SIMPLE QUESTION: Can a 10" woofer give me the same bass of a 15" one?

[murillollirum]

Originally Posted by Inductor

Try to beat this 10" and don't ask silly questions. (And) Prove it!
Note: this in someway relates to "what's the best loudspeaker driver" question that many ask... good question, there's always a better one/application.

hi Rui, excellent response for a 10 inch, the problem is the low 84.6dB... there is always a problem.

[tinitus]

Originally Posted by JMFahey

Just do the Math, it will clear many doubts.

I have...many times

Originally Posted by Inductor

Try to beat this 10" ....

surely, if it's 20hz you want ... hard to do with a PRO woofer

but -3db at 20hz ? ... I wouldn't
suggestion, better try -6db/25hz instead
closed box, ofcourse

[tinitus]

Originally Posted by murillollirum

hi Rui, excellent response for a 10 inch, the problem is the low 84.6dB... there is always a problem.

I think you can do that with a 90db SB Acoustics woofer
it will still be 85db at 25hz

[weltersys]

Originally Posted by murillollirum

hi Rui, excellent response for a 10 inch, the problem is the low 84.6dB... there is always a problem.

Hoffmann's Iron Law: Loud, Low or Small, pick two.
With power available (new) at less than 25 cents per watt, (compared with well over a dollar a watt when the dollar was worth more than double what it is today) low sensitivity is not much of a problem.
If you want high sensitivity at very low frequencies with small diameter cones, horn load them in a large enclosure.

[tinitus]

all in all, I think it will get too expencive

[norman bates]

Cal, nice picture

[Starre]

Is a big idiot better than a small one...

[tinitus]

you should be able to do better than that

[Inductor]

Originally Posted by murillollirum

hi Rui, excellent response for a 10 inch, the problem is the low 84.6dB... there is always a problem.

I'm not Rui, maybe you are confusing me with another member from same country (Portugal). He, he...

""Low 84.6dB"", as tinitus said, that's not bad (go read), and pay some attention to what he says and to the roll-off in the low frequencies in measurements and simulations of the big drivers like the 15's" and some of them you need to model them in the big theater/cinema boxes of 300L and plus that it's kind of awkward in your living room HT. Also notice that the Sub 12Pi by Wayne Parham, one of the best in the world has 2x12" and not a 15" or two (or a 18" for that matter).

Also in post #8 sreten put it in very simple terms and easy to understand.
You can not go low (infrasound) with a big driver but you can duplicate SPL (+3/+6dB) with double (10") drivers. You can also make isobarics and push-pulls or horns as was said before - ""horn load them in a large enclosure."", by weltersys on post #44.

And I don't take very serious (or lightly) what others say, that's their experience, just what you need, in your system and what your objectives are. Maybe we agree in something or everything but hey, I'm sorry, I just love to cheat on Hoffmann's Iron Law.

[tinitus]

'hybrid woofer system'
mating 20hz Fs hifi woofer with high SPL 98db PRO midwoofer
could look like this