iMac G3 speaker replacement success

mac27

Tinkerer
Apr 30, 2024
47
45
18
Virginia, USA
www.mac27.net
Replacement of the iMac G3 internal speakers - I recently took on this project, which had been needing done for quite a while. Figured I'd document it here in case it is helpful to others in the future.

My iMac's speakers had rotted out pretty badly; they sounded terrible and were falling apart (as is typical for these nowadays). I didn't want to go with OEM parts since they'd be just as prone to the same issue, so I ordered these replacement drivers instead (which, despite coming all the way from China, somehow arrived in less than a week). These are direct slot-in replacements and there is no soldering required.

Removing the speaker assemblies from the iMac was the hardest part of this; they are held in place with a retaining clip (part of their acrylic housing) that you can't access and can barely even see. I eventually figured out that you have to pull the assemblies outboard (away from the center of the iMac) a bit, to bend the clips and allow them to release much more easily. This is the *opposite* of what many of the online guides tell you to do, but thanks to a few helpful folks on FB for suggesting this. You can then pry sideways with a screwdriver against the central chassis and they eventually come out. What a terrible design, lol.

After that, getting the new drivers installed into the housings wasn't too hard. Getting the flanges/tabs on the new drivers to slip into the slots on the two halves of the housings while reassembling them was a bit fiddly but using some hot glue to hold the drivers in place helped. The spade connectors were extremely difficult to remove from one of the speakers for some reason, so I had to cut the tabs off and use two pairs of pliers to yank them out. Some isopropyl alcohol helped remove the sticky remains of the old surrounds from the housing bezels. Be sure to re-route the wires through the housing as they were originally.

The original drivers have a metal shield and magnet glued onto their backs, which I couldn't see a way to remove. The new drivers work fine without them. Would be interested to hear if anyone has experience re-using them with new drivers.

Very happy to have an iMac that sounds great again (especially when paired with the iSub!) and no more sticky green mess. It's given me a bit more confidence to tackle a re-surround of my G4 Cube speakers and standalone Pro Speakers sometime in the future. I understand those do require soldering but otherwise a fairly similar job.


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Original rotten driver

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Original (left) vs. new part (right)

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Refurbished speakers ready to be reinstalled into the iMac

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Sounds great now - especially with the iSub hooked up!
 

mac27

Tinkerer
Apr 30, 2024
47
45
18
Virginia, USA
www.mac27.net
Yeah, there are probably several replacement options available. These sound fine but not amazing, but I'm not sure how much of that is related to the original metal shields and magnets not being present on the backs anymore.
 

dgveedubbus89

New Tinkerer
Jun 11, 2024
16
5
3
35
Homestead, FL
I know this was a bit ago but I just did this speaker replacement last night on my DV SE. I used some JBL replacements from Amazon and they also fit perfectly.

The rear housing of the old speakers are meant to shield the CRT from the magnetism of the speakers. They are glued to the old speakers but I was able to use a flathead screwdriver and some force with a hammer on my garage floor to separate the two, granted the old magnets are now destroyed but that fact the drivers were useless makes that a null problem. I simply super glued the shields to the new replacement speakers and they went it w/o a hitch. I too used a bit of hot glue to keep things secure and I am happy to report that the replacements sound great.

Now how does one get an iSub!!! That setup looks way too cool!!!
 

mac27

Tinkerer
Apr 30, 2024
47
45
18
Virginia, USA
www.mac27.net
Glad to hear it! Yeah, I figured they'd eventually come off with enough force but I lack a concrete floor to use. I've kept the old drivers so I can swap the shields over at some point in the future ... though the CRT doesn't seem to be visibly impacted by whatever magnetism is present.

The original USB iSubs can be found for pretty cheap these days! Mine came CIB with an iMac G4 I got a while back. Lots of boxed units on the 'bay as well.
 
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