Brahma 15

Hi, guys today i've bought new brahma 15 so it goes to my suv, i want spl in this car with some sound quality but the guy from the local shop says that i made a mistake i shoudn't been buying brahma he says that image dynamics is better spl and sq sub, and it much cheaper than my brahma i'm confused now:errr:, do i need return this 15 guy cause really,  i do have sq car, so i want my suv be spl with some sq.

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Head Unit:Alpine CDA 9835
6.5 MB Quart Pce 210
Amp:JBL 80.4
Amp:JBL 1200.1
Sub:Adire Brahma 12 MKII

The guy from the local shop is just pissed you didn't give him the money.  Ignore him.  Instead learn an enclosure design program and estimate your results with both drivers. 

Actually, I just pulled up the IDMAX against a Brahma 15 in WinISD pro.

Brahma handles 1600w.  IDMAX handles 1000.  At these wattage ratings they produce very similar SPL levels through much of the bass frequencies.  However, the Brahma 15 gets much lower, rolls off slower, and stays cleaner. 

I'd keep the Brahma.

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New Project: 2003 Pathfinder

Yeah, anytime someone says something like that you have to ask yourself if they are trying to sell you something.  If they are, then ignore them.  Especially if they don't back up their claims with facts. I can provide some facts that will contradict that salesman's claims.

I also want to add that WinISD isn't very accurate.  Even their enclosure sizes can be off.  So I wouldn't trust it to show which is better.

Steven Kephart

Adire Audio

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Oh, I realize WinISD isn't always accurate. But I find it useful for broad approximations and comparisons.

Steven, do you know of a free package that is more accurate I can suggest folks here download? I feel that some sort of visual analysis tool can really help a lot of people here understand the concepts behind speakers, power, and overall system planning. It would be nice to have something to suggest and recommend as a learning and analysis tool.

Also, if you don't mind sharing, what about WinISD is inaccurate? Some of the data in the driver database, or some of the basic algorithms? If the basic algorithms, is the magnitude of error such that it may still be used as an approximation and comparison tool?

Anyone else feel free to chime in here too.

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New Project: 2003 Pathfinder

Actually for what you describe it should be just fine as a learning tool.  But just as long as people understand that the enclosure sizes, actual real world curves, and port lengths aren't right.  I just recently did a sub where WinISD said it's .707 enclosure was 2.95 cubic feet.  We then checked it in LspCAD and found out it was only 2.47 cubic feet for that alignment.  That is a decent amount to be off by.  And we have checked LspCAD many times and have found it to be highly accurate.  Although it is kind of pricey. 

I believe there is one free program that is more accurate, but I can't remember what it is.  I will find out tomorrow what it is and let you know.

Steven Kephart

Adire Audio

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I'll be looking for that too, Steven, because I use the WinISD mostly to help people out with enclosure sizes...not for business.

Steven can you give me the exact dimentions that will be perfect for this sub (i want to put it in a ported)

Thanks

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Head Unit:Alpine CDA 9835
6.5 MB Quart Pce 210
Amp:JBL 80.4
Amp:JBL 1200.1
Sub:Adire Brahma 12 MKII

It really depends on what you want out of it.  We provide a paper with several enclosure sizes for different results here: https://www.adireaudio.com/Files/cut%20sheets/Brahma%20Sales%20Brochure.pdf

Steven Kephart

Adire Audio

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