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IMF owners thread!

Mart Mccall said:
I just joined the IMF owners club. These pair of TLS Mk1 arrived this morning.
Sorry about the light in the photo, it is unusually sunny here today:



I've never heard any IMF before. First impressions: refined, polite, clean in the mids, impressive bass response. Effortless, but deep and tuneful too.
Click to expand...

Those appear to be TLS50 mk. I, can you link to your other photo which shows the woofers, and can you pull the woofers to tell us which make and model (SP #) they are?
 
Hi guys,
I just have a quick question. If one of the super tweeters is blown in a set of tls80's, how much is it going to affect the performance and sound of the speaker? I have a set and it looks like I have a blown one. This could be why I am not impressed totally with the sound. I have been reading all the posts here in this thread and everyone is very happy with theirs, but I have never been that happy. Now I think I know why. Are these tweeters repairable or can a person get a new one? thanks
 
Hi,on ebay if you write celestion HF2000,seller from France sell replacement coil for it with clear dome like original,never try but seems easy to repair if your an andy man with soldering.If the super tweeter doesn't work it for shure affect the high frequency extension.It's a MK I or MK II version TLS 80.,can you put pictures of the speakers,did they have been recapped with new capacitors?
 
Yes they have had a re cap. I did have a look at that seller from France with he replacement parts. I think I might give it a try. Looks pretty straight forward to do. I am wondering I'd anyone else has tried these before?
 
Hi,maybe on Ebay you could look the seller feedback,it will give you some buyer's evaluation of his items.Or you have to find a complete used STW for around $100.00 when availaby,where are you living? But it's a Tls 80 MK I you have?
 
CBN, what do you feel are the deficiencies you're hearing in your speakers? I would think that the tweeters would be more of an issue if you don't think you're getting enough HF or "air" in your sound. The Celestion HF1300's can and sometimes do fail or have reduced output.

The control switches in the back should be cleaned thoroughly with DeOxit and exercised to assure good contact with mid and tweeters. Also, did the components on the switch get changed? In old speakers, I prefer to retouch all solder joints with new solder to eliminate any dissimilar metal or corrosive diode effects.

When, how, and who did the crossover work, and with what caps? One other thing to check is if the speaker baffle and all drivers have been removed or resealed, and if all the drivers are connected properly (polarity) to the crossover. And then if the pair of speakers is properly polarity connected (phasing) to each other. A good mono signal should give a rock solid center central image with strong bass. Any diffuseness, poor image or bass with a mono signal indicates a wiring or polarity fault - suspect from amp through speaker input to crossover to drivers. Refer to schematic of speaker for particulars.
 
Right now witht the bad tweeter the speakers do not seem to be balanced. The right speaker is "stronger" than the left(it has better vocals, and guitars and cymbals from the drums). I was thinking of cleaning the switches on the back. It is something I will do this weekend. They have also been re capped with a kit from falcon acoustics in the uk. I did use a app on my phone to make sure the polarity on the speakers was correct and all checks out ok. To check the internals of the speak does the front cover(where the speakers are mounted) come off? I tried to take it off when I re capped them and it would not come off. Maybe the wood was glued down to the rest of the speaker?
 
HI,all access is from the woofer,front baffle is glue.It is very easy to check if all units work,putting your ears next to it.But again it is a mkI or mkII you have?You can switch the speaker in the other channel,but mono is the best way to compare.
 
Hi,

I have a pair of IMF TLS80 mkII with matching serial numbers.
I was about to recap them and discovered something strange;

When soldering out the old capacitors in my left speaker I noticed that the capacitor refered to as C4 was 12uf not 6uf as the schematic states.

All literature I have read on the TLS80 mkII state that the tweeter HF1300 is a 16 ohm (or 8 ?) unit and the super tweeter HF 2000 is a 8 ohm unit.
Well I measured both units in the speaker and the are both around 5 ohm in my left speaker.
(HF1300 also have a red sticker with "4" on)

I find it very strange, my left speaker does not appear to be tampered with in any way (crossover or speaker-units)

My right speaker have a crossover which matches the schematics (C4 - 6uf) -

So it looks like IMF have put 4 Ohm TW & STW in my left speaker and thus upped the C4 to 12uf

Have anyone else with TLS80 mkII experienced this ?


Thanks in advance,
 
I did buy the replacement coil and clear dome from the seller in France. I did a measure before I took apart and it was showing open so it was toasted. It was a bit of delicate work to get it done, and am very happy with the results. I think it might have been no good for a long time as I do not ever remember these speakers sounding so good. So I guess you can tell what I have been doing over the last few days, listening to some music. Thanks for the help
 
Hi cbn,that's goog news,so it seems we can now fix celestion STW without having to search internet for replacing the complete unit :jump:
Hi pilsern, hard to believe but everything is possible,you should contact Jerry from Falcon and ask is opinion on this.
Myself I open the back of the HF 1300-4 ohm,unscrew the black plastic cover,remove the foam in install a piece cut to size of 1/2" thick of active carbon pad,its okey couple a month ago I did it to my midranges tube and really like the result on my prof. mk III.
 
Yes we can now fix them. It is a bit different procedure that what his video shows but if you take your time you can figure it out. It was actually pretty easy
 
Mine had a ring of cork at had a glue on it that was holding the old dome in place. I carefully peeled the old one off and then put some contact cement on the cork, but only a little bit, mostly where the wires come through. As there was enough glue on the cork to hold the new dome properly
 
hi,the ring is usually made with hard paper board.cork should be good because the paper one have tendancy to warp (unglue and curve) with change of temperature,but cork is probably a bit ticker material and more stable.
 
HI,I did some pictures as info:
1 - front coles tweeter G 4001,2- front celestion hf 2000,3- both tweeters,4- back of coles tw.,5- celestion hf 1300 back cover with foam, 6- view of foam in front of light,7- view of active carbon in front of light.
 

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