Infinity help

[Lookin2GoFA$T]

So the story goes...I have a pair of subs sitting on my closet floor, and a coathanger flips off the bar and hits the plastic cone. Perfect hit! It cracked the cone; is there anything i can do to fix? i don't want to buy another one, this one is otherwise brand new. Any reasonable fixes? Its prolly scrapped. thanks.

[Notladstyle]

So the story goes...I have a pair of subs sitting on my closet floor, and a coathanger flips off the bar and hits the plastic cone. Perfect hit! It cracked the cone; is there anything i can do to fix? i don't want to buy another one, this one is otherwise brand new. Any reasonable fixes? Its prolly scrapped. thanks.

go to walmart and buy a can of resin and some 50cent brushes.

grab a 7-11 slushy cup

drink slushy

fill the cup about 1/4 full and mix the resin hot(as in use twice as much hardener as the instructions say)

You should have around 10 minutes before it gets tacky. coat the cone area and make sure the cone is aligned properly, wait for it to dry.

Coat it again. till you are satisfied with the layering - coat the ENTIRE cone EVENLY!

You will lose a decent amount of sensitity and it will totally rearrange the t/s specs but I repaired an older paper cone audiobahn like this and it actually sounded better afterwards.

[Lookin2GoFA$T]

are you serious; like have you tried this? over hardened resin might crack under the lateralvibration of the cone almost immediately. i was thinking maybe something that provided a little flex, but still bonded.

[Notladstyle]

are you serious; like have you tried this? over hardened resin might crack under the lateralvibration of the cone almost immediately. i was thinking maybe something that provided a little flex, but still bonded.


worked fine on a paper cone - I dont see why a polypropelyne cone would be any different. The cone itself isnt supposed to flex anyways. so re-enforcing it should do nothing but make it stronger.

[TJElite]

worked fine on a paper cone - I dont see why a polypropelyne cone would be any different. The cone itself isnt supposed to flex anyways. so re-enforcing it should do nothing but make it stronger.

First off, almost nothing sticks to polypropelyne.Your papaer cone absorbed the resin. Second, the MEKP in resin sometimes messes with plastic.

I'd try GOOP, if I were you. Same walmart, different isle. Goop sticks to PP better than just about anything. It also stays flexible, so it won't crack under bass. Still will mess with the TS parameters, but should work ok.

Toby

[Notladstyle]

First off, almost nothing sticks to polypropelyne.Your papaer cone absorbed the resin. Second, the MEKP in resin sometimes messes with plastic.

I'd try GOOP, if I were you. Same walmart, different isle. Goop sticks to PP better than just about anything. It also stays flexible, so it won't crack under bass. Still will mess with the TS parameters, but should work ok.

Toby

Unless its even spaced evenly it will pull the coil unevenly on the pole and since infinities do not have an aluminum wrapping the coil piece is every susceptible to flex

Resin will stick to polypropylene pretty tight it will(as with anything its bonded to) bond to itself even tighter so if it was applied to just one spot it could be broken off but if hte entire cone is coated it wont shatter or break. Even if it was a poor bonding, it only need sufficient hold to maintain the shape and air tightness of the cone. It can also be easily be applied evenly throughout the cone surface.

[GradeA_TireFryer]

duck tape!!!!!!!!! - sound just fine on your close floor

[TJElite]

Unless its even spaced evenly it will pull the coil unevenly on the pole and since infinities do not have an aluminum wrapping the coil piece is every susceptible to flex

Resin will stick to polypropylene pretty tight it will(as with anything its bonded to) bond to itself even tighter so if it was applied to just one spot it could be broken off but if hte entire cone is coated it wont shatter or break. Even if it was a poor bonding, it only need sufficient hold to maintain the shape and air tightness of the cone. It can also be easily be applied evenly throughout the cone surface.

Since its the cone that's cracked, I don't see how putting goop over the crack could cause the voice coil to pull unevenly on the cone.

Have you ever successfully bonded resin to PP? I used to do a lot of work with different plastics in my previous life, and found very few things that would stick to PP at all. The few things that did, didn't stay stuck for long. We used to vacuum form PP into molds for polyurethane resin...they didn't even require any type of mold release.

Resin will probably appear to bond to the PP, but will then start to crack away. Then, you'll end up with two cones, one PP and one polyester resin. Unreinforced polyester is very brittle, so that cone will start to crack and come apart.

Toby

[Notladstyle]

Since its the cone that's cracked, I don't see how putting goop over the crack could cause the voice coil to pull unevenly on the cone.

Have you ever successfully bonded resin to PP? I used to do a lot of work with different plastics in my previous life, and found very few things that would stick to PP at all. The few things that did, didn't stay stuck for long. We used to vacuum form PP into molds for polyurethane resin...they didn't even require any type of mold release.

Resin will probably appear to bond to the PP, but will then start to crack away. Then, you'll end up with two cones, one PP and one polyester resin. Unreinforced polyester is very brittle, so that cone will start to crack and come apart.

Toby

Ive got a diamond D1 sub which I beleive is pp that can be tested on.
will do it this weekend, may bring to your shop to test it out ;)

[TBSpyder]

Time for a new sub. :cool:

[Lookin2GoFA$T]

thanks everybody for the advice. some of it sounds very good and i will apply it soon, and hopefully i won't have to get some new stuff.

[TJElite]

Time for a new sub. :cool:

Perhaps the best advice. You might also try and send it back to Infinity. In my experience with other manufacturers, if you admit to the stupid mistake that caused the damage, and just ask nicely, they will often repair or replace it. If you pull some crap like 'yur speaker sukz and jus broked for no reazon', not so likely.

Toby

[POST]

If you pull some crap like 'yur speaker sukz and jus broked for no reazon', not so likely.

Toby

hahaha i can only imagine toby actually saying that.:lol:

[93ex]

I've mad emolds on plastic with glass, no release wax or anything. I thought it was a known fact that resin will stick to everything except glass, plastic, and metal..

Or is it that resin wil stick to anything you dont want resin on? Maybe I should try that approach from now on out with glassing of plastic.

[Notladstyle]

I've mad emolds on plastic with glass, no release wax or anything. I thought it was a known fact that resin will stick to everything except glass, plastic, and metal..

Or is it that resin wil stick to anything you dont want resin on? Maybe I should try that approach from now on out with glassing of plastic.

well since I did it to a paper cone I dunno =(

BUT! we shall see if a complete cone coat will hold this weekend... possibly with some plastic prep