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IMF owners thread!

What I can never get my head around is that John Wright spent so much of his life getting things to work harmoniously and new owners seem to want to re-invent the wheel in 10 seconds and then wonder why these systems no longer sound correct. Electrolytics were chosen for a reason and Jerry has pretty much suggested that.
 
poly caps are an accepted standard upgrade for most other speakers in this hobby, I can see why folks want to try them here too

the 5.4 that replaced the 6.0 might be an issue, depends on where it was in the circuit
sansui88 - I would also double-check any of the wires re-soldered... were all of the drivers operating?

oh wait, you bought poly mundorfs for 60 and 100? those can't have been cheap!
also, I'm having a hard time finding a 60uf from them, maybe I'm not in the right category?
 
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Well the 60uf came from sound imports from Germany and the 100uf I got from hifi collective. I have put some Mundorf electrolytics in and the sound after a few minutes is where I expect it to be. Just need to get the other speaker done
 
The other is done, managed to keep the kids occupied for 20 minutes :) if any one spots I used a 6.8uf on both crossovers as I already had these at home and thought might aswell use them.
 

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Hi. I have a question for Yvan_donald. Does replacing the cables only between the crossover and the loudspeakers make sense? Without replacing the cables between the crossover and the rear fender (terminal)? I understand that Falcon acoustic capacitor putty is the right choice? Thank you for your help.
 
Hi, for zibi, yes it's better to changeto the terminals, because what is worth to change only the woofer or midranges, if from the posts to x-over is still small gauge, best regards,Yvan.
 
This is my RSPM Falcon capacitor upgrade kit after fitting, my biggest mistake was not straightening the white blocks prior to taking the photos I did. Yes they were factory fitted like that but all perfectly aligned prior to re-installation.





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Well I finally picked up my pre-imf speakers today. I am terribly under impressed. The bass seems very subdued...like there is none there. If I stand in front within 3 feet I can hear the bass but when I am in the sweet spot....nothing! I haver several picks of the crossover now, and they look like all original caps which is likey my issue, but I have no idea about the padding inside the cabinet. These are pre IMF MDKT speakers and cabinets. All the drivers seem to be working fine. but the bass seems to be sucked out of the presentation unless I am within a couple feet of the cabinet. crossover pics attached....
 

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That must be frustrating!

Im waiting for someone who has experienced this specific model to chime in, but I’m surprised by what you’re hearing

a recap might help, but other things to check now is that you don’t have any weird air leaks, room placement or speakers wired out of phase?
 
beekeo said:
That must be frustrating!

Im waiting for someone who has experienced this specific model to chime in, but I’m surprised by what you’re hearing

a recap might help, but other things to check now is that you don’t have any weird air leaks, room placement or speakers wired out of phase?
Click to expand...

I was thinking the same thing about the air leaks, They seem to be a very sturdy cabinet and in this model the baffle looks to be held on with nails similar to those used in boat building with the ribs, so I fear that it is pressboard trying to remove it would destroy it. There is no sealing behind the woofer so that will be a first step, I will wait until the caps arrive from Falcon for that. Phase seems to be correct. I have listened to several of my records that I use for speaker testing, and I am confused as some sound much better and some that I am used to hearing a lot of bottom end from such as the opening to Eva Cassidy's Songbird, these do not reproduce properly, and I am using the audiophile 33 rpm hoffman/gray mastered copy. Yet, Love Scenes 33 rpm ORG pressing is amazing in every respect.

I find these really bring out the sibilance or at least let you know it is on the recording. The phase seems correct, although I used the you tube track that someone posted in this thread a while back. I guess I will make a final decision after I rebuild the crossovers. One things these speakers either never had, or is missing or was not thought about yet was the tube/isolation for the mid range. I would love to hear from anyone who has a pair of these mdkt models, to find out if there speakers had the mid range with a tube. I really think it needs that isolation, I would need someone to provide the specs on that tube and how it is held in place inside the cabinet, and if it is damped or not. Lots to learn and play around with.
 
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Pick up a set of these unbranded speakers on a whim, because they literally looked new and unused. Can't quite figure out what they are. TDL something?
 

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