SPL differences?

[Montana]

Hey guys, I'm fairly new and lack knowledge, so I'll just ask.

My question is how much on the meter are you losing by downing cone area?

assuming you had a box optimizing the performance of each sub.

A 8 inch vs a 10 inch vs a 12 inch

I am just looking for benchmark numbers, obviously nobody can give me exact numbers.

Input is greatly thanked.

Click to read more...

 

[Phoenix Risen 10+ year member]

this is way to vague.

 

[THATpurpleKUSH 5,000+ posts]

ASsuming the install is done properly, you gain 3db when you double the cone area.

There are too many variables to give a true answer to your question.

I forget the name of the guy, but there is someone out there that did something like 170db with a single 10.

 

[Montana]

Guys, I understand there are varibles out the as*, that's why I just a ball park guess, I am just curious if we are talking 10 Dbs, or tenths.

3Dbs off DOUBLE cone area?

Well then, if that is truthfully the case, that is all I needed to hear.

Anyone else agree that sounds about right?

 

[Chriszle 10+ year member]

3db is a general rule, but rarely is it actually accurate in the field. It depends on too many factors.

 

[Montana]

I'll take 3Db as a general rule and leave it at that, that's all I wanted.

A BALLPARK GUESS

As I mentioned in both post I've made on this already,

I already said I know nobody can give me a close guess, I just wanted a general idea, and seeing as I don't chase tenths, a 3db gap on splitting cone area in half is alright with me.

/closed

 

[THATpurpleKUSH 5,000+ posts]

There is more to spl than just cone area- motor force on the moving mass is also important to look at, as well as the impedance plot, among other things.

 

[murph 10+ year member]

Between the same subwoofer there will be a noticeable difference between each size. If you can fit each in the optimal box ofc the bigger woofer will be louder.

 

[Montana]

There is more to spl than just cone area- motor force on the moving mass is also important to look at, as well as the impedance plot, among other things.

I know, I just said SPL to get people to give out meter readings, as that is a solid number to run with other then "well its louder the bigger it is."

No sh*t, I just wanted to know how much it was. I'm done checking up on this thread so, so post away anyone if you want, I'm not reading em I got my general rule of thumb.

 

[FlexnInLa 10+ year member]

I know, I just said SPL to get people to give out meter readings, as that is a solid number to run with other then "well its louder the bigger it is."
No sh*t, I just wanted to know how much it was. I'm done checking up on this thread so, so post away anyone if you want, I'm not reading em I got my general rule of thumb.

He mad?

 

[TaylorFade 10+ year member]

If cone area is the only one of about a million variable that changes, then the general rule applies. Double cone area is a +3db gain.

So, with that said... an 8" is ~ 50sq in. A 10" is ~ 75 and a 12" is ~ 113.

An 8 to a 10 is a 50% increase in cone. That should net ~ 1.5db all else bein equal.

10 to 12 is another 50% increase. Another 1.5db.

So, an 8 to a 12 should be +3db.

 

[av83 10+ year member]

[quote name='Montana']A 8 inch vs a 10 inch vs a 12 inch
[/QUOTE]



[quote name='TaylorFade']

So, with that said... an 8" is ~ 50sq in. A 10" is ~ 75 and a 12" is ~ 113.

An 8 to a 10 is a 50% increase in cone. That should net ~ 1.5db all else bein equal.
10 to 12 is another 50% increase. Another 1.5db.
So, an 8 to a 12 should be +3db.[/QUOTE]

@Montana ;... you can learn a lot from some of these guys. To say ” I've learned enough, thanks anyway” is doing yourself a great disservice.

 

[Montana]

It wasn't that I didn't want to learn more, it was I saw where it was going after the first reply. "too many varibles" just over and over, nobody giving real help just free post dumping, annoying.

I did enjoy his little read he gave me however, good sh*t.

 

[TaylorFade 10+ year member]

I have actually tested a single 8, a single 10 and a single 12 in the same car and same amp and same load. BUT... the "boxes" were different and the subs were different.

But just for informational purposes...

8" - 150.3... Atomic Apocalypse 8 (5 gallon "bass bucket")

10" - 151.5... Cadence 10 (sw2?) (tube)

12 - 152.5... Tantric MD12 (burp box)

I have done 153.xx with a single Tantric HD 10, but it's a little unfair to compare it to the other subs since it's got more ass and was at .5 nominal.

So, you can see that even though they were very different boxes, all at the same nominal load and ~ the same power, the cone area really makes a difference.

 

[Bettr n' Revrse 5,000+ posts]

In a perfect world as much as 3db but thats rarely the case...