Entasi Audio ?

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

Sound Splinter - last I checked the T/S parameters hadn't been released. How can anyone consider a sub like that?

Entasi - heard these were just some guys getting a run of drivers made. But whatever, maybe they've decided to make a run of it. In any event, here's the T/S of the only woofer they make.

https://www.entasi-audio.com/listing.asp?id=2

Model it up. You do know how to do that, right? ;-)

IDMAX - heard it, like it, but probably bit of a step back from the Brahma.

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New Project: 2003 Pathfinder

Dude, the T/S parameters have been out for a while for the Sound Splinters at www.soundsplinter.com So do you think 3 12" IDMAX's would sound as good as 2 12" Brahmas, in both SPL and SQ?

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

Dude, you didn't answer my question.

Have you modeled any of these up yourself?

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New Project: 2003 Pathfinder

Model? Please do explain.

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

You take enclosure modeling software like WinISDpro or any other program with similar functions.

You input the necessary T/S parameters.

You pick box alignments that fit your car and goals.

You can compare multiple woofers in multiple enclosures.

....

i.e. you use software to come up with a model or estimate of what the resulting frequency response curve will look like.

These programs aren't perfect, and if you mess up the data input, they can be way off, but if you operate them with care and remember that they're a bit off you can conduct a MUCH more sophisticated analysis than browsing manufacturer websites.

Basically if you learn how to do this analysis you won't have to ask us what we think of every driver under the sun. ;-)


Note: Stevdart has had some excellent posts explaining WinISD to people. Run a search.

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New Project: 2003 Pathfinder

I use WinISD all the time and i already compared them. The IDMAX puts out higher SPL than any of the other ones, according to WinISD. The Brahma as the lowest frequency (25 Hz) at -3db, and the best response, but it doesn't get near as loud.

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

Ok. Sweet :-)

So, what are you thinking?

Do you think 3 subwoofers rather than 2 will be worth it for you?

What do you think the pros of the IDMAX are over the Brahma?

The cons?

In other words, talk through your analysis with us! It will help us know what you're thinking and what your goals are!

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New Project: 2003 Pathfinder

Well, i want loud as hell with extreme SQ. The IDMAX's get loud, very very very loud. The Entasi's get decently, but not really, and the brahmas get decent SPL ratings. The Brahma had the best SQ, behind it the IDMAX, and behind that the ENTASI. . . I need to get the most efficient that can take and utilized the most power equal to or greater than a 2 ohm load. 1600 WRMS @ 14.4 V is the amp i'm using (thats at 2 ohms, i don't wish to run at 1)

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

Yes, you have the right idea. Since 1600w is below the power handling capability of multiples of those woofers you'll want to increase efficiency.

What about Brahma 15s instead?

And really, I was serious about 2 RE 18"s in that other post. They seem perfect for your goals.

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New Project: 2003 Pathfinder

kfr, how do you justify using 18"s? aren't they a bit sloppy? sloppy like they don't really perfrom like 12"s, 10"s or 15"s?  Even with that power that he will be using, it seems a little strange?  

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Driver size or mass doesn't create "slop."

By slop you either mean:

1) Transient response is bad

2) Distortion is high

3) Cone breaks up early.

...

That larger sub-bass drivers can't "hit" like smaller drivers is a myth. I've heard people supporting this myth. Their reasoning is usually: "the larger driver has more area and mass to move, it must not be as fast."

Please read the Adire technical paper here: https://www.adireaudio.com/Files/TechPapers/WooferSpeed.pdf

I quote from the paper: "It turns out that transient response of a woofer is not a function of the moving mass, as is commonly espoused (one of the most infamous audio myths). In actuality, it is based upon the inductance of the driver. And the greater the inductance, the slower the driver - the lower the transient response."

Assuming inductance is sufficiently low as RE builds quality drivers, transient response won't be a problem.

Distortion? The XXX uses Adire's XBL^2 technology. I feel confident in saying that distortion is lower than many 12" drivers on the market.

Cone break up? If he has the crossover set at 80hz or below this won't be a problem.



So, where's the slop?

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New Project: 2003 Pathfinder

fair enough. I feel that is good response I am stisfied. But you obviously see where I come from on that question, because it doesn't really seem that too many 18" woofers are used in the car, especially for sq aplications. I also might inquire about the enclosure size for drivers this size. in home and pro audio apps. allow for much larger cabinets where as the car is slightly restricted.

So I might ask next though, is why do you want an extremely loud sq setup uthink? I wonder if you are genuinely wanting this just to feel better about something else?

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Yes, dwarren, you're right, 18" woofers are rarely practical for cars. I was suggesting a pair as an alternative to 3 12"s and know that uthink drives some sort of SUV, I assumed he had some space to play with. :-)

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New Project: 2003 Pathfinder

well I guess turning an suv into a sub enclosure is ok if you don't really use it any way...(s)tupid (u)seless (v)ehicle

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"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.

Uthink, what have you found out about the rl-p's? people in caraudio.com seem to love this sub. I'm somewhat in the same boat you are. i'm looking for a sql sub.