• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

IMF owners thread!

IMF_Pioneer said:
And those are the very best and last variant of the ALS-40 as well, do you think I can find a set of those over here in Australia ????................... no way !
Click to expand...
After playing around with both sets of speakers, trying different placements and such, I actually prefer the CM2's. They obviously don't have as many mids as the ALS 40's. But the bass is much tighter, and everything just sounds very precise. Also the stereo imaging is excellent, especially with them lying down - I've been listening to a lot of classical music lately, and on the better recordings I can almost place each instrument in the pit when I close my eyes.
 
K_50 said:
After playing around with both sets of speakers, trying different placements and such, I actually prefer the CM2's. They obviously don't have as many mids as the ALS 40's. But the bass is much tighter, and everything just sounds very precise. Also the stereo imaging is excellent, especially with them lying down - I've been listening to a lot of classical music lately, and on the better recordings I can almost place each instrument in the pit when I close my eyes.
Click to expand...

I agree but I DO MISS the mids .

Athanasios
 
Nashou66 said:
I agree but I DO MISS the mids .

Athanasios
Click to expand...

I do too, a little. But there is just something about the amount of detail I get from the CM2's when I hit the right positioning, and sit in the sweet spot, that's quite addictive. So I think I'm going to sell the ALS 40's, and put the money towards some proper stands for the CM2's.
 
If you were somewhat closer to me I'd buy your 40's in a heartbeat, but sadly sending larger items like this internationally is just cost prohibitive nowadays..............unless your a multi-millionaire.
 
Because AK is huge, just wanted to make sure this person gets all the help they can, and I'm interested in what they are. :)

stg5clinger said:
I picked up a pair of IMF speakers at a garage sale today just because they looked cool and I had never seen them before. Plugged them in and they sound pretty amazing. No markings on them and unfortunately one of the grills has some pretty extensive water stains. I attached a couple of pictures here. Can anyone help me identify these and give some tips on how to remove the grills? Also looking for some hints on trying to get the grills cleaned up. The fabric looks pretty fragile. Thx.
Click to expand...

https://audiokarma.org/forums/index.php?threads/imf-speakers-mystery.935366/#post-14238514
 
c-atle-79bay said:
Because AK is huge, just wanted to make sure this person gets all the help they can, and I'm interested in what they are.
Click to expand...

Thanks for that, but I strongly feel these have absolutely nothing to do with the brand of IMF Electronics that we know of and discuss here on this thread.

These were built way before the IMF branding that Bud Fried gave John Wrights speakers in New York.

If anyone knows anything different they'd be re-writing history I'd say, but in saying that if anyone has concrete proof I'd love to hear it.
 
Last edited:
Not meaning to offend IMF owners by this question so forgive me in advance if I do.

I have a pair of Fried R4 speakers which I would like to think are kissing cousins to IMF speakers. One of the original 10" woofers is bad as well one of the 5" midrange drivers. Are there any IMF drivers that might be a good equivalent that I could use to get them closer to original spec?
 
Nashou66 said:
Have you done this yet?
Click to expand...

Yes you are right I should get them out. I guess I've had plenty of other projects on the go, not all Hi-Fi orientated I might add.

Currently restoring 2 beautiful timber desks for my kids, but I'm getting closer to the end of those and will have to get the CM2's out I guess.
 
I just picked up a pair of the IMF RSPM MKIV with the field improved speakers installed. Someone had done a bunch of changes and just butchered the crossovers I was able to get a material list for the capacitors and resistors from Falcon and they are on the way I have a crossover schematic and have identified the components but what I need is the color coding of the original wiring as someone had replaced the internal wiring with some brown #12 awg extension cord wiring and its a mess I have no idea of the polarity is correct even on the supply to the cross over so a photo of the back of the cross over board showing the wiring would be a big help as well some jumpers have been put in place on the slope and tilt switches, I am not sure if these should be there or not
thanks for your help
canuckaudiog said:
Welcome to the IMF Owners thread. Pull up a chair and stay a while. :beerchug:

There's a few of us kicking around here on AK. Of course you all know I'm a big IMF fan.

I've put together a bunch of resources for restoring IMF speakers in a post here.

I currently own the following:

IMF Reference Standard Professional Monitor Mk IV
2x IMF Super Compact, one will soon be modded to be like an IMF Super Compact II

I have owned the IMF TLS 50 II and IMF TLS 80 II in the past.

So what do you guys have or have owned in the past? Share your thoughts on this oddball brand as well. And of course, put up some pictures. :yes:

Here is a shot of when I had both the IMF TLS 50 II and IMF TLS 80 II:


You can see some of the non-original drivers in the second shot there, notably the square tweeter and the midrange driver. The bass woofer and tweeter are original. In the first shot you can see the crossover board of the IMF TLS 80 II that wasn't working, so this was basically the day I got the IMF TLS 80 II's.

