IMF owners thread!
- Thread starter canuckaudiog
- Start date
I just spoke to the owner of the speakers to arrange my pickup on Wednesday. he said they are actually from 1982, had typoed 1983, and just wanted to be upfront about all information.
Does this still mean the same ELAC speakers would have been utilized? I've heard the KEF/Celestion combination was the most preferred? Should I consider replacing the bass driver and the tweeters with those from Falcon for optimal performance?
Does this still mean the same ELAC speakers would have been utilized? I've heard the KEF/Celestion combination was the most preferred? Should I consider replacing the bass driver and the tweeters with those from Falcon for optimal performance?
IMF_Pioneer
Super Member
Hi SS,
At 1982 I'd say that they still may have the full contingent of Elac drivers. Photos would certainly confirm that.
Many feel that the KEF / Celestion combination was the best, but I feel that the first incarnation of the "Improveds" with the Elac bottom end (128/20 and 5/36) with the Celestion top end (HF-1300 and HF-2000) was the best variant. In saying that it's all personal opinion as far as I'm concerned. I've just never been a great fan of the Elac TW-1400 and TW-2100 as they were originally ferro fluid filled but eventually dry out. Many years ago I listened to a set of Full Elac Mk IV's and something just didn't sound right to me, thus I turned them down and stayed with the ones I still have.
As far as replacing drivers is concerned, I would just use them as they are for time being and evaluate before creating problems that really aren't there. If they are fitted with the 128/20 bass driver there will be no real advantage to buying any new replacements.
Again I can't stress how important putting up images will be for evaluation.
Best of luck and make sure you protect the timber work really well while transporting as there are no "REPLACEMENT" cabinets available.
At 1982 I'd say that they still may have the full contingent of Elac drivers. Photos would certainly confirm that.
Many feel that the KEF / Celestion combination was the best, but I feel that the first incarnation of the "Improveds" with the Elac bottom end (128/20 and 5/36) with the Celestion top end (HF-1300 and HF-2000) was the best variant. In saying that it's all personal opinion as far as I'm concerned. I've just never been a great fan of the Elac TW-1400 and TW-2100 as they were originally ferro fluid filled but eventually dry out. Many years ago I listened to a set of Full Elac Mk IV's and something just didn't sound right to me, thus I turned them down and stayed with the ones I still have.
As far as replacing drivers is concerned, I would just use them as they are for time being and evaluate before creating problems that really aren't there. If they are fitted with the 128/20 bass driver there will be no real advantage to buying any new replacements.
Again I can't stress how important putting up images will be for evaluation.
Best of luck and make sure you protect the timber work really well while transporting as there are no "REPLACEMENT" cabinets available.
Hello everyone,
I recently picked up a pair of IMF TLS50 Mk2a (including the stands) in excellent exterior condition.
The speakers look very good and everything in them are original.
Unfortunately they have a couple of problems and wanted your opinions..
The square tweeters (HD12x8D25) on both speakers are dead, they measure open circuit so both needs to be replaced.
I guess Falcon Acoustics AUDAX TW025A0 would be the best option?
https://www.falconacoustics.co.uk/audax-hd12x8d25-12x8-tweeter.html
The surrounds on both 4" mids are beyond their life (as expected).
Would you rather refoam the original mids or is it better to replace with Monacor MSH-115?
https://www.falconacoustics.co.uk/monacor-msh-115-imf-midrange.html
Thirdly, does anyone know if the caps on the crossover board are the same on Mk2 and Mk2a?
Thanks.
/j
I recently picked up a pair of IMF TLS50 Mk2a (including the stands) in excellent exterior condition.
The speakers look very good and everything in them are original.
Unfortunately they have a couple of problems and wanted your opinions..
The square tweeters (HD12x8D25) on both speakers are dead, they measure open circuit so both needs to be replaced.
I guess Falcon Acoustics AUDAX TW025A0 would be the best option?
https://www.falconacoustics.co.uk/audax-hd12x8d25-12x8-tweeter.html
The surrounds on both 4" mids are beyond their life (as expected).
Would you rather refoam the original mids or is it better to replace with Monacor MSH-115?
https://www.falconacoustics.co.uk/monacor-msh-115-imf-midrange.html
Thirdly, does anyone know if the caps on the crossover board are the same on Mk2 and Mk2a?
Thanks.
/j
IMF_Pioneer
Super Member
Yes I would purchase new Audax units from Jerry, but as far as the Midranges are concerned I would get the surrounds replaced and not replace the entire driver.
On another note I'd say if the actual voice coils are fried on the Audax's that they could probably be repaired. I know a good bloke in the UK that used to work for Celestion and he repairs tweeters all the time. He's also on here. "Ditton Works" is his ID. Look him up on the Celestion Owners thread. He could also do your surrounds as well I'd say as he does that sort of stuff all the time and it wouldn't cost much more to send 4 drivers compared to two.
On another note I'd say if the actual voice coils are fried on the Audax's that they could probably be repaired. I know a good bloke in the UK that used to work for Celestion and he repairs tweeters all the time. He's also on here. "Ditton Works" is his ID. Look him up on the Celestion Owners thread. He could also do your surrounds as well I'd say as he does that sort of stuff all the time and it wouldn't cost much more to send 4 drivers compared to two.
