Yvan_donald
Well-Known Member
Hi, yes that's the woofer of the CM3. If you look on internet IMF CM3 revient or specs, some pictures will come out and show you the 8/30 be the woofer use an the CM3, yvan.
IMF owners thread!
- Thread starter canuckaudiog
- Start date
Yvan_donald
Well-Known Member
Hi, in StereoNET. IMF CM3 new (old)speaker's from garage sell , march 19,2016.
Hello everyone, after a long time I am here again.
I own a couple of Professional Monitor speakers and plan to do a recap this year.
I am still searching for the crossover schematic.
The best address to order the parts is probably https://www.falconacoustics.co.uk/l...n-line-monitor-replacement-capacitor-set.html
Does anyone have experience with shipping to Austria / Germany?
Or does anyone have a supplier within the EU?
I own a couple of Professional Monitor speakers and plan to do a recap this year.
I am still searching for the crossover schematic.
The best address to order the parts is probably https://www.falconacoustics.co.uk/l...n-line-monitor-replacement-capacitor-set.html
Does anyone have experience with shipping to Austria / Germany?
Or does anyone have a supplier within the EU?
Attachments
Any suggestions as to how I might go about determining whether my rubber surrounds are dried out?
@AndreasH if you pull the crossovers everything should be labeled for you to order the components from an EU supplier. I have no idea what the import situation might be for you, but my order from Falcon to the US was no trouble and not expensive (at least for the capacitors).
@JB1962 are you concerned about the rubber surrounds on the woofers? (Looks like KEF?) do they move freely on high bass songs?
@JB1962 are you concerned about the rubber surrounds on the woofers? (Looks like KEF?) do they move freely on high bass songs?
I had a local speaker shop run a sweep on one of my CM3'S after I installed the replacement midrange drivers and new xover's. Though the (now defunct ) IMF website says that the CM3'S dig down to 29 Hz, mine dropped off sharply at just above 100 Hz, by as much as 20 db's. Even if IMF fudged the numbers a bit, 100 Hz is a long way from their claimed 29 Hz. If they dug down to even 40-50 Hz I probably wouldn't question it, but they fall short of 100 Hz.
It was suggested that perhaps the surrounds might be dried out? Of course I'm curious if this is something others have had issues with and how would I be able to determine if this is the case? They will of course move on high bass songs but then again I'm not sure how freely. They've been powered mainly by a Hafler P500 amplifier (255 WPC) and occasionally by a 700+ WPC into 8 Ohm karaoke amplifier
In response to the question of 'do they move freely?', there is definitely a firm resistance when pushing on the cone. My speaker guy looked at a photo of one of woofers and said it looks as though if was pushed out, possible voice coil damage.
My next move is to get woofers gone through! These speakers just keep sounding better and it appears that there's still room for improvement. They'd be in the shop now but I just acquired this:
The Tascam MD-350
There goes my speaker budget for a couple weeks. No matter, I will get these CM3'S back in order. I still think that these are quite capable of being my best speakers.
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Hello,
How to explain the circuit i found inside my spekers..?
0 (zero) resistrors and different capacitors while plate is signed IMF Super Compact Mark II.
Coils are mesured and maight be that I got wrong values.
Despite... wich circuit is correct?
Thanks for any advice!
Hi, in my opinion it is not touched - except my writings on PCB.
I found similar pictures in the internet, without resistor and one with resistor fixed between the wholes i marked in red - but the model of speaker was not indicated (at pictures only parts are visable).
... become lost discovering the IMF schema is so different.
for example here IMF PCB but looks incomplete ?
https://www.stereonet.com/forums/topic/283764-vintage-speaker-parts-clearance-kef-imf/
I found similar pictures in the internet, without resistor and one with resistor fixed between the wholes i marked in red - but the model of speaker was not indicated (at pictures only parts are visable).
... become lost discovering the IMF schema is so different.
for example here IMF PCB but looks incomplete ?
https://www.stereonet.com/forums/topic/283764-vintage-speaker-parts-clearance-kef-imf/
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Som
Apparently some IMF crossovers are in series. I know very little about crossovers really, but now I at least know enough to know that I don't know. I have built xover's from scratch before but didn't know what I was doing. They weren't made with any particular speaker parameters in mind, just only what crossover points.
I got that schematic from the place I bought the replacement midrange drivers and crossover parts from. I had a local speaker guy build the CM3 xover's for me because I wanted to be sure they were done right the first time. He's the guy who told me that these were in series.
Wish I could be of more help, good luck with your project. You could email Jerry at Falcon Acoustics and ask him any questions you have. Sometimes it takes a while to get back with you but he has always so far. He seems to be the only one around that knows some of the IMF models
Apparently some IMF crossovers are in series. I know very little about crossovers really, but now I at least know enough to know that I don't know. I have built xover's from scratch before but didn't know what I was doing. They weren't made with any particular speaker parameters in mind, just only what crossover points.
I got that schematic from the place I bought the replacement midrange drivers and crossover parts from. I had a local speaker guy build the CM3 xover's for me because I wanted to be sure they were done right the first time. He's the guy who told me that these were in series.
Wish I could be of more help, good luck with your project. You could email Jerry at Falcon Acoustics and ask him any questions you have. Sometimes it takes a while to get back with you but he has always so far. He seems to be the only one around that knows some of the IMF models
I never had the original xover's for my CM3'S so I don't know what they looked like.
https://audiokarma.org/forums/index.php?threads/imf-als-30-advice.376012/
that thread has a decent amount of information about the model in general.
If the speakers you linked to are complete - all original components and in good working order, I think £100 would be quite a good price?
Falcon is your first place to check for replacement woofers and tweeters, some of them are expensive so you need to consider that (I replaced 7 out of 8 drivers in my TLS 50's, and while I am very happy with how they sound, it was not cheap!)
they also have your crossover components as those will need to be replaced if they're original (not too expensive comparatively)
judging by completed sales listed on https://www.hifishark.com/search?q=imf+als+30 100 pounds is below the going rate in other parts of Europe, but I'm not sure how regional scarcity and import taxes plays into that.
that thread has a decent amount of information about the model in general.
If the speakers you linked to are complete - all original components and in good working order, I think £100 would be quite a good price?
Falcon is your first place to check for replacement woofers and tweeters, some of them are expensive so you need to consider that (I replaced 7 out of 8 drivers in my TLS 50's, and while I am very happy with how they sound, it was not cheap!)
they also have your crossover components as those will need to be replaced if they're original (not too expensive comparatively)
judging by completed sales listed on https://www.hifishark.com/search?q=imf+als+30 100 pounds is below the going rate in other parts of Europe, but I'm not sure how regional scarcity and import taxes plays into that.
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c-atle-79bay
Super Member
I’ve had both. Still have the super compacts. But the cm3 was strong in detail and imaging the super compact is more musical. The cm3 also had an authority to it, hard to describe but it grabbed my attention. They were trashed speakers so that was a big part of the selling, that and politics! They went to the purchaser of my tdl reference standards. Hope he liked them.
