would this be possible ? cone/former/dustcap triangulation ?

[9515ROB 10+ year member]

well after watching that vid you can see that it was the soft parts failing where they are glued together and not that the coil went thru the cone

 

[sundownz Pro Seller]

A Neo driver like that would rip through the cone and tear the dust cap right off with it -- there is ALOT of force behind a coil when it rips through the cone like that.

I saw the inside of an 18" cone get turned inside out in Beau's truck *laughs*

 

[sundownz Pro Seller]

Not that it is a bad idea -- extra strength is pretty much always good //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif But in those cases it would still fail more than likely.

 

[snoopdan 5,000+ posts]

Also, more joints = more failure points.

Here would be a good example of coil/joint fail.

 

[helotaxi 5,000+ posts]

Something will still be the weak link. All you can do is move the stress point around. Beef up one point and the next weak spot appears.

 

[SPLaudio 5,000+ posts]

looks like the tripple joint needs to built up. free air'in like that should have never came apart because there isnt much force on the cone. i have seen this happen many times in a wall.

by the looks of the vid the coil is still attached to the spiders so weak cone joint. applying a ample amount of epoxy ontop of the cone around the former ( go outward of the former 1-2" on the cone)is how i do it. ca glue should not be the only glue used on that joint...

 

[helotaxi 5,000+ posts]

As heavy as that cone is and with the amount of throw that sub has, the cornering forces are actually pretty substantial.

 

[brian84corvette 10+ year member]

all I wanted to do with this post is get some ideas going.

I do not own any neo subs - but more and more neo motors are being designed and built - and it looks like they can have some crazy motor force to them.

now ( as upposed to a fiew years ago ) extremely large amps are readily avalable for sale to any tom **** and harry that wants one

as the general thoughts are that we all need 3k+ on each subwoofer now to be loud

so we might as well take a fiew looks at how to streingthen up the products to help them last a bit longer.

i mean it is cool to get a psi recone on your sub because it blew - but id like my stuff to last as long as possible.

and I do believe if the right dust cap was used - it would / could help streingthen the cone to coil joint to prevent the coil from just ripping apart the glue joint at the cone.

in the video - it looks like they had a pressed paper cone attached - and the glue joint was still there. the actual paper cone just tore away from the glue joint that was still on the coil it self - so the glue joint was not a failure on that - the cone actually tore it self away... becuase it was only about a 3" circle supplying the entire force of the coils movment to the cone.... IF that sub had a strong dust cap bonded to the top ring of the coil and to the cone together - then that glue area should be about 5" or larger around and the 3" glue joint for the bottom of the cone would together apply a larger area of force to be applied to the cone from the coil it self vs just the 3" coil glue joint. - would the cone have ripped it self a 5.5" hole like it did in the video had the dust cap been designed like I have in the pictures ? possibly - yes it could - but I imagine the cone would be a bit harder to rip up that high in to it from coil force alone.

and to top it all off - the spiders / tinsel leads ext.. were still 100% functional on that sub - evidence as they kept plaing it past its failure rate - and it never did show any signs of smoking up or burning... the only thing wrong with that sub was the cone simply could not keep up with the coil.

 

[ciaonzo 5,000+ posts]

Isn't two or three of those slugs enough to saturate that amount of steel?

 

[Suicide Bobb 5,000+ posts]

Isn't two or three of those slugs enough to saturate that amount of steel?

That motor is beautiful...