More Cone = More Sound ... But How Much More?
10-26-2009, 04:50 PM
#11
Yuli is always a fountain of spl knowledge 
I agree with the "conditions factor". One being power delivery and power production and it is a very important factor.
Yuli says he got more output out of three 10"s on less power. Actually, three 10's measure at 930 cm2, and two 12's are at 960 cms, so two 12's have more cone area. However, what may be happening is a perfect example of power compression and coupling effect. Three subs sharing the load vs two, so three will be more efficient in power compression factor. And three subs over two will have an approximate 1.5db gain in terms of coupling effect. So these may explain the output gains. Enclosure size is another factor, cause perhaps the 10's were "happier" in their designated boxes than the 12's in theirs. Like I said the list of conditions /factors/variables can go on all day. Also, I am refering mostly to "groundpounder" and SQ subs, SPL subs are completely different in design in terms of goals and application, but laws of physics still remain unchanged.
I agree with the "conditions factor". One being power delivery and power production and it is a very important factor.
Yuli says he got more output out of three 10"s on less power. Actually, three 10's measure at 930 cm2, and two 12's are at 960 cms, so two 12's have more cone area. However, what may be happening is a perfect example of power compression and coupling effect. Three subs sharing the load vs two, so three will be more efficient in power compression factor. And three subs over two will have an approximate 1.5db gain in terms of coupling effect. So these may explain the output gains. Enclosure size is another factor, cause perhaps the 10's were "happier" in their designated boxes than the 12's in theirs. Like I said the list of conditions /factors/variables can go on all day. Also, I am refering mostly to "groundpounder" and SQ subs, SPL subs are completely different in design in terms of goals and application, but laws of physics still remain unchanged.
Sasha, using the Pr^2 formula 3 10's have more cone than 2 12's. Try it
when done in inches anyways. I tired it in centimeters and I got something like 1452 cm^2 for a pair of 12's and like 1520 cm^2 for three 10 inch subs.
actually you'd need it to be about 10's.
Last edited by Father Yuli; 10-26-2009 at 04:57 PM.
10-26-2009, 04:56 PM
#12
However, as I'm sure Yuli is thinking of pure SPL numbers, I'm just thinking about pure daily pounding ... considering different setups and the pros and cons to them.
Thanks for the info Sasha
- point taken.
Last edited by DaVibe; 10-26-2009 at 05:00 PM.
10-26-2009, 04:58 PM
#13
50 Watt CAFz'r
Join Date: May 2007
Posts: 384
3Db is the smallest amount of volume that you can hear it's really not that much.In fact turning up the volume on your deck 1 click would likely be more than or equal to 3Db. Most of us are so def by now we can no longer hear that small of a change. 10Db is twice as loud as before eg. 130Db is twice as loud as 120.140 is twice as loud as 130 and 4 times louder than 120 and so on....
Generally speaking when some one is looking for louder they are looking in the 10 db range though. So if the o.p. is trying to get "louder" by simply adding a sub it isn't going to happen.
Generally speaking when some one is looking for louder they are looking in the 10 db range though. So if the o.p. is trying to get "louder" by simply adding a sub it isn't going to happen.
Last edited by godzilla1978; 10-26-2009 at 05:01 PM.
10-26-2009, 05:00 PM
#14
I could probably hear 1.5 db's in my own system ... but you're right, most people would talk about an audible difference ... personally, little bit of both ... both mic and audible.
However, as I'm sure Yuli is thinking of pure SPL numbers, I'm just thinking about pure daily pounding ... considering different setups and the pros and cons to them.
However, as I'm sure Yuli is thinking of pure SPL numbers, I'm just thinking about pure daily pounding ... considering different setups and the pros and cons to them.
how noticable the difference will be to a human ear will depend on tuning.
you will definately hear the difference between two set ups with same power but one having twice the cone area.
10-26-2009, 05:01 PM
#15
3Db is the smallest amount of volume that you can hear it's really not that much.10Db is twice as loud as before eg. 130Db is twice as loud as 120.140 is twice as loud as 130 and 4 times louder than 120 and so on....
Generally speaking when some one is looking for louder they are looking in the 10 db range though. So if the o.p. is trying to get "louder" by simply adding a sub it isn't going to happen.
Generally speaking when some one is looking for louder they are looking in the 10 db range though. So if the o.p. is trying to get "louder" by simply adding a sub it isn't going to happen.
Last edited by DaVibe; 10-26-2009 at 05:03 PM.
10-26-2009, 05:06 PM
#16
50 Watt CAFz'r
Join Date: May 2007
Posts: 384
Lol I'm just saying that most people underestimate how much they're going to have to do to get louder! Of course everybody's idea of louder is differen't, in my experience the best way of getting to where you want to be is careful planning,education, and a fat wallet!
10-26-2009, 05:13 PM
#17
Lol I'm just saying that most people underestimate how much they're going to have to do to get louder! Of course everybody's idea of louder is differen't, in my experience the best way of getting to where you want to be is careful planning,education, and a fat wallet!
Alot of interesting info.... 
