That was a POS 1/4" lexan window....
Soundqubed/audioque hdc3.0 12s
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I'm you're huckleberry...
neo_styles
10+ year member
AKA Pop Twidget
This thread is seriously going to fvck up some noobs' basic understanding on sub stage output in CA.
Look, Mr. Notre Dame, your logic is flawed. Saying the lower volume of a car's interior space will cause less volume to be pressurized and therefore increase the sound pressure in that space is true, but what you're doing is jumping to conclusions and saying that AUTOMATICALLY means more flex, which is flat out wrong. Flex is the enemy in this scenario since all you're doing is acoustically exciting the metal in the car's body which will lead to cancelation and...LESS output. This is why you deaden. This is why you brace. It's not just for the car's protection.
So you're trying to tell me that if you had the same system in a '79 Celebrity Classic wagon and a Dodge Magnum (assuming volumes are equal), then the Magnum would be louder due to more flex? Think again.
Look, Mr. Notre Dame, your logic is flawed. Saying the lower volume of a car's interior space will cause less volume to be pressurized and therefore increase the sound pressure in that space is true, but what you're doing is jumping to conclusions and saying that AUTOMATICALLY means more flex, which is flat out wrong. Flex is the enemy in this scenario since all you're doing is acoustically exciting the metal in the car's body which will lead to cancelation and...LESS output. This is why you deaden. This is why you brace. It's not just for the car's protection.
So you're trying to tell me that if you had the same system in a '79 Celebrity Classic wagon and a Dodge Magnum (assuming volumes are equal), then the Magnum would be louder due to more flex? Think again.
PapaGeno21
10+ year member
Captain Questions
Resign from further use of your computer.
You have literally no idea what you are talking about.
Every post you make is just proving further and further how ignorant to the facts you really are.
He seems to be missing that flex is just the body panels moving due to bass, but since it's not aligned with the woofers, it's at least partially out of phase. I'm not an SPL guy, but I wouldn't be terribly suprised at all to hear that you can LOSE SPL by upping power this way. Lets say with 2000 watts you have almost no flex, body panels aren't moving. Suddenly when you go to 3k, the roof finally gives and begins to flex on your burp note. I'd imagine all that roof area out of phase with your sub would do more harm than the extra 1000 watts helped.
Lastly, again, low and flex don't have much correlation. I just finished a 10 cube box for a 21 tuned to 25hz in my caddy just to see how it would do, it's PR setup, so I can change tuning on the fly. The new caddy takes it like a champ. Sub up PR's back 25hz rattles very little in the car, other than being the resonant frequency on my seats themselves, you can feel them move up and forward abit when the bass hits. 20hz the doorpanels, the plastic part, starts "breathing" a bit. The loudest note in Put on to the ear anyways, is the LAST note, the very last one.. Seems like the car has some natural gain at 25, combined with my box having a pretty heavy peak between 20 and 28. ( need to go a hair smaller next time, but I prefer too big vs too small, I do have an EQ) Regardless, close the doors and I flex alot less than my neighbors RF punch 12's a sealed box in her trunk. Watch a youtube vid with both and I bet hers would LOOK louder/lower.
basswiigee
CarAudio.com Veteran
I totally agree with you, I KNOW flex is bad, but when you watch the videos it kinda gives you a idea of that subs output if you know all the factors, I AM BY NO WAY SAYS FLEX IS GOOD... just that flex came from the amount of pressure the more flex the more pressure.... but you do not lose spl because of flex, amd if you do i'm sure the amount is a db or less...
basswiigee
CarAudio.com Veteran
So you're trying to tell me that if you had the same system in a '79 Celebrity Classic wagon and a Dodge Magnum (assuming volumes are equal), then the Magnum would be louder due to more flex? Think again.
if they were equal they should have close to the same flex....
if they were equal they should have close to the same flex....
basswiigee
CarAudio.com Veteran
who me? or him? lol bro, i'm a troll target I swear...
neo_styles
10+ year member
AKA Pop Twidget
Sometimes it's that minor, sometimes it's not. Just keep in mind that flex you're seeing in those videos isn't telling you everything. It comes down to the resonant frequency of whatever panels are doing that flex. You can't always tell how low it will dig or even (honestly) what kind of output you can expect and this is why I'm never a fan of using user videos as an indication of how well a sub stage performs. There's too many other factors, your car being one of them. Add in to that equation the use of CLD on those panels, thus lowering the resonant frequency, and you'll end up with too many variables to say flex is the key indicator.
And then there's the camera and housing used for that camera. a GoPro isn't going to be as vulnerable to distortion caused by LFE as a generic Point-and-shoot camera will...
The reason I use the Celebrity vs Magnum debate is because of the thicknesses and types of metal used as well as the different methods of bracing and addition of structural rigidity. That solid sheet metal on a Celebrity requires more force and a different resonant frequency in comparison to the aluminum used on most of the newer cars with the goal in mind to have lower overall weight and better fuel economy. 1/8" aluminum doesn't require as much energy to excite as 1/8" steel, which is why you're going to see the aluminum flex more on the same power and output frequency.
In other words, a well-designed or well-deadened vehicle is going to require far more energy to cause flex than one with less structural rigidity or amount of deadening applied.
TaylorFade
10+ year member
I fail.
Laugh my fucking ass off.
That is the level of retardation in this thread. Abbreviating it just wouldn't express my disbelief.
And just as an aside... the roof of cars with sunroofs are generally much better braced/sturdy than those without due to the framework of the assembly.
That is the level of retardation in this thread. Abbreviating it just wouldn't express my disbelief.
And just as an aside... the roof of cars with sunroofs are generally much better braced/sturdy than those without due to the framework of the assembly.
basswiigee
CarAudio.com Veteran
sound waves are visible if they have something to move....
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CDAQtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DN8q4xAL2WpU&ei=xrscUvCvAqTqyQGcioCYBw&usg=AFQjCNE3HOG_1TL9rB6puTk0CM_v5plDEA&bvm=bv.51156542,d.aWc
basswiigee
CarAudio.com Veteran
agreed, but i wasn't trying to get all scientific, the medium(car) was still mimicing(flex) the waves...
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