which 8 to get

I have a 1998 dodge dakota extended cab and i am planning on gettin a custom box made for my center console. the most that can fit in there is two 8's. Im not sure wether to get to memphis mclass 8's which are 100rms a peice or 2 kicker compvr 8's with are 200rms a piece. If anybody has any recommendations on which one to get it would be greatly appreciated.

Are these the only brands you want or can use? I would highly recommend the Image Dynamics subs, they work great in fairly small enclosures. Probably sound better than the kickers, can't speak for the memphis.

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ya im open to any other subs,i can get the kickers for 100 bucks for both and 150 for both the memphis.

Out of the two the Memphis would sound better and the Kicker subs would be louder probbly.

RE 8s and Adire Audio Koda 8s are really good 8 inch subs also. Check Adire's website for box sizes for the Kodas.

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hey wrathchild, u might wanna check into the RE audio 8's, ive only heard good things about those. I have a pair of mclass's my self inside a custom center console box and am very happy with them. Also what brand of amp and wattage are you going for? If anyone else has any recomendations on an amp, if he buys the mclass 8's, just feel free to reply.
How many inches are available between both passenger and driver seats?

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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004

On another forum, a guy tested quite a few different 8" drivers from many different companies.  He borrowed a bunch of drivers from other forum members and, and posted the results.  Here's the link: https://forum.soundillusions.net/showthread.php?t=45731&highlight=challenge

Steven Kephart

Adire Audio

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I understand the obsession with SPL, but I simply don't share it.  What I'd want to see is linearity, impedence, accuracy and frequency response curves.

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Support the12volt.com

Me too, but as soon as I saw the pic of that guy holding the sub on his head........that thought went out the window!

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

What amp should wrathchild buy to perfectly accommodate his 2 8" mclass subs?

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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004

The MClass subs need a small vented enclosure and he should get the DVC 4 ohm models to obtain a 4 ohm load onto a 2 channel amp, bridged.  Wide selection of amps will do this job, like this MTX Thunder 282.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Not to be critical. But I'm going to be critical. That "test" of 8" drivers was fairly worthless, imo.

At BEST I think that test shows us that using THOSE EXACT BOXES, in THOSE EXACT CARS will yield ROUGHLY those results.

Nothing more.

Am I being unfair? I've never heard of anyone swapping drivers in and out of the same boxes for testing, testing using the same amount of power each time (what the hell is that supposed to show us?), and testing in car (ooh look, cabin gain).

That test probably does more harm than good, to all the viewers that think it actually means they should buy driver X over driver Y based on that.




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New Project: 2003 Pathfinder

and the sq test was a joke. i pity the people who let him use their drivers

No joke. "Here, run a worthless test on my drivers and push them to their limits while you're at it."

Don't tell me the other members of that board actually thought that was a worthwhile endeavor?

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New Project: 2003 Pathfinder

would wrathchild be better off going with a JBL300.1? instead of a 2 channel amp?

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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004

Lloyd is an SPL guy, but he is very experienced at it.  I agree that they should have used the same alignment for each driver instead of the same enclosure.  That would have provided a much more accurate test.  But I believe it will give the original poster an idea of what the differences between all the drivers are.    That's why I provided the link.  I wouldn't say it is totally useless.

Steven Kephart

Adire Audio

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I think the multiple errors in testing compound to a point approaching uselessness.  I really don't know what good anyone can possibly hope to extract from that page.  The only portion of the page marginally useful, in my opinion, was when they made comments about the physical features, i.e. the tinsel leads are too close together, etc. 

Steve, what can the original poster gain regarding the differences between the drivers when the measured differences are inherently flawed because of the ill-executed testing measures?  You see real testing being done all the time at Adire, I assume.  How does this test compare?

Furthermore, I can just see these guys sitting around doing the 'SQ' test.  The results are probably completely opposite of what people would generally consider good sound quality.  I can just picture it, "dude, Korn hit extra hard on those (high distortion) subs, they have eleeeeet 'attack'."  I wonder if they even tried to level out the SPL level (NOT WATT LEVEL) before doing the 'SQ' test.  Research has shown that our minds prefer higher SPL when comparing two drivers.  Were the tests even blind?  Ranking the drivers by SPL at a given watt level - good job guys, way to rank the drivers by efficiency.  Hell, they didn't even do that since they used different alignments.  What did they even show? 

