly the same numbers , the one would obviously be louder . why ? is it the cone area?

confused , can somebody explain ?

[julz]

You have to control your elements. If the same vehicle had 4 18's and then 4 12's... If they were running on the same amount of power... It would be hard to compare apples to oranges, yea they're both fruits but of different sizes and quality.

[stevh0]

but was the 4 18s louder on music then the 12's?

[julz]

but was the 4 18s louder on music then the 12's?

It could be that the 18's due to their size may be moving so much air, and the 12's possibly given just enough power to be moving more air than the 18s.

[stevh0]

well theres a diff between 1 12 doing a 150 @ 60hz and 2 15s doing it at 40hz

[dleccord]

there are so many variations as to answering your question. yeah you will put the guy with 12s to shame because he is tuned so high but with the right song, he would be right there with you, that is if he can find music with high bass notes. it prolly sound like @ss but it will wang.

[Forevrbumpn]

think of it this way too, you may have 4 15s with a wide bandwidth, say 20-60hz pretty flat, so it sounds loud all the way around, that guy with the 12 has a much NARROWER bandwidth, so his freq is compressed to that one note wonder.

If you think of it as bandwidth, and compression of bandwidth its kinda like, "Oh, yeah, I see" If you tune that box right there at cabin tunning it will get loud, but if you double the octave, say go from 30hz to 60hz, the speaker cone is moveing twice as fast, and the resonance is more effective at the double cabin resonance, becasue the cabin is getting twice as much pressure going back and forth

( since the sound/pressure waves moves in waves, and bounce back and forth 60times a second, over 30 times a second- there is twice the air pressure) But again, sounds like ass

[Slinky]

its about tuning and shit. 4 18's could peak a lot louder than the 12's at lets say 30 hz cause of the air they can move. you would need to tune the 12's higher to try and get the same nmber.