SIMPLE QUESTION: Can a 10" woofer give me the same bass of a 15" one? - Page 5 - diyAudio
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Old 3rd February 2013, 04:50 PM   #41
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Quote:
Originally Posted by Inductor View Post
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.
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Old 3rd February 2013, 07:01 PM   #42
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by JMFahey View Post
Just do the Math, it will clear many doubts.
I have...many times

Quote:
Originally Posted by Inductor View Post
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
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Old 3rd February 2013, 07:16 PM   #43
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by murillollirum View Post
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
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Old 3rd February 2013, 07:20 PM   #44
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Quote:
Originally Posted by murillollirum View Post
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.
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Old 3rd February 2013, 07:56 PM   #45
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all in all, I think it will get too expencive
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Old 3rd February 2013, 08:05 PM   #46
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Cal, nice picture
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Old 3rd February 2013, 08:51 PM   #47
Starre is offline Starre  Sweden
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Is a big idiot better than a small one...
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Old 3rd February 2013, 09:13 PM   #48
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you should be able to do better than that
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Old 4th February 2013, 12:17 AM   #49
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Quote:
Originally Posted by murillollirum View Post
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.
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Old 4th February 2013, 07:08 AM   #50
tinitus is offline tinitus  Europe
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'hybrid woofer system'
mating 20hz Fs hifi woofer with high SPL 98db PRO midwoofer
could look like this
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