Are larger diameter speakers a little louder?

[Willabe]

Given all things the same, brand, power handling, sensitivity, cone, etc. is a 12" speaker a db or 2 louder than a 10" speaker?

If so it would be because it pushes a little more air?

     Thanks,  Willabe

[pdf64]

Yes, that seems to be the way it works.
It probably something along the lines of ‘larger cone area provides improved acoustic coupling’.

[Willabe]

Sorry for taking so long to respond.

That's what I was thinking. Thank you pdf64.   

[Lectroid]

I just did some sophomore math and is this right?  "A = Pi x diameter" says that two 10" speakers have more pushing area than a 15" or even an 18" speaker?

Sanity check, anybody?

[Keppy]

That's the formula for circumference. Area is pi x radius(squared).


So a 10" speaker is 100pi squinches.
2 of 'em is 200pi.
A 15" is 225pi.

[Lectroid]

Keppy,

Thank you.    It looked way off to me.  I need to brush up on math.

[GAStan]

That's the formula for circumference. Area is pi x radius(squared).


So a 10" speaker is 100pi squinches.
2 of 'em is 200pi.
A 15" is 225pi.

A 10" speaker is 10" DIAMETER.  The formula is pi x RADIUS squared.

[acheld]

Speaker areas:

8"   -- 50 sq in
10" -- 79 sq in
12" -- 113 sq in

But I believe speaker area calculated like this is not accurate due to limited cone movement around the perimeter.  Suspect this is well understood by speaker engineers . . . 

My own experience is that two 10" speakers are about as loud as a 12" speaker with the same power and roughly the same efficiency ratings. 

They don't sound the same to me -- I really like two 10" speakers with some of my amps, but others do well with a single 12 (all Celestion Gold speakers).   Couldn't begin to understand why . . .

[shooter]

Suspect this is well understood by speaker engineers . . .

an their formulas are crazy
I always liked motive force, sounds like a mad max throw-away line 

[Keppy]

That's the formula for circumference. Area is pi x radius(squared).


So a 10" speaker is 100pi squinches.
2 of 'em is 200pi.
A 15" is 225pi.

A 10" speaker is 10" DIAMETER.  The formula is pi x RADIUS squared.

D'oh! You're right. The ratios between speaker sizes work out the same, but my numbers were wrong.