You don’t even have to do that. First of all, the correct practice is to always glue the surround to the amp and wait for it to lock. You don’t have to wait for cure. Lock is good enough. Shimming or not, this is the pro method. If you are using tacky acetone based glued like JBL glue, the lock will be quick. White water based glued will take quite a bit longer. When you have set your alignment, you can lift the outer part of the edge with your thumb and glue underneath it. Rotate the basket as you go. All these people come up with a lot of unnecessary methods simply because they don’t know what they are doing and they don’t understand the materials they are working with. Some of these methods cause more harm than help.

No problem, glad it helped. I've used this trick on a few speakers, and its a lot easier than cutting the cone and shimming it.

Thanks again...@@OfficialSoundtracker

Great comment. I was very surprised to see him hardwire a speaker to a battery. DC blows up speakers.

@@donmoore7785 exactly my thoughts too. I've encountered plenty of speakers which were damaged from DC offset from old receivers and amps not calibrated. Seeing a constant DC voltage without heat dissipation looks very difficult to watch. I'm biased though because as a child I did that same thing to a midbass driver and watched it seize up.

I absolutely agree the constant voltage/current applied to the voice-coil will likely cook the voice-coil. Many Speakers are damaged by "Clipping" which is a flat-topped sine-wave (approaching a square-wave) which can and does damage voice coils. This 9 volt battery is not good. I've used an AA cell to determine which lug is positive on the Speaker in cases where they are not labelled. If the cone moves "outward", check the polarity of the battery. The plus side of the battery is the plus (red) side of the Speaker.

Hi there. I had worked in a repair shop for various hifi units, the reason I used this method was because it was the one our lead technician used. I haven't worked there in a little while, but of the various speakers I've re-foamed, the 9v method hadn't led to a damaged voice coil as far as I'd seen, both with speakers that I've done, and speakers that left the old shop. I would like to leave room for error though as I am still learning a few things, and in this video passed on what I thought was good information at the time. Obviously I wouldn't want a video I make to pass on the wrong information, my intention isn't to damage anyone elses gear, its to show repair can be easier than presumed. I'll have to do a follow up on this and look into better methods of refoaming the speakers as well as making sure they are seated properly. The resistor would rake care of the current issue but it occurred to me a bit later that gravity over time may seat the coils a bit lopsided from their intended position while waiting for the glue to set. What do you think would be a good workaround for that?

@@OfficialSoundtracker why don't you just run regular bass music thru amp to do alignment? Isn't that the safest way?

Thanks, your comment made me watch the rest of the video after the way to long toolkit ad. Other centering methods did not make me feel confident. Watching people who make an instructional video who we quickly see are discovering the path after watching other peoples instructions, rather than being a sagely guide can be very annoying, but they also can sometimes give us a good preview of things to NOT do.

Hi there. I've also worked in a repair shop for various hifi units, the reason I used this method was because it was the one our lead technician used. I haven't worked there in a little while, but of the various speakers I've re-foamed, the 9v method hasn't led to a damaged voice coil as far as I've seen, both with speakers that I've done, and speakers that left the old shop. I would like to leave room for error though as I am still learning a few things, and in this video passed on what I thought was good information at the time. Obviously I wouldn't want a video I make to pass on the wrong information, my intention isn't to damage anyone elses gear, its to show repair can be easier thsn presumed. I am curious, if this does in fact damage voice coils, what would you use as the proper method?

isn't running bass music thru amplifier wired to speaker much safer and provide same application?

Thanks for the tip, I'd never actually considered the foam peeling back over time. I'll give it a try on my next refoam :)

isn't just pumping bass music thru amp wired to speaker much better safer way???

And how would you hold the doorbell in to apply the adhesive?

I've received variations on this comment, at the time of publishing I was acting on advice from the lead technician in a stereo repair shop I worked at. Fortunately the speakers I've done this to are still working. I've been told so far from others that it may burn out the coil to apply DC, but haven't heard back from anyone yet what they consider the proper method. I'm curious, and would like to make an updated video to this, how would you go about centering the speaker if not this?

I was unaware of this, thanks for letting me know. I don't have any way of giving my speakers a low AC power when I redo their surrounds, so for now the battery method will have to do. Is there a device you'd suggest that could give the speakers a low burs of AC to reposition the cones?

@@OfficialSoundtracker so you don't have amp playing bass music connected to speaker to do this application? isn't using an amp much safer way to calibrate???

Hey there :) The opening theme is a song I've uploaded to my channel, it's called Be With Me by a group called Fizz. And thanks very much, I'm glad the info helped, and hope the refoam went well!

Thank you for the words, I'm glad it could help :) I'm sorry it took so long to reply to this. I think they sound very good, I tried them with a few receivers ,and am currently using them as the back speakers for a surround sound amp, they're very rich and clear to me. The driver is decent enough to get a lot of the mids and some lows out pretty well, and the tweeter is bright but not intrusively so. Hope this helps, and good luck with the refoam!

I am curious about that, do you lamp it to the cone itself and then to the basket?

Yes, I've been informed. I was going off of advice from someone who was the lead technician at a shop I worked at that had a stereo repair facility. He used that method plenty so I figured it was okay without having double checked before recording this. I was inclined to take his word at the time since I'd always seen it work. On that note, what would you recommend for centering the foam?

Hey :) If you mean the opening theme, it was a record I got from a store. From what I've found out, it was a private press, which essentially means that some people knew a guy who had a studio and they only made one single. The band is called The Fizz, and the song is Be With Me. Would you like me to upload the full version of the song?

static1994 Omg thank youuuu!!!! My son is 12 and he’s Autistic and he loves these robotic, etc videos and he fell in love with this song and he’s been so anxious and non stop searching but to no avail and I finally thought about asking here. So he’s super excited right now and has it on replay!! Thank you so much from both of us!!! You have made two people extremely happy 👍🏼❤️

You're welcome, and aww, that's very sweet :) How long has he been watching things on robotics? And I gotcha, the song is really hard to find, mainly because private press records were never publicly released. I found it by chance. It's a great song, I'll have it uploaded in a bit for you :) And you're very welcome!!

I've put the song up, it's titled Fizz - Be With Me. Enjoy! :)

Thanks so much :)