• 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!

Slapshot said:
Yes, these speakers require the 8 ohm version to perform as intended. The pair I have need to be converted to 8 ohm with the proper voice coil.

I just received this message back from my inquiry to the seller:

"Hello, I did not understand your two messages. If you have tweeters under 8 ohms, you must take diaphragms under 8 ohms. If it's 4 ohms then stay under 4 ohms. Regarding the product, the diaphragm is a dome and a coil. cordially"

So it appears that I have the dome and the coil, although the combined unit is not much bigger than a nickel, in diameter, and three times thickness. So it seems I have what would be needed? However, with not being able to find any audio repair shop that will perform the work, I think I have essentially thrown away the $90.00 and still need to find two 8ohm tweeters. :(
Click to expand...

I used the same voice coil for my HF-1300 but it was the 4 ohm version.

Here is the start of my repair. you need to use the original dome. I did this a few years ago but know
I could do it again.

https://audiokarma.org/forums/index...storation-to-begin.701209/page-2#post-9498299


EDIT: Was this the voice coil you bought?

https://www.ebay.com/itm/325140476554?hash=item4bb3e1f28a:g:LnAAAOSwu1VW4Vaf

Athanasios
 
Last edited:
beekeo said:
but also, it does look like Nino sells 8 ohm versions, if that's what was sent you are ok... but yeah, they shouldn't use the photo of an entire tweeter
Click to expand...

I did order the 8ohm version. This is what I received. Is it what I need?

Note that there are two of the parts in the small container. As I mentioned before, each is about the circumference of a nickel, and twice as thick.

upload_2022-5-11_12-51-52.jpeg
 
yeah looks good to me, if you're comfortable with a soldering iron, Nashou's thread will show you what to do!
if you're not comfortable with soldering, I would do some practicing before you work with those teeny wires.

I had almost no experience soldering before I dug into my IMF's, just a quick recap on another set of speakers
but if needed to connect those voicecoil leads to the terminals in the tweeter housing I would feel confident that I wouldn't break anything
 
Slapshot said:
I did order the 8ohm version. This is what I received. Is it what I need?

Note that there are two of the parts in the small container. As I mentioned before, each is about the circumference of a nickel, and twice as thick.

View attachment 2563771
Click to expand...


When I received mine they did not have the clear dome.

And the circumference of nickel might be too small. I would measure the diameter of the
Magnet cone after you remove the existing tweeter cone carefully as you'll need this to mount the voice
coil to. like in this picture.

25724531552_98682b231f_b.jpg


Here you can see the new voice coil glued to the original cone. The front of the cone is black like this
picture

25544771690_f0e15d9a32_b.jpg


This how your tweeter should look with the plastic cover off

25341717552_0f261b9e4b_c.jpg



Then you have to remove the cone from the motor face . Careful not to damage the cone, but the paper spacer can be destroyed as a new one is provided with the new voice coil.

25164566490_83f8573a57_c.jpg



Hope this helps.

So measure the diameter of the new coil and the round slot in the motor ( where the metal cone is)

If the clear dome is on the coil Id ask the seller if he accidentally sent you the HF-2000 coil. But if the diameter is the one you need you may be able to remove the clear dome and just use the coil , of being careful not to deform the new coil.

Athanasios
 
Hi, the replacement kit is just for the coil not the diaphram, Nashou on this forum thread replace one or two on his tls 80, he have remove the old coil from the diaphram and glue the new coil on the old diaphram, all these sellers do not reproduce the original cone diaphram.In your kit you have received it is just the coil ? with gaskets, seems like the dome for the HF2000? I just see Nashou precede me on the answer
 
I've had two very technical, and skilled people, at two different audio repair shops, take a look at what I need, and they don't want to touch it. Seems like my only option is to continue to hope for a set of two complete 8ohm tweeter units to be found by someone, somewhere, that I can purchase.
 
Hi, why don't you contact Athanasios (Nashou66), because he already made the olds coils removed an have install the new ones.Ask if he will be interested to make the job for you, to a certain price,he's pretty nice guy, myself I will try to do it but will not take the risk to do for someone else except me.Yvan.
 
Hi, appendectomy can be serious, glad you are okey, yes Atanasios will fix your problem, so you can finally listen these in perfect order, Yvan
 
Good morning, did you finnish the job, and did you picture the large filter in new condition as well? I'm about to recap my ASL40MKII and am not absolutely sure about where to solder wich new capacitor. Thanks in advance.

dyche01 said:
I haven't seen much about the ALS40 II's around here, so I figured I would share some experiences recapping a pair.

I bought the replacement capacitor kit from Falcon Acoustics, which arrived in a timely fashion but, unfortunately, it was missing two of the necessary 4µF capacitors. I alerted Falcon but have yet to hear back from them.
View attachment 872080
For reference, a full recap of two ALS40 II speakers requires twelve (12) capacitors:
4x 60µF
2x 12µF
2x 6µF
4x 4µF

The crossover network inside each speaker is divided into two boards, a large one located behind the upper bass driver (see below) and a smaller one located on the back of the terminal binding posts. Each of the large boards has four capacitors (2x 60µF and 2x 4µF) while the small boards have two (1x 6µF and 1x 12µF).
View attachment 872083

Here is the board behind the bass driver:
View attachment 872084

This board is attached directly to the white foam, via some sort of brown, crusty glue. The foam peels away from the board relatively easily, especially if you use a plastic putty knife. Since I didn't have enough capacitors to do the entire job right now I didn't peel the boards off completely. Does anybody here have suggestions for an appropriate adhesive to re-attach the boards to the foam? I have some good contact cement and I was thinking of trying that. What do you guys use?

Although I left the big boards alone for now, I did re-cap the small boards and clean the high frequency attenuator switch with contact cleaner. The through holes for the 6 and 12 µF capacitors are marked below.
View attachment 872101

The ALCAP replacements are slightly bigger than the original ELCAP's but they fit just fine.
View attachment 872102

I am not finished with these speakers, but I already notice a BIG difference in the sound. Before cleaning the switches and replacing the capacitors, both tweeters were essentially dead and the overall sound of the speakers was quite dark. Now the sound is much brighter and the authoritative bass that these speakers can pump out is balanced by a clear top end register.
Click to expand...
 
dyche01 said:
No advice on the gluing?
Click to expand...
Does anyone have a list of the capacitor values in the IMF ALS40 speaker crossovers? I have an original pair (not the sla40 mk11) that has two crossover boards glues to the foam inside the cabinet. It is my understanding that the smaller board is to control the low woofer and the larger one is for the mid bass, mid range and tweeter. Mike
 
@taineasy If you expand the post from dyche01 that was quoted by Fredesnaam in the post just before your's, there's a list of the capacitors required for a full recap and which ones are part of which circuit board, plus the tone control board mounted behind the cable terminal cup (with photos)

but the recap kits from Falcon are good and include everything you need -- my experience was good, but it sounds like dyche01 was shorted a pair of 4µF capacitors
 
Hi, I have a pair at home Als40 Mk I, when I come home I let you know the value of capacitors. If it in original state. I never check inside before,Yvan.
 
Hi, on the X-over I see : 2X 60uf , 1X 12uf , 2X 6uf, and where are the speaker's post behind the cover to me look like WIMA 0.1uf 100v
 
Please, someone can give me imf tls 80 mk2 crossover scheme ? i have a pair of imf tls 80 mk2 and i dont have crossovers and i want to make them. Thank you !
 
You must log in or register to reply here.
Back
Top Bottom