What caused this?

[Clifff150 10+ year member]

Recently sold an old sub of mine and a couple days after install, this happened. Any guess as to what caused it? He had it on an Audio Legion 1600.1 and in an aero ported box around 1.3 cubes I believe. It’s a DC Audio Level 4 10.

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[TheRadio]

Looks like the coil jumped the gap and didn't reseat properly judging by the bump in the spider.

Someone was a little overzealous with the power.

Edit: DC recommends 1cf, so an extra 30% of volume would contribute to unloading before reaching the thermal limit, supporting the coil jumping the gap theory.

 

[winkychevelle 10+ year member]

Playing below tuning with to large of a box. A longer coil would fix that. The lvl4 was built to be a burp sub not really a daily sub. It models quite poorly for anything other than a burp box

 

[Clifff150 10+ year member]

This look crooked to anyone?

 

[winkychevelle 10+ year member]

This look crooked to anyone?
View attachment 44144

Damn yea I'd say the motor shifted. Was the box he used only single baffle? Single baffle flex can cause motor shift especially if he was getting the ferrite hot and the glue failed which judging from the jumped gap I'd say he was doing.

 

[Glen Livet]

Playing below tuning with to large of a box. A longer coil would fix that. The lvl4 was built to be a burp sub not really a daily sub. It models quite poorly for anything other than a burp box

ok. I gotta ask
What’s a “ burp box”?

 

[audiobaun 5,000+ posts]

LOL. Poor sub didnt have a chance. Over Powered that joker to Death

 

[audiobaun 5,000+ posts]

ok. I gotta ask
What’s a “ burp box”?

A severely Braced and double to tripple Layered Enclosure, usually Capped and or reinforced Ends

 

[Glen Livet]

A severely Braced and double to tripple Layered Enclosure, usually Capped and or reinforced Ends

Oh. So when the box belches. It belches everything out the sub woofer?

 

[winkychevelle 10+ year member]

Oh. So when the box belches. It belches everything out the sub woofer?

Lol it's a box designed to play a very narrow frequency range with the most efficiency and lowest box rise to maximize the power input. You pretty much only play test tones where the port is doing nearly all the work so mechanical power handling is pretty much maxed out and thermal limits are what stop you. But 30sec tones mean heat build up minimal at normal levels.

It just a competition box that is basically a 1 note wonder. They generally **** to listen to and are bad on the sub for daily use.

The DC lvl 4 subs peak high at tuning regardless of box size and tuning which is why they can rate the box size so low. It won't be musical no matter what you do

 

[Glen Livet]

Lol it's a box designed to play a very narrow frequency range with the most efficiency and lowest box rise to maximize the power input. You pretty much only play test tones where the port is doing nearly all the work so mechanical power handling is pretty much maxed out and thermal limits are what stop you. But 30sec tones mean heat build up minimal at normal levels.

It just a competition box that is basically a 1 note wonder. They generally **** to listen to and are bad on the sub for daily use.

The DC lvl 4 subs peak high at tuning regardless of box size and tuning which is why they can rate the box size so low. It won't be musical no matter what you do

so a box is like a dragster? Built for all out power over a short distance. All out power or blown engine.

 

[audiobaun 5,000+ posts]

so a box is like a dragster? Built for all out power over a short distance. All out power or blown engine.

Pretty much.. And generally Heavy as Fvk

 

[winkychevelle 10+ year member]

so a box is like a dragster? Built for all out power over a short distance. All out power or blown engine.

Decent analogy.

 

[Clifff150 10+ year member]

Yeah it is single baffle. I have no idea of any real specifics as it’s a guy a family member works with. Thank y’all for all of the input.

 

[Bobbytwonames 5,000+ posts]

This look crooked to anyone?
View attachment 44144

Looks good to me!