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IMF owners thread!

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Finally done with the recap- started it last night but I had attempted to remove the foam from the circuit boards with manual hand brushes and it was taking forever! This morning I picked up some brass wire brushes made by Dremel and they made short work of it.

I still can’t hear anything from the super tweeters using the cardboard tube trick, but I was able to verify with a frequency generator app on my iPad and SoundTools on my iPhone that the super tweeters are in fact pushing out 20KHz, I just can’t hear it! (too many rock shows and friends’ garage band practices) I will have to grab my kids with their baby ears and see how high the speakers audibly go.

but even if I can’t hear tones over 14 KHz, the recap definitely improved the sound, more sparkle, more clarity

I did verify that both woofers are Kef SP1039, the big magnet B200’s, the right-side one must have been reconed with paper (looks professional, definitely not the same hand that did the wiring and drilling).

next steps are making them look better (as my wife reminded me at 11pm)… I’m thinking that citristrip might do bad things to the exposed foam and sanding the front baffles without messing up the metal trim will be tough. Currently thinking about making grills and ordering IMF badges from eBay. Then doing hand sanding the top and sides, rebuilding the crunched corner and then multiple coats of danish oil. Time for some research.
 
There's plenty of those B200's that turn up on eBay. In actual fact I'd get a pair of the upgrade Elac units that were used in the Super Compact Mk II. They are a direct fit and are a far better driver than the original KEF units that were used.

BTW the eBay listing below is the exact replacement that you'd need to match your original unit, but it's not the ones I was referring to as an upgrade.

https://www.ebay.com.au/itm/313923830272?hash=item4917518200:g:rwQAAOSwmw1iOQ-7
 
Anyone know what the difference is between the IMF 4/200 and the IMF 4/140F midrange's?

so I just ordered a pair of these off of ebay, wasn't 100% awake so I didn't notice the model number discrepency
per this chart, 4/140 and 4/200's are both 4" drivers but the 140 and 200 refer to their resonant frequencies. so the 140 will sound/measure differently, but whether or not it would be audible to me is unknown.
hopefully they will fit better and sound better than the 4" bose drivers currently installed.
https://www.falconacoustics.co.uk/downloads/Elacimftdl.pdf
 
Elac 4/140
these were packed really well, double-boxed and zip-tied face-to-face. Gentle pressure shows no rubbing from the voice coils.
The felt gaskets look to be in good shape.
Next step is cleaning the crispy foam off and taking some measurements so I can figure out which 4” surrounds are the best fit.

Is there a known supplier of best refoam kits?

also I found a single sp1039 with the bextrene cone intact in the UK, just waiting on a tracking number.
I wasn’t initially in a hurry to replace that driver but my wonderful wife insisted (she agrees that they sound great, but I think she wants it all sorted so I don’t develop a wandering eye for other speakers)
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There used to be a seller on evilbay called "Good HiFi" that operated out of The Netherlands that used to have these surrounds listed all the time. I'm not sure if they are still operating anymore as I haven't seen their listing for a while, but someone on here might know where to source these from. They are a pretty standard 4 inch foam surround and there are plenty listed on the ol' bay from various suppliers.
 
thanks!
yeah when I had them in hand I was able to take measurements and see that simply speakers carries a set that's nearly identical for the interior and exterior diameters
I can't say that the roll profile is an exact match because the old foams are so collapsed
 
Hi.I have IMF Supercompact ll.One tweeter have a problem (Audax hd 12x8 d25).Can i swap on Peerless dt 10 hfc tweeters(first imf super compact)?
 
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There used to be a seller on evilbay called "Good HiFi" that operated out of The Netherlands that used to have these surrounds listed all the time. I'm not sure if they are still operating anymore as I haven't seen their listing for a while, but someone on here might know where to source these from. They are a pretty standard 4 inch foam surround and there are plenty listed on the ol' bay from various suppliers.
He’s still around, bought a pair of 4 inch surrounds to replace the mids on IMF Super Compact IIs last year; fit perfectly, easy installation. Excellent seller, promptly replaced them when a shipping mishap occurred.
 
