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IMF owners thread!

HI,as a question,did someone have compare the standard IMF Prof. MK IV to the RSPM MK IV? I know an Audio store owner who have a standard Prof. MK IV and he have tell me,these speaker have been the best one he own.Yvan
 
Yvan_donald said:
HI,as a question,did someone have compare the standard IMF Prof. MK IV to the RSPM MK IV? I know an Audio store owner who have a standard Prof. MK IV and he have tell me,these speaker have been the best one he own.Yvan
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Yvan, do you have a picture of the standard Prof. Mk. IV? I'd like to see how it physically differs from the RSPM series. Also, do you have cabinet measurements of the standard vs RSPM?
 
Just so we are on the same page, by IMF Pro Mk IV, are you referring to the IMF Professional Monitor that came after the TLS 80 IIa (and is the replacement of)?
 
For all those IMF collectors out there. Our love for the brand are getting on now approaching 40 years old. A recap is a must. Take a look at what happens to the original Elcap caps.

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hi,if it relate the X-over of the MK IV, I just download lately,probably yes.Canuck you own previously a pair of Tls 80 MK II,did the X-over was similar to my pictures or the X-over with elongate beige PCB with (4) inductors like we usually refer for it.IIRC the last version of Prof. MK III with foam inside who own Stephane from IMF Website was denominate" reference standard IMF" on a chrome plate in the front.So the Standard Prof.MK IV and standard Prof.MK VII when down size to make place to the RSPM.Yvan
 
hi, Mech986 the dimension look the same as the TLS-80-II with the stand 41 3/4" X 18"wide X 15 3/4" deep,only 87pounds including stands approx. 4" high for the standard MK IV and standard MK VII.Frequency 19 hz. to 40 khz.,so the standard prof.
The picture is Prof.MK VII same has MK IV but inverse mid and TW.STW,YvanIMF Prof. Monitors.jpg
 
Hi, too me look like IMF could not continue produce the standard prof. full size. It will have been in direct conflict with the RSPM line.I like to see some standard Prof.MK IV full size with is X-over.IIRC than why some peoples who have work at IMF was saying they didn't like the new direction, after the MK III.Love IMF just to say, Yvan
 
Yvan_donald said:
hi,if it relate the X-over of the MK IV, I just download lately,probably yes.Canuck you own previously a pair of Tls 80 MK II,did the X-over was similar to my pictures or the X-over with elongate beige PCB with (4) inductors like we usually refer for it.IIRC the last version of Prof. MK III with foam inside who own Stephane from IMF Website was denominate" reference standard IMF" on a chrome plate in the front.So the Standard Prof.MK IV and standard Prof.MK VII when down size to make place to the RSPM.Yvan
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Hey Yvan,

Yes, the TLS 80 II had a beige PCB. Not sure on the number of inductors, 4 sounds right but I could be wrong. I'm sure a picture could easily be found.

I'm not sure what you mean by "Standard Professional Mk IV" and "Professional Mk VII"? There was no such model, only the Reference Standard Professional Monitor Mk IV, then the Mk IV Improved, then there was some inbetween model.. and then the Mk VII. Then below that, was the TLS 80 II, TLS 80 IIa, then the Professional Monitor. I don't ever recall there being a "Professional Monitor Mk IV".. not sure what you mean by this? Do you mean this model:

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If you do that is called the Professional Monitor, it never had a Mk IV or Mk VII name.

The RSPM Mk VII is the model with the silver plate on the bottom, just like the RSPM Mk IV which had the black metal plate on the bottom.
 
hi,the one with regular midranges under the TW,same as this call professional monitor.without the big plate at the bottom.People use to call them MK IV or MK VII relate to the RSPM.And tell me ,you or other's owner of RSPM,do they play with the adjustments control on theirs speakers or mostly everyone keep it flat?Yvan
 
Canuck,you are right and they should not be call in the Professional serie,it is confusing because IMF start to use the term professional monitor for the Tls 80 MK II,Yvan.
 
I have a set of TLS 80's and a set of TLS 80II driven by a McIntosh 6500 amp, I have had these speakers since the early 80's and at that time I drove them with a McIntosh 2500 amp It was a bit too much for them with 1000 watts and due to a party my daughter had someone cranked it and of course with that much power there was a lot of damage. Burned holes in the crossovers of 3 of the 4 speakers and on one cabinet 3 out of 4 speakers had open coils. I managed to find some parts from various sources including 2 TLS 80II cross over boards in decent shape which I replaced in the TLS 80's. The HF 1300 celestion tweeters I received were 16 ohm large magnet I used one of them but I find the sound is very harsh from that speaker I now managed to find the correct HF 1300 in 4 ohm small magnet which are on the way to me now. One thing I did notice is the HF1300 used in the TLS80II is the 4 ohm large magnet where as in the TLS 80 it's the small magnet?? Not sure how much difference this would make. I recapped the cross overs with the kits from falcon which really made a difference. It's nice to have my IMF's back working again and the sound is still amazing.
 
Hi should be 8 ohm,the tweeter in the MK I in the black plastic with ceramic magnet,but with the new X-over Tls MK II should use 16 ohm tweeter in the steel cup like hf 2000.Some pictures will be good to see,do you have the old Kef B139 racetrack in the MK I.Do you still have the original X-over of Tls 80?Yvan
 
Hi,on my Prof MK III should be the same hf1300 like the Tls 80 mk I,I will ckeck.Me I have like 20 different HF 1300 with ceramic magnet and many mk II hf 1300 with steel like HF 2000,some 4 ohm,8 ohm,15-16 ohm,with big flange and small flange like tls 80 mk II,RSPM mk IV. Yvan.
 
all 4 of my HF2000's are 4 ohm and all 4 of the HF 1300's are 4 ohm the 2 HF1300's in the II's have the large metal magnet the HF 1300's in the 80's have the small plastic covers on them. I have had these since the early 80's the first set I got from a friend who bought them new and the second set the original owner had them on consignment at Audio arc in Edmonton so they haven't been messed with.
 
I am overseas at the moment so don't have access to them. I am still using the original 139's and they work fine I got a couple of replacement 139's for spare but they are different so I didn't try them I still have them in a box, I also got some spare Kef 110's for the mid ranges but again they are different the magnets on the back are quite a bit different than the ones I have. I managed to repair mine so I didn't have to use them again I have them as back up's I also managed to find 3 HF 2000 brand new in the original boxes I used one of them and it works perfect.
 
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