Sub sounds like its rattling or burping? (Video)

[REDz28 10+ year member]

Ok so I just got my sub in its a DVC 4ohm wired down to 2ohms it's running like 600 something RMS it's bass isn't as clean as I'd like it to be it doesn't have that hard hitting thump it's got more a rattle or burst it was described as a burp noise if that helps here's a video to help if you can guide me to the problem so I can fix it I'd really appreciate it. I'm not good with car audio at all sorry if I'm noobish

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[mylows10 5,000+ posts]

sounds like the box is too big and the port is too small

 

[REDz28 10+ year member]

Ok thank you yea I'm sure it is... Found out I **** at carpentry

 

[Kangaroux 5,000+ posts]

Post up your box specs so we can check em out. It sounds like it's coming from the sub not the box itself. When you aren't playing music, press STRAIGHT down onto the dustcap (the center of the sub). If you hear a scratching noise when you press STRAIGHT down, then your sub may be blown. Do you have a digital multimeter?

 

[murph 10+ year member]

Post up your box specs so we can check em out. It sounds like it's coming from the sub not the box itself. When you aren't playing music, press STRAIGHT down onto the dustcap (the center of the sub). If you hear a scratching noise when you press STRAIGHT down, then your sub may be blown. Do you have a digital multimeter?

x2 sounds like you have coil rub

 

[REDz28 10+ year member]

Pushed down on the sub dead silent. Pushed as far down as I could with out feeling like I was going to break it. And I don't have a digital multi meter I have one with a needle though.

Specs of box are 36" x 16.5" x 11" with a 2.75" in width port that's 15" tall. The length of the port is 25"

 

[mylows10 5,000+ posts]

Need the dmm to check coils. Still think its the box

 

[REDz28 10+ year member]

Zero way I can have it tested with one that has a needle? I have all the settings a normal digital one would have I'm throwing togther a 2cubic foot sealed box to test if it is my port/ box size

 

[TheUnderFighter 10+ year member]

It'd be cheaper to buy a DMM than it would be to make a new box. And the DMM is a life-long tool. They're like 10 or 20 bucks.

 

[mylows10 5,000+ posts]

It'd be cheaper to buy a DMM than it would be to make a new box. And the DMM is a life-long tool. They're like 10 or 20 bucks.

This. Measurements of your box and what sub. Brand and size will help

 

[REDz28 10+ year member]

All that information has been given. It's an American Bass VFL extreme 12" DVC 4ohm sub

 

[audiobaun 5,000+ posts]

that sub kinda sounds like it may be wired wrong to me...it could be the port also too big/not deep enough? buy hey..you should see some of my wood work! my saws stay put up these days..lol...check your wiring again,and the amp settings(lpf,not hpf) also.doesnt take much pull that sub out check wiring once more to be sure..make sure there is no air gap where sub is screwed down...that sub even with 100 watts bridged/mono should hit.just another suggestion to you.

 

[audiobaun 5,000+ posts]

Pushed down on the sub dead silent. Pushed as far down as I could with out feeling like I was going to break it. And I don't have a digital multi meter I have one with a needle though.
Specs of box are 36" x 16.5" x 11" with a 2.75" in width port that's 15" tall. The length of the port is 25"

you are around 2.65 cuft? some where in there..didnt take out for the port,but,box may be just a little big..have to look up your recommendations for the sub enclosure requirements, but 1.8-2.4cuft,seems to be ideal for a 12

 

[REDz28 10+ year member]

Last time I talked to bob at american bass he said 2.5 and tuned to 36hz was ideal I tried haha. I have it wired negative to negative terminal then to the negative port on my amp same for positive if I'm correct this is 4ohm to 2ohm

 

[REDz28 10+ year member]

Here's a little information that I forgot to include my subs left side negative terminal broke off. I ha to solder the thin silver fiber like wiring that connect the sub to the + and - terminals to a gold connection that I got from a subwoofer parts store online I had no problems with this and was able to repair the broken terminal fairly easily so I didn't really think of that. Could this be the problem?