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IMF owners thread!

+ increases treble/high frequencies
- decreases treble/high frequencies

not tons, but enough to be audible
 
Hey all,
Been an owner a set of TLS50II for about a year and a half now. Started to notice that the mids/upper mids were just sounding a bit muffled on one (best adjective I can think of.) So I decided I was likely overdue for a recap and was optimistic it would fix that problem. All I had done on them previously was just a refoaming of the midrange after I bought them because they were all crusted and cracked. So I bought the recap kit from Falcon which arrived this week. I opened up the first speaker speaker this afternoon, and after seeing the board, noticed I don't have the 100uF 100V capacitors, unless I'm supposed to replace them with something else.

Any advice would be appreciated, photos attached.

Here's a photo of my crossover:
IMG_2095.jpg
What I received from Falcon was:
IMG_2097.jpg
 
Hmm yeah I would contact falcon, I have same crossover in my TLS ii’s and the kit they sent me last year included the 100ufd caps

Top left corner in this image

IMG_4565.png
 
Hi, I have a question for you. Have any of you compared the IMF tls 50 with the IMF studio monitor or the ALS40/40mkII? My experience with the tls50 shows that these speakers sound best with a powerful/very powerful amplifier.
Studio monitors belong to the reference series. Are they much better than the tls50?
 
Hmm yeah I would contact falcon, I have same crossover in my TLS ii’s and the kit they sent me last year included the 100ufd caps
Click to expand...
You may have an export version of these speakers. I had the same with my tls50 mkI. There were differences in the values of the capacitors. Falcon said I have an export version.
Always take a picture of the crossover before ordering.
 
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Who can help me with some pictures or service manual how to open my TLS80-II. I want to recap the filter and replace the internal cables if possible.
 
Hi Fborden, welcome!

Replacing the caps in the crossover circuits is fairly typical, remove the woofer for access to the primary PCB.

the complication is that my TLS-50 ii had a lot of glue holding the circuit board to the foam. if your’s is similar, you’ll need to rip it out and then clean off the foam and glue ( I used nylon brushes and a soft wire brush attachment for a rotary tool). I used Velcro tape to anchor it back in place.

If the speaker terminal on the back has tone controls, there are another cap or two in a circuit on the backside of the cup.

There might be additional steps specific to the 80’s that I am unaware of.

Some folks have replaced the wiring, I’ll defer to them on the effort/reward of that upgrade.
 
Hi Beekeo
Thank you for the reply. I unscrewed the B139 but could not lift it out. How did you remove it? Also I tried to unscrew the front but it did not come of either. Any hints how to?
 
I have a different KEF woofer in my 50’s so my experience isn’t identical… does it seem like the B139 is glued in place or is it more trying to get it out of the recess while the speaker is on its back?
 
Hi, woofer is not glue, pry it with something, it should move. The baffle is glue, even removing the scews, it's impossible to open without breaking it.
 
Hi everyone, First post here.

I picked up a pair of IMF ALS 40'S last weekend after seeing them on Facebook Market place and knowing I had to rescue them off I went, £25 later and a 90 minute round trip I got them home... As you can see, someone did a lovely home paint job on them at some point in there life but also replaced two woofers with some "Skytronic 902.148"...I'm not sure the tweeters are original either but neither of them work anyway

I quickly stripped one side and a top to see what was underneath,then decided I needed to seek out people with more knowledge than me.

I have a few questions...

Are these a solid wood or are they veneer, They're so caked in paint I can't really tell.?

What was originally used for the woofers that have been replaced.?

Was the lower woofer coating done for tuning?

And just any general knowledge about these speakers would be great, I'm just about to start this thread from page one so hopefully I'll answer my own questions

Thanks for reading..
 

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https://www.imf-electronics.com/hom...tronics/speakers-categories/the-studios/als40

Hi GingerOn3, welcome!

Woofers I believe should all be KEF B200, might be specifically the SP1039 version but I’m not sure, the ones in my TLS 50’s don’t use the metal clips, but that would just be a frame difference. the weird appearance of the lower ones I believe is the result of age… if you pull them, do they have a label and marker from KEF?

Replacing four would be a hassle from the US, but would be easier from the UK.

The cabinet is veneer, not solid wood.

Once you verify your drivers are all working or have been replaced, you’ll need to get capacitor replacements, either a kit from Falcon or find individual pieces from other suppliers.
 
beekeo said:
https://www.imf-electronics.com/hom...tronics/speakers-categories/the-studios/als40

Hi GingerOn3, welcome!

Woofers I believe should all be KEF B200, might be specifically the SP1039 version but I’m not sure, the ones in my TLS 50’s don’t use the metal clips, but that would just be a frame difference. the weird appearance of the lower ones I believe is the result of age… if you pull them, do they have a label and marker from KEF?

Replacing four would be a hassle from the US, but would be easier from the UK.

The cabinet is veneer, not solid wood.

Once you verify your drivers are all working or have been replaced, you’ll need to get capacitor replacements, either a kit from Falcon or find individual pieces from other suppliers.
Click to expand...

I've seen the same coating on IMF super compacts, it's definitely not age related, it's intentional as its coated on to the cone itself and it's not sticky or anything, I've attached a couple more pictures of the same but from different models of IMFs. They are unbranded when I removed my ones as seen in the last image..

I've recapped and worked on quite a few speakers but IMF are a complete unknown to me apart from what I've garnered from the Internet so far.

Appreciate the input, any new information is good information.
 

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Ginger0n3 said:
I've seen the same coating on IMF super compacts, it's definitely not age related, it's intentional as its coated on to the cone itself and it's not sticky or anything, I've attached a couple more pictures of the same but from different models of IMFs. They are unbranded when I removed my ones as seen in the last image..

I've recapped and worked on quite a few speakers but IMF are a complete unknown to me apart from what I've garnered from the Internet so far.
Click to expand...
Also is there an actual difference between ALS 40'S and ALS 40'SII, plenty of info about the latter like the response graphs and the likes but not a lot about the former, are they just the same?
 
Hi, IMF use the coating if the cone is paper like on the Peerless woofer. On the Kef because is bextrene cone, no coating . Only the old SP1003 because of bad résonance, IMF apply the coating. If you need coating buy the Visaton LTS 50 coating
 

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Hi, (GingerOn3) you're bottom woofer is a peerless, the other one should be KEF SP 1014 or Peerless but very hard to find. IMF used Peerless and KEF woofer at the beginning for the MkI serie. KEF SP1039 was used on TLS 50 Mk II
 
Hi, the wood is veneer, tweeter's are original Peerless, midranges original EMI. Better change all capacitors with Falcon kit or better
 
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