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IMF owners thread!

The MK 7 have the midrange more insulate compare to the old system using the carboard tube ,different approach and putting the tweeter's lower probably bring more clearer overall sound. Like you probably know myself Î'm more old school thinking in term of speaker design, have a prof. Mk 3 modify with mundorf capacitors and other good quality film, I have insulate the inside cardboard tube with 1/2" active carbon (aquarium filter) and improved the wires Kef use this kind of active carbon for his 107 midranges. I read it is the best products as sound barrier,because of open cell,the sound is lost in the cavities. It make a good improvment in my speaker as insulate the bass frequency to be mix with the mids frequency and vice versa, at high volume,everything much clearer.Listening lots of big classical symphonies it sound fantastic and very realistic to my ears. The mk 3 they say goes down to 10 hz, believe me the bass is effortless without coloration and because thej celestion tweeter's have no ferrofluid, do not dry always sound great.Drive them with tube preamp audio research with Bryston amp.
 
Yvan_donald said:
The MK 7 have the midrange more insulate compare to the old system using the carboard tube ,different approach and putting the tweeter's lower probably bring more clearer overall sound. Like you probably know myself Î'm more old school thinking in term of speaker design, have a prof. Mk 3 modify with mundorf capacitors and other good quality film, I have insulate the inside cardboard tube with 1/2" active carbon (aquarium filter) and improved the wires Kef use this kind of active carbon for his 107 midranges. I read it is the best products as sound barrier,because of open cell,the sound is lost in the cavities. It make a good improvment in my speaker as insulate the bass frequency to be mix with the mids frequency and vice versa, at high volume,everything much clearer.Listening lots of big classical symphonies it sound fantastic and very realistic to my ears. The mk 3 they say goes down to 10 hz, believe me the bass is effortless without coloration and because thej celestion tweeter's have no ferrofluid, do not dry always sound great.Drive them with tube preamp audio research with Bryston amp.
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I have mundorfs aswell in the mk7s. I have the black ones alu in oil caps. What du you use?
I think i will leave the internal wiring as it is, i afraid to mess with the natual sounding balance that the speaker have.
 
Hi, yes the MK 7 have good size copper wires, myself in the x-over , in each speaker's, I bought Mundorf 2.2 uf SGO, it cost me $110.00 × 10 + and 2 x Mundorf .47 SGO, the 6 uf and 12 uf I find Kimberkap at a real good price and they sound really good, like you can see I invest good amount of money in my MK 3, last year I bought Mundorf air foil coil (8), to replace the old ones,but until now I didn't take the time to install them but Because of huge size I have to make new x-over.probably on external board.
 
Yvan_donald said:
Hi, yes the MK 7 have good size copper wires, myself in the x-over , in each speaker's, I bought Mundorf 2.2 uf SGO, it cost me $110.00 × 10 + and 2 x Mundorf .47 SGO, the 6 uf and 12 uf I find Kimberkap at a real good price and they sound really good, like you can see I invest good amount of money in my MK 3, last year I bought Mundorf air foil coil (8), to replace the old ones,but until now I didn't take the time to install them but Because of huge size I have to make new x-over.probably on external board.
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Looking good. Would love to hear them :)
 
Just FYI - there is a pair of IMFs for sale on the Ann Arbor Michigan Craigslist Electronics section. I'm not affiliated in any way with the seller.
 
My RSPM IV received their final treatment: Not liking electrolyte caps in the signal path and having removed those in front of the tweeter section I decided to see what would happen if the 60uF cap was replaced by a film cap. Was there anything wrong in terms of sound with the new Alcap? Nope - but curiosity got the better of me. Now this was meant to be an experiment (so please no bank breaking caps) and there is the issue of space on the crossver board. Well, eventually an ebay auction for Wima DC LINK MKR4 caps caught my eye - yes, they were still big, but for the asking price.....
Anyway, I managed to attach them to the back of the crossover board - extended their tiny legs - and then - let 'em rip. I don't think I had any preconceived notion of what I was supposed to hear - and yes, it's a purely subjective experience - but for me there is definitely no going back to the Alcap. The speaker has became more open and fluid/smooth sounding. Did the replacement of the electrolyte change the overall voicing of those speakers? No, not to my ears - it's a bit like the icing on a cake - fine without, but once added....
 
Hi,With my experience, I spend quite amount of money on my Mk 3 on the capacitors, 10X 2.2uf $110. Each. ,2X .47 uf $70 each,have a good deal on the 2X 6uf and 2X 12uf like $120, used klaricap almost new.To me no matter what the they say about the voicing,like you the sound has improved and the voicing is very well the same but more detail and precise.
 
More precise indeed - I was listening to Mancini's "Pink Panther" and the separation between channels is a lot clearer - at the beginning of the title track I first thought my right channel had gone silent, but then the brass entered on the right - before that - just silence - go figure. I think with the 60uF bottle neck "removed" one gets an even clearer impression of recordings - cool - I like that.
 
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