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-   -   SIMPLE QUESTION: Can a 10" woofer give me the same bass of a 15" one? (http://www.diyaudio.com/forums/multi-way/229201-simple-question-can-10-woofer-give-me-same-bass-15-one.html)

murillollirum 2nd February 2013 04:22 PM

SIMPLE QUESTION: Can a 10" woofer give me the same bass of a 15" one?
 
Please be honest, can a 10 inch woofer offer the same impact of bass, I'm telling of the first octave 20-40Hz of a 15 inch?
I;m asking this because of the quote of a JBL guy, MArk Gunder: "to make sound, you must move air"

balerit 2nd February 2013 04:38 PM

No a 10 inch won't beat a 15 inch, Mark is quite correct

John Busch 2nd February 2013 04:39 PM

It depends....
 
All things equal the 15" will do a better job. The real question is application. There are modern 10" sub woofers with huge air moving abilities. They exist for those that have space and or cost limitations that make a 15" impractible.

However the 10" will have limitations and usually be less efficient.

You need to tell us more about what your goals and application situation.

balerit 2nd February 2013 04:44 PM

Quote:

Originally Posted by balerit (Post 3353076)
No a 10 inch won't beat a 15 inch, Mark is quite correct

If the cone area is doubled, the excursion is halved.

If the frequency is halved, the cone excursion increases by a factor of 4.

If the cone excursion is halved, the acoustical power is halved.

If the cone area is doubled and the cone excursion remains the same, the acoustical power is increased by a factor of four.

Cal Weldon 2nd February 2013 04:48 PM

Too vague of a question. It's like asking: can a truck go faster than a sportscar?

tinitus 2nd February 2013 05:37 PM

or you could also ask; 'at 70m/h, which car drives best?'

at lower SPL, I would say a 12" will do :D

tvrgeek 2nd February 2013 05:43 PM

On the other hand, 15's are harder to build to keep the cone behaving.
The simple answer which I am sure you have figured out by now is "It depends"

I'll take a pair of 12's over a single 15 unless I was building a PA system.

sreten 2nd February 2013 05:44 PM

Hi,

A really good 10" will slaughter a poor 15", it just needs around double
the xmax to do the job the same. Given your talking 20Hz to 40Hz, that
is possible in moderate volume with a lot of power with a 10". Generally
speaking a poor 15" will need a lot more box volume and less power.

However, if the 15" has about 4 times the cone mass of the 10" and
the same xmax, it will slaughter the 10", but will need a far bigger
magnet to do so, and will be commensurately much more expensive.

A good 15" will kill a good 10", depending on your design criteria.

Which it all boils down to, good design, and proper drivers for purpose.

rgds, sreten.

tinitus 2nd February 2013 05:46 PM

Quote:

Originally Posted by tvrgeek (Post 3353154)
I'll take a pair of 12's over a single 15 ...

then I would take it to 18" :D

sreten 2nd February 2013 06:21 PM

Hi,

The optimum size of a bass (sub) driver depends on understanding
the problem (the constraints - and there always are some), and
handling unrealistic expectations to properly define the constraints.

rgds, sreten.


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