How to fix pushed-in Altec 414z vented dustcap?

Thermionics

Post Whore In Training
My puppy, Buddy, stuck his nose in my right 414z woofer (making me realize I really need speaker grilles), pushing in the vented dustcap. Is there any way to get these back out (I'm assuming the vacuum cleaner trick won't work because of the vented dustcap) or am I SOL and will need to replace the dustcap?

20201130_031459518_iOS.jpg
 
Yeah, vacuum. Use the adjustable slot to regulate how much suction. My Festool vac has adjustable power which is kinda cool for this need. Unfortunately, it will be fairly wrinkled when pulled back out.
I also have used duct tape with decent results but be careful it isn't too sticky.
 
Dude! my dog did the same thing to a pair of 414A sitting on the ground. He stuck his long nose in there and nibbled at them. He was in a zombie state at the tail end of a seizure so I couldn't get on him for it. Otherwise he never chewed anything ever. One of the benefits of herding dogs is they typically dont chew after puppy months if then.
I ended up getting 2 new caps from GPA. $8 each.

414A Dustcap oops.jpg
 

Ernie

Me
There is a seldom-proffered method which can give favourable results, when more popular methods fail. Get yourself a straight pin such as a sewing pin, or hatpin. You do not want a sewing needle, as they are hardened steel. Pins are often made of plated brass, thus are a bit more malleable, which makes them ideal for this task. Hold the pin securely, with your fingertips near to the point. On some hard, smooth, surface, apply sideways pressure, which should roll the very point of the pin into a tiny hook. This hook can be used to pull the dents out. Insert just the very point, so as to avoid leaving a visible hole, from the shaft of the pin. Be sure to take small increments, starting from the very edge of the damage. Also, check your direction of removal, so that you don't snag the paper on the way back out. It can be slow going, but the results can be superior to tape, or even vacuum methods which can leave more creases than the initial damage caused.
 

Thermionics

Post Whore In Training
Dude! my dog did the same thing to a pair of 414A sitting on the ground. He stuck his long nose in there and nibbled at them. He was in a zombie state at the tail end of a seizure so I couldn't get on him for it. Otherwise he never chewed anything ever. One of the benefits of herding dogs is they typically dont chew after puppy months if then.
I ended up getting 2 new caps from GPA. $8 each.

View attachment 30117
I think my dog was intrigued by NPR and was trying to figure out where the voice was coming from.
 

Thermionics

Post Whore In Training
There is a seldom-proffered method which can give favourable results, when more popular methods fail. Get yourself a straight pin such as a sewing pin, or hatpin. You do not want a sewing needle, as they are hardened steel. Pins are often made of plated brass, thus are a bit more malleable, which makes them ideal for this task. Hold the pin securely, with your fingertips near to the point. On some hard, smooth, surface, apply sideways pressure, which should roll the very point of the pin into a tiny hook. This hook can be used to pull the dents out. Insert just the very point, so as to avoid leaving a visible hole, from the shaft of the pin. Be sure to take small increments, starting from the very edge of the damage. Also, check your direction of removal, so that you don't snag the paper on the way back out. It can be slow going, but the results can be superior to tape, or even vacuum methods which can leave more creases than the initial damage caused.
@Ernie - does this look right? Want to make sure the hook isn't too big.

20201130_211854538_iOS.jpg
 

Wntrmute2

Not So Mediocre Member
You might try a piece of 1/4" tubing you can put in your mouth and suck. Work on the farthest portions first and work towards the center or worst are. It worked for me with no dander of destroying anything.
 
Yeah, vacuum. Use the adjustable slot to regulate how much suction. My Festool vac has adjustable power which is kinda cool for this need. Unfortunately, it will be fairly wrinkled when pulled back out.
I also have used duct tape with decent results but be careful it isn't too sticky.
You Can also use the Festool vac to clean a 755a Magnetic gap. The Festool vac is a Great and Versatile machine.
 

Ernie

Me
That looks very much bigger than the one I used. I rolled just enough of the point over to permit it to catch my fingernail. Think in terms of burnishing the point, like the edge of a cabinet scraper.

I just tried to capture a photo of one that I made. No dice. I held the pin between thumb and forefinger, and supported the back side of the point, as I dragged it across a piece of glass, for about 3". That rolled enough of the point over that I could feel the drag on my fingertip, and catch the edge of my fingernail.

Notwithstanding the macro scale of your hook, that can be made to work, also. It will require a deft and gentle touch, but it might be preferable, if your near vision is somewhat deficient. As a myope, 'close-up' is all I really can see, unassisted.

Good luck to you.
 

Thermionics

Post Whore In Training
I decided to just go with the nuclear option and called Bill at GPA and ordered a pair. He recommended leaving about 1/8" of the dust cap flange all around instead of removing entirely from the cone and gluing to that - slightly better bond as well as less risk to the cone.
 
I had no idea dust caps could be replaced. Good to know as I provided my stereo to a former (small) school for its prom twice and the second year one of my Advent Heritage had a pushed in dustcap. Nice sounding speakers, similar to my B&W CDM-1SE but with better sounding tweeters and play lower as well. Though when I hooked them back up at home I accidentally fed the speakers "full blast" for a few seconds and killed one of them. Hoping it is just a fuse. That was May 2017, on my "to do" list with about 10 other things. :)
 
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