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IMF owners thread!

HF 1300's have been of all different values over the years. I don't think any of us actually know the accurate story behind the different ohmage units that were fitted at the factory over the years of production. I'm sure some have been changed over the years by their retrospective owners all in the name of "tweaks". Some have been changed because they were blown up and the correct ones weren't available with ease at the time.
 
when measuring the HF 2000 super tweeters with an ohmmeter, in one speaker I it measures 9.3 ohms and in the other one it measures 4.5 ohms, 9.3 seems really odd I have some brand new HF2000 from another project that measure 4.5 ohms so I think I will just install them and see what the sound is like. The HF1300' both are labeled 16 ohms and measure 12.5 the elac mid and woofer both are 8 ohm marked and measure 7.5 ohms. I received all the caps and resistors, all installed now and repaired various issues on the cross overs and hooked up the original internal wiring which was still intact. I tried one speaker with all the repairs completed and compared it to the the other one which was as I received it and certainly the repaired one is much clearer, hope to have the other one completed this weekend then I can compare them to the TLS 80 II I have here, so far it appears the 80's have more of a bass response but it could just be the placement.
 
I think what's written on the tweeter or driver is its impedance. What you're measuring with your dvm is its dc resistance and there will be a difference between the two. The super tweeter that measures differently might possibly have had its voice coil replaced at some time.
I had a short spell with RSPM IV Improved but they didn't do it for me so I stayed with my TLS80s. I'll be interested to read your conclusions.
 
Chops54 said:
I had a short spell with RSPM IV Improved but they didn't do it for me so I stayed with my TLS80s.
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This is why I have both models of these fabulous speakers. I've found that the 80's are better Rock speakers while the Mk IV's are a tad more suited to much more detailed music. The 80's are a far more forgiving system overall.
 
The RSPMs weren't mine. They were on their way to a friend who was moving house so I had the opportunity of listening to them in my main system for several weeks. I thought they were a bit bass light and lacking in detail and even with some serious solid state power I couldn't get them to perform as I thought they should given that they were IMFs flagship loudspeakers at the time. FWIW I find the Elac drive units much more at home in the TDLs. I've owned my Studio 4s getting on for ten years and I replaced them with the IMF TLS80s some six years ago. I always thought the IMFs better balanced in my main system so a second system was built up around the TDLs because I just couldn't part with them. Next year with a bit of luck I'm going to have a go at building a pair of SACM clones. I'll be using KEF B139s and 110s :)
 
Hope you don't mind the photo bomb of IMF ALS30, I found these on ebay, never knew about them, anyway pic and documentation too good not to share.

imf306.jpg imf305.jpg imf304.jpg imf303.jpg imf302.jpg imf30.jpg s-l1600Imf300.jpg s-l1600_imf2.jpg s-l1600_imf.jpg
 
Happy New year and lets hope 2021 is somewhat kinder to us than what we got with 2020.

Everyone that's a true IMF owner, please enjoy your systems over the New Years break.

Cheers,
I-P
 
Hi everybody. I just bought IMF TLS 50 II speakers assuming they were 8ohm but now I have doubts that they are actually 4ohm. I have 2275 Marantz amplifier which pushes 8ohm. Can someone confirm the ohm of the speakers and can I use it on my 2275 without damaging it? Thank you very much (sorry I’m new to this)
 

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Bruno45 said:
Hi everybody. I just bought IMF TLS 50 II speakers assuming they were 8ohm but now I have doubts that they are actually 4ohm. I have 2275 Marantz amplifier which pushes 8ohm. Can someone can confirm the ohm of the speakers and can I use it on my 2275 without damaging it? Thank you very much (sorry I’m new to this)
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Welcome to AK !!!

Great speakers , and yes they are safe to run with the 2275 .

Athanasios
 
I'm out of the market, lol, LOL, at the moment, unless they are local and I can sneak them past my spouse, which I could not do with the Magnapans or McIntosh gear. But I will say, my Super Compacts oddly do not sound good with the McIntosh, the mid range is punchy is a not good way, so they are out of the rotation at the moment.
 
Hello. I am just about to be a returning member of the IMF family of owners. I originally had a pair of the TLS50 MKII's, and used them through the 80's, into the early 90's. I regretted selling them at the time, but always hoped that I might find a pair of nice TLS80's somewhere down the road, which simply didn't happen. Even more fortunately, I just stumbled across a pair of RSPM MKIV's, in great condition, which have been with the same owner since purchased new in 83 and sent him payment yesterday. I have about a 5.5 hour (each way) road trip to pick them up set for next week. The previous owner says they sound as good as new. Is that possible given the age of the caps, drivers, etc?

I would like to do whatever is needed to get these back to optimal performing level. Any recommendations on how best to accomplish that would be appreciated. I know there are "original" caps, and drivers available through Falcon, in the UK. Thanks, very much, for any help with this project.
 
Also, I've seen pictures of these placed on stands. What would be the correct height, and do they need to lean backwards at all? I'm trying to come up with something workable. Thanks for any assistance with this.
 
Slapshot said:
The previous owner says they sound as good as new. Is that possible given the age of the caps, drivers, etc?
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Isn't that what any seller would say ?

I'm going to ruffle a few feathers here and say that this Capacitor replacement thing is a bit of a electronics scam. Yes some will deteriorate due to usage but if they haven't been driven hard you'll probably find that they'll still be ok.

I did the job on mine and then had most of the removed caps tested with them all still being within spec. So for me it was really a waste of money, time and effort, but regardless I know I'll never have to do them ever again in my lifetime.

With yours being of 1983 vintage ("Improved") they would be one of the very last ones made and as such they should have the full line up of Elac drivers opposed to the KEF / Celestion combination. The only negative thing there is, is that the tweeters are "ferro fluid" filled and many times they end up drying up over time, but if you don't drive them hard then this shouldn't be too much of a problem for you.

BTW welcome back to the fold.
 
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