Hello AK,
First time poster here. I'm trying to bring a set of TLS 80 Mark II's back to life. It looks to me based on going through this thread that someone has changed the original crossovers. What's confusing is the board used says IMF on it, but it doesn't look like the crossovers that I was able to find here. I've attached pictures of the crossover--its in two parts. Can anyone confirm that these are or are not the original crossovers for this version of the TLS 80 Mark II. As I said, I would like to restore these to original and have purchased the TLS 80 Mark II recap kit from Falcon Acoustics. I found a schematic for the crossover in the thread, but it is missing the specifications for the Inductors: L1 (Pink Dot), L2 (Green Dot) L3 (Yellow Dot) L4 (Peach? Dot).
Can anyone DM or post here the specifications for the inductors or post here. I could not find these in the thread.
Does anyone know of a source for replacement inductors that will fit the original schematic PCB board? I'm reposting the schematic and crossover that I think is the correct one. Thanks to the original shooter.
First time poster here. I'm trying to bring a set of TLS 80 Mark II's back to life. It looks to me based on going through this thread that someone has changed the original crossovers. What's confusing is the board used says IMF on it, but it doesn't look like the crossovers that I was able to find here. I've attached pictures of the crossover--its in two parts. Can anyone confirm that these are or are not the original crossovers for this version of the TLS 80 Mark II. As I said, I would like to restore these to original and have purchased the TLS 80 Mark II recap kit from Falcon Acoustics. I found a schematic for the crossover in the thread, but it is missing the specifications for the Inductors: L1 (Pink Dot), L2 (Green Dot) L3 (Yellow Dot) L4 (Peach? Dot).
Can anyone DM or post here the specifications for the inductors or post here. I could not find these in the thread.
Does anyone know of a source for replacement inductors that will fit the original schematic PCB board? I'm reposting the schematic and crossover that I think is the correct one. Thanks to the original shooter.
Attachments
If anyone is curious...
Looking in a microscope, the coil wire is clearly broken, same location on both tweeters.
The wire comes from the terminal, makes a u-turn and begins the coil.
Right where the u-turn begins, the wire is broken.
From the other side:
/j
IMF_Pioneer
Super Member
Those are repairable if given to the right person that's good at microsurgery. Have you contacted member "Ditton Works" here on AK at all ?
Hi Thana
jon.Just to point out that I don't think you have the correct crossover diagram. Please see what I believe is the correct version and that my speakers are within a few hundred of yours. Look closely at the serial number.
I have also ordered a replacement set of capacitors from Falcon acoustics and hope to be replacing the old ones too.
In the meantime does anyone happen to know DEFINITIVELY what the impedance of the HF1300 and HF2000 are supposed to be for the IMF TLS80 mk2 with the KEF and Celstion drivers as indicated, ie NOT the Mk2A which used IMF's own drivers madly ELAC.
According to Jerry at Falcon they are both 8 ohms but at least one "reliable" internet source suggests 16 ohm for theHF1300s.
Best Nick.
Just to add that I meant to reference the posts 1999 to 2001 from IMF-Pioneer and Mcimages and even though they refer to the RSPM Mk4 with regard to driver impedance I believe that the TLS80mk 2 is the same but perhaps someone could correct me.
I hope to get into my pair shortly which appear to be unmolested and will measure the impedance or at least series resistance of the tweeters and report back.
Cheers
IMF_Pioneer
Super Member
Hi Blug,
The TLS-80's would be no different to the Mk IV's as they used the same drivers throughout their lifespan. I've always felt that the HF-1300 was the one that was substituted with variants of either 8 or 16 Ohms over time and availability. Technically speaking they should have all drivers at 8 ohms or thereabouts, but at times this was probably just not possible. Remembering that Celestion were making OEM drivers for many companies and not just IMF. It wasn't until the Elac business partnership came along that IMF finally had full control over driver production.
The TLS-80's would be no different to the Mk IV's as they used the same drivers throughout their lifespan. I've always felt that the HF-1300 was the one that was substituted with variants of either 8 or 16 Ohms over time and availability. Technically speaking they should have all drivers at 8 ohms or thereabouts, but at times this was probably just not possible. Remembering that Celestion were making OEM drivers for many companies and not just IMF. It wasn't until the Elac business partnership came along that IMF finally had full control over driver production.
IMF_Pioneer
Super Member
Unfortunately there are no direct replacements available new for these drivers, so your only option is to keep an eye out on eBay as these actual ones do come up every now and again. The other option is to replace both units with Elac drivers from the Super Compact series which are pretty close specification wise but a perfect frame fit or even a set of KEF B200 units for time being until you can find a correct unit.
On the flip side depending on where you are there are quite a few cluey people out there that will rewind a new voice coil for your original driver or alternatively repair what's actually gone wrong with it. I had an identical unit repaired by Boyd at Total Recoil here in Melbourne, Australia a couple of years ago.
On the flip side depending on where you are there are quite a few cluey people out there that will rewind a new voice coil for your original driver or alternatively repair what's actually gone wrong with it. I had an identical unit repaired by Boyd at Total Recoil here in Melbourne, Australia a couple of years ago.
Yvan_donald
Well-Known Member
Hi I have one depending of the model you havel Yvan.
Yvan_donald
Well-Known Member
Hi,please unscrew the faulty woofer to see the model you have.Yvan.
Yvan_donald
Well-Known Member
Hi, yes it have the ribs, but IMF use many different woofers 8/22R, 8/28R, 8/30R , I have to check,I think I have 8/28R or 8/30R. The R is for Ribs,please verify to be shure is the same. I'm living in Canada, you? Yvan.