IMF Studio Rebuild

[Frequency295]

Hello fellow AKers, I received a pair of IMF Studio's from a family friend a while back. I replaced the dead b110 woofers and had been using them however the quality seemed to be off and finally got to me. I used a tube to listen to each driver and noticed that the super tweeters didn't seem to be making any sound and one of the audex square tweeters wasn't either. So I plan to try to refresh these units with a new capacitor kit from Falcon Acoustics as well as potentially replace the tweeters. But here is my problem, for the coles super tweeters they come in an 8 ohm and 16 ohm version. How do I determine which is right for my version of IMFs? See picture below for the super tweeter in question... Also had a question about the crossover, what is the silver component? it looks like a capacitor but I'm not understanding the markings. See picture below...

Thanks for looking with me and any help you can provide!

Super Tweeter - No markings. Potential replacements https://www.falconacoustics.co.uk/drive-units-1/imf.html


Crossover - Silver capacitor looking thing. Looks like it says M6M 0,5 MK +-10% 250B IV 71r

 

[Robint]

Try posting in the British Audio section in the IMF thread, There you find the IMF experts.

 

[Frequency295]

Thanks doing this now!

 

[Nat]

Those black caps with red ends are notorious for drifting and failing. I'd replace them automatically.

 

[Frequency295]

Those black caps with red ends are notorious for drifting and failing. I'd replace them automatically.

Yep, I plan to get the replacement kit I saw on FalconAcoustic. Any idea what the silver component is? Is that a capacitor as well? The text doesn't make sense to me. M6M 0,5 MK +-10% 250B IV 71r

 

[nerdorama]

It’s a Russian capacitor. 0.5uF 250V
The MBM is the type which I think might be paper and aluminum foil. Should be fine.

 

[Frequency295]

Strange... Thank you for looking and replying!

It’s a Russian capacitor. 0.5uF 250V
The MBM is the type which I think might be paper and aluminum foil. Should be fine.

 

[Lavane]

Those black caps with red ends are notorious for drifting and failing. I'd replace them automatically.

Yes they are. A pair of Rectilinear Mini lll's I opened up had them.
They were 90uf! I had to used a couple nice 45uf electrolytic caps in parallel to replace them.

 

[Frequency295]

Yep, I found someone else asking about a very similar capacitor on reddit.
Thank you again!!! I wonder why its in the crossover since its not in the schematic...