Too much bass, body flex and rear door vibration. Help

[Concept]

I expected some body flex/vibration because I had to double layer my entire an of my truck to get it to stop, but this is ridiculous. Anybody have any cheap ideas to stop the back door especially from vibrating so loud, especially the rear window. I'm too worried to really crank it, last time I did my mirror fell off the window

 

[NathanJax]

with those speakers pointing directly at the rear window, there's not much you can do to stop the rattle

the normal stuff (dynamat, etc.) stopped my vibrations on the lift gate and on the sides.

 

[08grey]

Take a video of it vibrating. Watch the video in slow motion on your whatever. A good quality camera will catch it best. It will show you what the glass is actually doing.

 

[BEEMDUB]

Bro you aren't ever going to completely rid vibrations, thats what you're going to get when you have 4 12's pointed directly at the rear hatch lol...I wouldn't be so worried so much about vibrations and flexing as I would ruining seals or small parts on the rear hatch...Dynamat that rear hatch as much as possible and you can reduce it...but not eliminate it

 

[Concept]

Did you guys use a butyl- based deadener, or a mass-loader style deadener?
Orientation of the subs shouldn't make that much if a difference really I would imagine, since the port is pointed forward.

My truck was an extended cab, the caddy has noticeably more cabin-gain so its affected by vibration more I think. I'm no expert, everything I've learned is mostly trial and error, but the cones pushing out wouldn't displace that much air on the door side since there is so resistance to the pressure since the air is free flowing in the cabin.. Where in the box it's restricted, so having the ports pointed at windows would be far worse then having the subs pointed. Unless I'm wrong?

 

[EMF Audio]

I would take that box out and redo it entirely differently. It would also sound much better and louder doing it another way. The only thing that will help the scenario you have now is reinforcing the hatch with steel plate, and that will only do so much.

It would have less pressure back there with subs forward and port back. I also wouldn't have that box NEARLY that tall. I wouldn't go much above the seat back.

 

[BakermanINC]

Subs up, port rear. That will solve your issues my friend.

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[EMF Audio]

Subs up, port rear. That will solve your issues my friend.

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May not solve it, certainly help it. Definitely gotta get those subs away from the roof too.

 

[BEEMDUB]

Subs up, port rear. That will solve your issues my friend.

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lmao I hope this is a sarcastic joke

 

[BakermanINC]

lmao I hope this is a sarcastic joke

A joke? No...subs up, port rear. Best setup in ANY SUV or hatch.

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[EMF Audio]

A joke? No...subs up, port rear. Best setup in ANY SUV or hatch.

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Its true. I also can't stress enough on not having the subs that high too.

 

[BakermanINC]

Its true. I also can't stress enough on not having the subs that high too.

Some people just prefer cosmetic over functionality. I will never understand why.

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[EMF Audio]

Some people just prefer cosmetic over functionality. I will never understand why.

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To each his own, but cosmetically I don't feel that's the best option either. I'm more of a make it function well, THEN make it pretty kind of guy myself. I did it with 12 8's in an extended cab below the window, it can be done with that setup.

 

[Young28]

i gave up trying to get my rear view mirror to stick.

 

[Concept]

Subs are so high because they are actually sitting on top of the seats, this is due to me moving in a month, didn't want to take the seats out then pay to move them, once I get in the new house the seats will be removed and the subs will be on the floor like they are supposed to be. Interesting about sub direction though, thought port direction was what mattered. Anyways thanks for the advice all, and yea the mirror is going to be a pain, so much weight on that small area of contact haha

 

[Young28]

yea i had a new windshield in and told the guy to make sure it stuck good..well i let it set up and dry for a couple of days before i turned up the system...wasnt to long after it fell again. I said to hell with it lol.

 

[EMF Audio]

Subs are so high because they are actually sitting on top of the seats, this is due to me moving in a month, didn't want to take the seats out then pay to move them, once I get in the new house the seats will be removed and the subs will be on the floor like they are supposed to be. Interesting about sub direction though, thought port direction was what mattered. Anyways thanks for the advice all, and yea the mirror is going to be a pain, so much weight on that small area of contact haha

Both play a roll in position, but currently your setup for the worst possible scenario. All your pressure doesn't come from the port unless it's a bandpass. Additionally you're back wave is out of phase from your front wave. There may be an echo you don't realize you have till you fix it.

 

[08grey]

take the video..... play it slow and it will show you the actual movement causing the vibration.... you will be surprise how much give is actually in a piece of glass and sheet metal.... this will give you and idea of what steps may be possible next. no matter where the subs are located this would be one of the steps i take.

 

[LoHoe]

I have a box in my 07 Tahoe. The subs are inverted facing up and the port to the back.

 

[09Hoe]

I actually have my subs facing up, subs and port both 15's should that be alright? I was considering just flipping it and face them forward.