More cone - how much more SPL?
 

say someone has 2 10's.

but enough power to effectively run 4 10's.


then they add 4 more 10's, totaling 6.


if power stays the same, how much gain in SPL, theoretically, should a person expect?

would it be better to stay with 4 10's since that is the number of subs that can be adequetly powered? Or would having 6 slightly underpowered subs still be louder?

Theoretically given the same power with 2x cone area is supposedly 3 db gain. however with 3x the cone area one would assume a theoretical 4 db gain. however i think a 2 to 2.5 gain would be more realistic.

I just experienced this exact scenario last week.
Testing 1 sub then adding a second gained 5.2 dB then 2 subs up to 4 subs gained another 3.4 dB then 4 subs to 6 subs only gained 0.8 dB. At this point i am seriously under powering like 1200 watts per sub.

I know in extreme going from 18" sub to a 15" sub is only 0.2dB difference. The gain isnt in cone area but motor strength.

this is a odd question coming from you Iolui, you should know this stuff.

so you saying 4 10's is good enough.

I think if you ridin spinnas then you are golden!!!
What iam saying is i gained 0.8 from 4 to 6 subs.

well i do ride spinazzzz cuz my eyes like a chinese im drinkin on the heiny riddin down the strip any part at you can find me...

Yuli, I think we'll see a nice gain ;)

Yuli I have found it really depends on the vehicle and sub placement.

I have seen little to no gain to 5-6db gain

But since your doing it I say you see a big gain with your experience.

Garett

It is hard to say what the gain will be because of other variables. If you are going from 4 to 6 subs and you are able to give them the same power then I would predict up to a 2 db gain. But if you are adding 2 subs and not increasing power so that the 6 subs are getting the same individual power as the 4 were then the increase could be nullified because you are trading cone area for power.
If it is in your rex, you have to consider the change in flow and increase pull in power to get the amps to make full power and see a gain. But you are a smart guy Yuli, you will figure it out.

well i know space becomes the biggest issue and a proper box becomes the biggest factor.

so say someone goes from 2 subs to 4 subs. with enough power to push 4 subs. what is the theoretical gain there? 1.5 db's?