Updating everyone, and hopefully getting your thoughts or possible assistance on somehow finally completing my very long and difficult journey to getting my IMF PSPM MKIV's working. Over a year ago, I found a pair of original speakers a couple states away, and went and bought them, as I had been looking foe a pair to buy for many years. Then, replaced all the caps and drivers with ones purchased from Jerry at Falcon England and saving the almost impossible to get tweeters per what I was told. . However, there was a terrible mixup, and the tweeters were thrown out by my friends wife who thought they were parts of the trash. Since then I've been desperately trying to find a pair of Celestion HF1300 tweeters to replace them. The next step was a very kind offer from Yvan, who I purchased a pair of tweeters from (though they were not the "correct" 8 ohms" I then followed his instructions:


Hi Slapshot, the seller on ebay ninomusic sell these, you can order two at the same time.He sell two type of coil ,one is just the coil (arround 18$)so you have to remove the old coil from the original cone and install this new coil, you probably have to made a template to center the new coil. The other seems like complete with the coil but different cone material and have a dome shape, I don't no if the sound will be altered compare to original price arround 35-40$.Myself I will take just the coil to keep the same voicing.Yvan.

For nearly a year,. ninomusic's listing on EBAY showed that he only had one voice coil left. Eventually that listing too, disappeared. When I finally wrote to him about a month ago, asking if it was possible he had any more, he directed me to a listing on EBAY France, where he had more available. Something I was very thankful for. However, the picture and caption showed and indicated an actual HF1300 tweeter. That was what I though I was purchasing, especially given the $90.00 price. Yesterday, I received a tiny package, and in it, were only replacement diaphragms and a pair of paper washers/templates? Are diaphragms the same as voice coils? I've also not been able to find any technician/shop locally who wants to swap out voice coils?

I'm at an absolute loss as to what to do now, and horribly frustrated in trying to get these speakers working. Between the original purchase and the cost of the replacement caps and parts kit, and the replacement drivers from England, I've got over $2k invested, with no return as of yet, and I'm unsure if any solution is in sight. Any assistance, recommendations or suggestions would be greatly appreciated.

I have not been able to locate any HF1300 8 ohm tweeters in a year of looking. I know a couple people here in the forum, as well as Jerry at falcon, said they would also keep their eyes open, and check all their sources in hopes they might come across a pair for me to purchase. That would be like a miracle, at this point.
 
@Slapshot I remember reading your posts on previous pages of this thread, is the issue that you can't find specifically 8 ohm versions of the HF 1300?
I'm seeing 4 and 15 ohm versions in the UK via hifishark dot com
 
@Slapshot I remember reading your posts on previous pages of this thread, is the issue that you can't find specifically 8 ohm versions of the HF 1300?
I'm seeing 4 and 15 ohm versions in the UK via hifishark dot com
Yes, these speakers require the 8 ohm version to perform as intended. The pair I have need to be converted to 8 ohm with the proper voice coil.

I just received this message back from my inquiry to the seller:

"Hello, I did not understand your two messages. If you have tweeters under 8 ohms, you must take diaphragms under 8 ohms. If it's 4 ohms then stay under 4 ohms. Regarding the product, the diaphragm is a dome and a coil. cordially"

So it appears that I have the dome and the coil, although the combined unit is not much bigger than a nickel, in diameter, and three times thickness. So it seems I have what would be needed? However, with not being able to find any audio repair shop that will perform the work, I think I have essentially thrown away the $90.00 and still need to find two 8ohm tweeters. :(
 
Ok, looking at Nino’s eBay postings, I’m assuming he sent you something that looks like this? (One of the original busted up audax drivers from my speakers)
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But you need it mounted in that cylinder with the jet-engine-looking thing on the top?
 
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but also, it does look like Nino sells 8 ohm versions, if that's what was sent you are ok... but yeah, they shouldn't use the photo of an entire tweeter
 
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