Stereo Integrity 24" subwoofer - not kidding! - Page 29 - AVS Forum
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post #841 of 851 Old 07-19-2014, 11:52 AM
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"Curious....Why do bigger drivers excel at low frequencies as opposed to using the same amount of Vd in multiple smaller drivers?(LTD)

It would appear that in simulations there might be a very small advantage but when listing we tend to like the big drivers better. I know many that have said they love the FTW21's over other 18s for ULF. Then the SI 24 comes out and people are all saying the same thing."


if i had to take guess, it is probably because most folks just hook them up and play some tunes, make a comparison, and draw a conclusion.


the larger drivers have more sensitivity because they couple to air better and lower fs because they tend to have high mms (coil, cone, air load), together that gives them a different frequency response and subjectively 'more bass'. this then leads to comments like 'wow, driver really digs deep'. then by reverse logic, some folks might then look at the specs and conclude that the specs aren't telling the whole story because they aren't correlating to what was heard.


this is the problem that james (mk) was referring to, as he may have at a point long ago found himself in a similar situation.

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post #842 of 851 Old 07-19-2014, 12:57 PM
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?







looks like ronal murphy builds the same sub by hand right here in america too using parts of his very own creation!
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post #843 of 851 Old 07-19-2014, 05:32 PM
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Quote:
Originally Posted by LTD02 View Post
?


http://www.youtube.com/watch?v=eS6ddrkkA9Y





looks like ronal murphy builds the same sub by hand right here in america too using parts of his very own creation!
Did some reading on this. Seems like there are at least 3 mfgs who have used this basket/cone assembly, which is Chinese-built.
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post #844 of 851 Old 07-19-2014, 09:11 PM
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Did some reading on this. Seems like there are at least 3 mfgs who have used this basket/cone assembly, which is Chinese-built.
It's all catalog parts. Nothing of their own design except maybe the motor. No need for custom parts if they are readily available from a OEM.
I'd bet there are for more than 3 using the exact same parts. If it's one of the only baskets, cones and spiders available for HT 24's, you'd bet their are custom guys/companys making them all over.

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post #845 of 851 Old 07-20-2014, 01:45 AM
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N8 when are you and Mark building one?
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post #846 of 851 Old 07-20-2014, 07:14 AM
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Literally took 15 seconds to pull up a 24" basket on alibaba....

http://www.alibaba.com/product-detai...946402263.html

Beware, now everyone will be building them in their garage...

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post #847 of 851 Old 07-20-2014, 07:23 AM
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They have been there on that site for well over a year now. Someone asked before about building them and never did. SO I doubt anyone will be taking the challenge anytime soon. BUT there are a few car audio guys taking the plunge. Dont know why but what ever works.
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post #848 of 851 Old Yesterday, 10:18 AM
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If the concern is for a third party to test this driver why not just send the driver to Vance Dickason at Voice Coil Magazine and have him run the tests. He does this type of testing for more than 30 years. He also has a great deal of experience in system design and could offer some insight on this driver.
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post #849 of 851 Old Yesterday, 02:28 PM
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Originally Posted by chrapladm View Post
N8 when are you and Mark building one?
Looked into it already, there will be someone else coming out with a 24" fall/winter thats not Mark, Not 100% sure if it's coming to NA but I'd bet it will, shooting for 7CF enclosures as optimal. Big company, so expect the price to be under 800$. Other than that, I don't know any parameters but I have seen pics of the prototype and it hammering

Mark said he could help anyone interested get a batch of parts for under $600 to build them themselves but has no plans to offer them as of now. he's got other things in the cooker at the monent
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post #850 of 851 Old Yesterday, 08:47 PM
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It's all catalog parts. Nothing of their own design except maybe the motor. No need for custom parts if they are readily available from a OEM.
I'd bet there are for more than 3 using the exact same parts. If it's one of the only baskets, cones and spiders available for HT 24's, you'd bet their are custom guys/companys making them all over.
Saying "nothing of their own design except maybe the motor" is pretty vague and ostentatious. A quick look at the parameters on Tantic's site will reveal a toally different driver than our HS 24. We utilize a totally different motor, coil, and spider than the Tantric unit. Is their unit possibly louder at 65 Hz? Mabye. Is our driver louder and peform better over the entire bandwidth of a subwoofer? Yes. And all of our parts are custom tooled (motor, coil, spider, adapter - both hard and soft - etc)- no "nothing of their own design" like you stated. If you want to come out with your own 24" woofer I welcome you to the stage. After all, nothing is custom tooled according to you.

Your quoted comment is like saying that every vehicle that shares a similar wheel base is the same thing without looking at every other performance detail. Not every 12" woofer is the same. Not every 15" woofer is the same. Etc. Just because the size of the diaphragm is the same does not mean the performance is the same.
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post #851 of 851 Old Today, 04:12 AM
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Quote:
Originally Posted by Electrodynamic View Post
Saying "nothing of their own design except maybe the motor" is pretty vague and ostentatious. A quick look at the parameters on Tantic's site will reveal a toally different driver than our HS 24. We utilize a totally different motor, coil, and spider than the Tantric unit. Is their unit possibly louder at 65 Hz? Mabye. Is our driver louder and peform better over the entire bandwidth of a subwoofer? Yes. And all of our parts are custom tooled (motor, coil, spider, adapter - both hard and soft - etc)- no "nothing of their own design" like you stated. If you want to come out with your own 24" woofer I welcome you to the stage. After all, nothing is custom tooled according to you.

Your quoted comment is like saying that every vehicle that shares a similar wheel base is the same thing without looking at every other performance detail. Not every 12" woofer is the same. Not every 15" woofer is the same. Etc. Just because the size of the diaphragm is the same does not mean the performance is the same.
Was he referring to SI having nothing custom of Tantric? I could be wrong, but read it as the latter. Also, where on their site do you see T/S parameters?
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