Originally Posted by Crewwzin

My personal experience with the W7 is limited, but what I have seen...wasnt impressed. A friend of mine in my car club had an extended cab Ranger with 4 W7 12"s and 2 1000/1's. His box was a quad chambered 8ft3 vented box tuned at 42 hz (what the shop had determined was the resonant frequency for his truck). I had an extended cab Dakota with 1 Memphis MOJO 12" in a single chambered 4ft3 box tuned at somewhere around 50 Hz (a box we had laying around the shop from a previous SPL install) and 1 Memphis 1000d. He went first in the stereo lanes. All was good...he hit 148.3. I went next and burped it one time layin down a 150.4. Needless to say, he was pissed. The very next day he was back at his shop tearing every bit of the JL stuff out. Now, I know Low is gonna pop in and say "Those probably werent TL mics" and they werent, but the two trucks were run on the same mic one right after another.

My opinion? I have heard a couple of JL demo vehicles with W7's and they were okay. I'm sure if my friends was installed differently, he would have blown me out of the water. Which goes back to my original point...its not what you have, but how you have it installed.

Originally Posted by Crewwzin

Sorry, but its not what you have, its how you set it up. If someone cant hit 160 with 4 18's, its not installed right. Some of the top record holders are hitting 175+ with 2 15's. I used to hit 150 with 1 12" in a non-SPL daily driver. The advances in box designs and equipment has got people pullin insane numbers with not a lot of gear. Dont be so quick to count out a pair of 8"s.

Originally Posted by abervintageman4

yes i understand that and i guess with the best subs jbl has in one of the worlds most power efficient boxes than i might be able to understand but jbl's most powerful sub handles 800 watts rms, so lets say he was for some reason putting this much power into each of his 8" subs and had an extremely efficient box, i still cant believe that he did 160+db's unless i see some proof, and i dont know if you have heard of steve meade or not but he is pushing 4 18" fi audio btl's putting somewhere around 4000 rms to each sub in this box http://www.stevemeadedesigns.com/boa...?showtopic=144 and he hits 157.3 db's, i understand that its not a wall set up but even if 2 8" jbls were in a wall i cant see them getting over 160 unless i see some proof

Originally Posted by abervintageman4

yeah, i understand that some cars react better with an aftermarket stereos than others but lets say that he installed this setup in a crx and had lets say 800rms to each 8" sub in a ported box tuned to around 35hz or so and with the bass reflecting off the windows i can see the subs getting extremely loud but during competitions where do they mount the mics? wouldnt mounting them in the same place on different cars yield much different results? i guess after seeing post comments on youtube of them claiming to have 18 jackhammers and rediculous crap like that you become a little skeptical

Originally Posted by styxnpicks

you all fail to realize that 2 8's hitting a 160 legal IS possible, but that setup is going to be built to do one thing, play one note realy loud. steve meades setup is NOT an spl setup, its loud but the box alignment is more for music than spl burps

and lollerskates at the failed cone math

4 8's usually have a slight edge in cone area over a single 15, excursion might be limited tho

Originally Posted by Mr. eXtreme

OK so the volume of air your pushing is GREATER!! With 4 8's VS 1 12...

4-8's isnt 32" of cone area... and 1 12 isnt 12" of cone area ...How do you fiqure that??

4x8=32 & 12x1=12

Originally Posted by energizedsbs

well i was about to break out my basic math out on you but crewwzin did it for me... do some research next time...

and crewwzin what was this about????

And, no energized, I wasnt joking at all. You are more than welcome to do some research and you will find that I am, after all, correct.

Originally Posted by abervintageman4

160+ db's? okay i can see 140+ with an extremely good box but 160 is a little over the top, steve meade doesnt even hit that with 4 18's

Originally Posted by Low_e_Red

Steve Meade didnt build a 4th order bandpass with a .7 S-Curve meant to hit one note. And I had a JBL BTX500.1 pushing those GTO's. (Thats one of the CROWNs)

That was box (held together with brads and Pooky...lol)

Originally Posted by Bartak1

Originally Posted by abervintageman4

touche salesmen touche

Originally Posted by Mr. eXtreme

HERE READ:

W7 Subwoofer Drivers
The W7 embodies JL Audio’s commitment to pushing the envelope of speaker technology, with six patented technologies and a completely unique set of component parts. Each W7 model has been meticulously engineered to reproduce sub-bass with extreme fidelity at any volume level.

At first glance, you may only see a rather massive woofer, but as you begin to analyze the technology and the performance envelope of a W7, you will realize that they are much more than just another big SPL speaker. For us, designing a pure SPL speaker, with no regard to sound quality, would have presented a far lesser challenge than the one we chose to undertake with the W7 project. The goal was to design subwoofer drivers that deliver immense output with an extremely high level of fidelity.
It wouldn’t be enough for the speaker to sound great or be loud, it had to do both. This goal required us to develop a deeper understanding of the inner behavior of speakers, new and proprietary modeling systems and six new, patented or patent-pending technologies. We could have made a good-sounding, big speaker without going through any of this effort, but we chose to stretch our limits and devote the time and resources necessary to create a real breakthrough.

If that's not enuff here is the link...
http://mobile.jlaudio.com/products_subs.php?series_id=1

As far as worth the money you get what you pay for!!
Better sub for less not in my opinion...
Alpine Type X ...crap, Type R's Great but not better!
Audiobahns
In my peronal truck I paid for A Stealth Box with a 10w3v3 and 500/1
Always check your ammo before entering the battle!