Here's a shot of the TLS 50 II when I got original/replacement drivers:


Then I sold the IMF TLS 50 II's shortly after, and got my hands on the real prize.

Here they are in their original boxes, being hauled back to where they reside now:
dsc01127b.jpg


And here they are unboxed, at home:

Next to the IMF TLS 80 II (yeah, I thought that was a big speaker!):

The box label:

The distributor for IMF speakers in Canada was in Quebec. :)

Then, an AKer gave me this set of IMF Super Compacts to me for free (yes, I couldn't believe it). One tweeter was shot and they were completely original, but after $200 in parts and some elbow grease I got them back to factory spec:

Picture removed due to being huge!! will repost

And then my latest IMF pick-up, another set of IMF Super Compacts from another AKer. Price wasn't as good as the first set but still very good. :)

DSC01970.JPG


The above isn't my picture, but the AKer's picture of them (hope ya don't mind :) ). When they come home, hopefully this week or the next, I'll put up some of my own pictures.

So, share your IMF's. :)
Click to expand...
 

Attachments

  • IMG_4545.jpg
    IMG_4545.jpg
    103.5 KB · Views: 19
Would you happen to have a photo of the front and back of the cross over boards and the wiring connections from the back of the board to the speakers I am trying to restore a set of IMF RSPM MKiV improved


IMF_Pioneer said:
I must then get mine out of the packing box and give them a whirl I suppose.
Click to expand...
 
Wow this really Helpful I just picked up a set of the RSPM MKIV which looks like they have the improved Elac speakers mounted someone had added 35 extra capacitors and really messed up the soldering and the wiring I have new caps and resistors coming from Falcon to replace them. I have 2 sets of TLS 80 II that I already re capped, looking forward to getting these sorted out as right now they don't sound near as good as the TLS 80II's (no Bass) image2.jpeg image4.jpeg

petervv said:
I installed the capacitor kit from Falcon today:

View attachment 1029009

View attachment 1029010

I checked all old and new caps on my Philips PM6304 RCL meter at 1kHz, to my surprise none of the old caps were drifted more than 10% and the ESR is only very slightly higher than the new caps.
Difference is sound is minimal, maybe a bit more detail and overall a bit brighter, which I don't necessarily think is a good thing, I'll let them run in before final judgement.

I inserted the component values on the schematic and the component designators on a photo of the PCB, maybe helpful for others:

View attachment 1029011

View attachment 1029012

As you can see in the schematic, my HF1300's are 4 Ohm, and my HF2000 are 8 Ohm, I have asked Mr. Bloomfield from Falcon if these are correct.
The information I found on various forums is not really consistent, I found someone saying the first series of the RSPM Mk IV had 8 Ohm 1300's and 2000's but IMF shipped later Mk IV's with 4 ohm 1300's and 6 ohm 2000's without changing the filter.
I also found someone saying that not all Mk IV's sound the same, this could be a reason.

I'll report the answer from Falcon.

Next up are stands, I will be back!

regards, Peter
Click to expand...
 
OMG !............... you see what happened during amateur hour one rainy day.

If I were you I'd just remove all that stuff and return them back to factory original.
 
yes that is what I am doing, one question though do you have the ohm values for the speakers that should be installed as the HF1300 are the 16ohm version and it my TLS 80 they have 4 ohm??
 
it looks like thats what I have in mine but the 1300 have a 16 ohm sticker on them would this be the correct one as I can see someone has changed a lot of things in these speakers


IMF_Pioneer said:
Hello Luca,

Your Mk IV is exactly the same variant as mine which is probably the best version of this speaker. This is basically the Mk V (unofficially) which uses the following driver units,

128/20 Elac Bass
5/36 Elac Midrange
HF1300 Celestion Tweeter
HF2000 Celestion Super Tweeter

I've always preferred the Celestion top end opposed to the Elac drivers that eventually replaced the Celestion units and then made the speaker become the Mk VI (unofficially ofcourse). There were also minor changes made to the Crossover board during the evolution process of this fine speaker system that still stands the test of time. Most of the changes were capacitor values. That's one of the reasons why you should always buy the replacement kits from Jerry at Falcon Acoustics in England. With these kits you'll get all the capacitor values (with a few extra in case yours had the slightly different values installed) to exactly replace yours and thus keep the specifications exactly as they were when they left the IMF Factory.

Cheers.
Click to expand...
 
You must log in or register to reply here.
Back
Top Bottom