Am I being unfair?  What _did_ they do right?

To give them some credit, I applaud their efforts to TRY to help the community.  Next time they should take an extra 10 minutes to think things through.

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New Project: 2003 Pathfinder

kfr01] wrote:

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p>Steve, what can the original poster gain regarding the differences between the drivers when the measured differences are inherently flawed because of the ill-executed testing measures?

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Well the build differences was one thing.  Even though the frequency response graphs aren't too accurate due to differing alignments.  It does give an idea of which driver has better low end extention, or which driver will have a really peaky response.  I think the enclosure chosen was probably a good size for the test as most of them probably are designed for a similar size enclosure.  I wouldn't be surprised if the response is accurate to within a few dB.  the differences in the response graphs between many of the drivers was much larger than that. 

Here's a link to the discussion thread about that test: https://forum.soundillusions.net/showthread.php?t=45741&highlight=great+challenge  Here's an excerpt from Lloyd about the testing:

"I'm not gonna sit here and argue that the boxes chosen were perfect for each driver... however the majority of woofers tested, did have reccomended volumes that we met...

its up to the person whose looking for an 8, or 8's... take the evidence presented, and figure out what's germane to your situation...

the only drivers that tested in a box too small, which should limit output... was the W7, and Mikes Custom TC woofer... and both presented very damn well IMO...

by no means is the test a final and conclusive "THIS WOOFER IS BETTER" but considering how limited 8" comparsions are... anything helps "

 

kfr01] wrote:

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You see real testing being done all the time at Adire, I assume.  How does this test compare? 

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Well not even close.  But then I wouldn't expect it to.  We have VERY expensive software and hardware designed for testing speakers.  But then it is much more important for us to have much tighter resolutions on our testing and be much more accurate.  To be honest, if they did have the equipment we have, I would be much more hessitant about their results.  This is because we find that people who try to use it don't know what they are doing and get inaccurate results or don't know how to read the results.  We had some people freak out on one forum because our Extremis driver had higher distortion than two other drivers at one frequency.  Of course they failed to notice that the distortion for all three drivers was well below 1% which is inaudible.  They also failed to see that we have much lower distortion numbers at levels where distortion does become audible. 

kfr01] wrote:

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Furthermore, I can just see these guys sitting around doing the 'SQ' test.  The results are probably completely opposite of what people would generally consider good sound quality.  I can just picture it, "dude, Korn hit extra hard on those (high distortion) subs, they have eleeeeet 'attack'." 

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Well if it helps, one of the guys who did the SQ testing was Nick Lemons, owner of Stereo Integrity (a small speaker manufacturer).  Also his dad installs pipe organs for one of the largest organ manufacturers.  He's a pretty good guy and seems to have a good ear.   

It's too bad our driver didn't make it to the SQ portion because I know it would have faired well.  But they greatly exceeded it's power handling on the SPL testing.  It only has a short coil, unlike all those SGLC drivers.

Steven Kephart

Adire Audio

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First, thanks for batting this around with me. I enjoy debate. :-)

I wonder if they re-attenuated the gain on the mains amplifier to match the varying less efficient subwoofers. Had they not done this I would throw the entire SQ test straight out the window.

About people figuring out the evidence: from the discussion regarding the test afterwards it is obvious there are many uninformed people -newbies- out there that might think this is some sort of determinative test - i.e. they think this _one piece_ of quite suspect evidence is _all_ the evidence. In my opinion the testers should have disclosed the shortcomings of their test more clearly.

But, once again, I do give them credit for trying. Please note, I'm not criticizing because it is fun - I'm criticizing to point out the limits of their test and hopefully encourage anyone attempting to conduct similar tests to either use tighter testing conditions or be more responsible with their disclosure.



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New Project: 2003 Pathfinder

i am looking into the IDv.3 sub that or either the memphis mclass. but now why would i want to run it at 4 ohms instead of 2 ohms.

Depends on whether you have a two-channel or a one-channel amp to power them.  Select subs that will wire to a total 4 ohms for the 2-channel (and bridge the channels).......to a total of 2 ohms for the 1-channel.  It comes out to 2 ohms/channel either way.  You'll find more of a selection in amps in that power output range with the 2-channels......like the MTX amp I linked to.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.