Infinity EMIT Speaker Repair

Some RS-1b owners (of which I at one time was) buy spare sets of speakers fitted with the EMIT and EMIM drivers, to have as spares/replacements. Loose drivers occasionally pop up on ebay, but they're not cheap: A single EMIT and EMIM pairing sold recently for $850!

Which EMIT, K? There are a few kinds.. The real old ones you have to inspect the magnets, make sure they are not flaking and secure them with a GREAT glue, if they need it.. The DIY is pretty easy. I used a press and flat vice.. Worked perfect after a couple of adjustments. Clamping the vice.. It will move.. those magnets.. LOL can be powerful.. The vice moved on me.. I was moving pretty quick.. 

As long as there are diaphragms, you can always find magnets. Actually better magnets too..

I have a couple pairs that need fixing.. Infinitesimal V.5 needs one..

That's a great speaker Infinitesimal, the first two. Aluminum/Mag speakers..  I have two pairs.. 700-1500.00 a pair..

Magic Markey too, in Kentucky.. Lots of Infinity parts.. Gettin' older, He is a Doctor of some sort too.

I have the Infinity RS IIb speakers with the regular EMIT tweeters. The rear EMITS are blown. I tried new 1 1/4 Amp fuses with no joy. I can see the ribbon diaphragm is melted on both. I found this YouTube video by Bob Douglas. Watch "Infinity EMIT Tweeter Repair Replacement Procedure" on YouTube
https://youtu.be/yXaVErRn6u4

Any feedback is welcome. 

joeradio


I have fixed these years ago, without buying new wafers

Dismantled it quite easy, on the wafer first check/measure with a magnifying glass the lead in lead (circled in red) out tracks for breaks,
The the continual ribbon itself.
If you can see the break you can with a pin and steady hands put just the smallest dab of quality electrically conductive paint/glue across the crack you’ve found, without joining the adjacent track to it, wait for it to dry properly. https://ibb.co/BwpG8Lt

Cheers George

Thanks for all of your helpful responses. From what I gather replacing the diaphragms seem pretty straightforward. I will know better once I take them out and do an inspection. 🔈🔍