Check the link:
http://www.carsound.com/cgi-bin/ubbc...?ubb=get_topic;f=1;t=019193

I'll be driving down to N.C. on Monday. It was only planned in the past week. What a blast this should be.

 

JMAX,

This has nothing to do with this post (seeing how I am in southern Louisiana and all), but I wanted to ask you a couple questions if possible. First, I see you have "Tons'o'damping". Well, did you put anything ON your rear deck? If so, did you put anything on the bottom side, or the top side of the rear deck,,,OR both?? And what about those 2 lil bars that run across the trunk, did you do anything with them? Just a few simple questions, hope you don't mind sharing some info....

Thanks man,,,,,DMAN

 

The only comercial dampening material I think I like are the vinyl materials. The rest don't have the full range of good qualities. As anyone who has seen my car would say, Uh, what rear deck? And what trunk bars? The trunk bars were removed over 2 1/2 years ago and the center section of the rear deck cut out. I have wooden plates, one the baffle for a sub box and the other the roof of the sub box. The baffle piece is a perfect fit across the top of the rear deck. The top piece of the box is a perfect fit under the rear deck. Screws go through the bottom piece, through the rear deck frame and into the baffle. Sandwiching the baffle frame between two pieces of wood. There is a little bit of cascade VB material on the edges of the rear deck.

As for dampening most of what I have installed is in the doors. The doors open and close like a cadi. I've got some that I am going to remove sometime in the next 6 months and plan to replace with "different" materials. And the rest of the cor should also be finally layered or relayered in these other materials at that time. I need warm weather to do it. I don't have a garage large enough to open my doors. And transporting all the materials and tools needed to apply them to someplace where I could do the work would be a chore in itself.

 

so, What happened? didi he like the sub

 

I don't want to misquote so I will cut and paste instead.
http://www.carsound.com/ubb/ultimate...?ubb=get_topic;f=1;t=019193;p=8

RC's post:
"guys----i finally got in touch with Dan last night at 9:00--------i wanted to review my results and hear his comments before i posted my findings--------not that it would change anything but i always feel it is a fair thing to do rather than put someone on trial without hearing their comments---------and i realize that a test like this tends to create somewhat of a "trail" atmosphere-----i was especially concerned since it was clear to me that the conditions of the test didn't allow the Brahma to perform at its best------Dan seems to be both polite and knowledgable and i enjoyed the conversation------MY OBSERVATIONS------as i have stated already i believe that with an amp of less than about a killowatt that the brahma might output a little more sound (ie appear to be a little more efficient)-------but based on upper frequency distress tests (not affected so much by box size or car rattles)------the JL is clearly capable of more linear (read lower distortion) maximum movement------NOW before everyone jumps in and starts to spout DUMAX mumbers let me clarify a few things that i had not previously considered about DUMAX testing-------it is a remarkable machine and as a method of demonstrating MOTOR and SUSPENSION linearity it has no equal---------but the dumax measures the movement under static conditions and not when they are moving at a high rate of speed-----this means that any part of the suspension, spider, coil, or tinsel leads that causes secondary resonances, buzzing, rattles, pops or whatever you want to call them will not show up in the DUMAX linearity tests-----at least not the tests that plot displacement vs applied force-------based on the audible distortion threshold limits of the two speakers the JL exhibited inaudible distortion power handling at levels that were at or near the limits of the brahma when it was at or near its distress limits-----(i will have brain post the charts later in this thread---just remember to ignore the audible distortion curve on the brahma due to the distortions caused by the car))------it is a logical conclusion that the JL would easliy outperform the brahma at any frequency/power level that produces very high excursions-------REMEMBER that this is considering audible distortion and NOT raw SPL------the brahma is a very good speaker but the JL is simply incredible and thats all there is to it-------anyone want to come by and hear the JL being driven to ridiculous power levels and still remain free of distortion is certainly welcome--------the suspension in the 13w7 is amazing and at the present time unequalled by anything i have yet to measure or hear-------in car racing there is a saying "engines make you go fast but its tires that win races"-------i have a saying about speakers-------"magnets and voicecoils make speakers powerful but its suspensions that make them sound good".................RC

[ October 23, 2002, 03:09 PM: Message edited by: Richard Clark ]

we consider "physical stress limits" to be the point where any experienced speaker engineer, technician, or sensible audio person would consider that the speaker "has reached its limits" and would use good judgement and turn things down a little-------things like snapping, popping, rattling or just plain sounding like its gonna "blow"---------this threshold usually comes on very steep and has a clear threshold----------audible distortion limits is just what it sounds like-----we listen to the burst and when we just begin to hear the pure tone start to distort we call that the "audible distortion thershold"------and believe it or not with a little practice it is very repeatable from person to person--------if you have the ALMA CD and a really big amp give it a try-----or------if you ever visit i will demo it to you.........RC"

Basically he repeated his statement that he has never tested a better sounding speaker than the W7. But did not way anything bad about the Brahma, especially considering it's price point. Overall I was very impressed by how the Brahma did. Especially considering that it was installed by a normal guy, not a pro.

 

keep in mind that he was hitting the brahma with 32,000 watts! unfortunately, he never got to test the w7 at that much power...he only got to test it on 20,000 watts.

eric

 

Yes, and the box for the W7 was considerably smaller than the box for the Brahma. That makes more of a difference when you consider that the JL is designed for a larger box than the Brahma. But RC insisted that with the full 20k watts the JL was still clean. Slight distortion could be heard in the brahma at the step below 32k, but it was not "distressed" untill they went up to 32k. At lower frequencies the distortion came much more rapidly. The lowest frequency, about 31-33 hertz, distress was at 2500 watts. The JL could not be taken that low because of the small box.