A friend of mine and myself got hold of a pair of AUDIOLABOR SPONTAN speaker boxes. The boxes and units are in good shape, but the crossovers were heavily messed with and it appears that not much (if anything) original is there - so, we need to rebuild from scratch.
Searching for info, we found the archive page maitaineb by Mr. Andreas Schubert https://audiolabor.de/index.php/2015-08-05-14-38-29/spontan and basic tech. reference https://audiolabor.de/images/audiolabor/info/spontan-info.pdf From what we;ve understood, it is a first order with cut frequency at 1600 Hz. Not able to get info on the origin/model of the speaker units from them.
' Would appreciate if anyone has any additional data on the units or the original crosover data/schematics.
Searching for info, we found the archive page maitaineb by Mr. Andreas Schubert https://audiolabor.de/index.php/2015-08-05-14-38-29/spontan and basic tech. reference https://audiolabor.de/images/audiolabor/info/spontan-info.pdf From what we;ve understood, it is a first order with cut frequency at 1600 Hz. Not able to get info on the origin/model of the speaker units from them.
' Would appreciate if anyone has any additional data on the units or the original crosover data/schematics.
True (besides the coarse image on the provided link) - they are a rare beast. They are at my friends premises currently - will try to make few shots.
I found this: https://www.google.com/search?q="Audiolabor+Spontan"
Also:
Service for classics - Audio Laboratory
AUDIO LAB
For all generations of devices, starting with the classics such as Rein and Stark and the subsequent models Flink, Kristall and Brilliant, and also the even later Saphir series
contact details removed by Moderation
Also:
Service for classics - Audio Laboratory
AUDIO LAB
For all generations of devices, starting with the classics such as Rein and Stark and the subsequent models Flink, Kristall and Brilliant, and also the even later Saphir series
contact details removed by Moderation
Last edited by a moderator:
I was in contact with Mr Schubert (who was part of Audiolabor) who was kind to point me to the constructor of the speakers; unfortunately, no response to this further inquiry.
I managed finally to get to my friend's place and took few shots of the loudspeakers.
The last image is of the crossover.
On bass/mid I found on the rim engraved "ETON made by ELECTRO ACOUSTIC INDUSTRIES LONDON" on the (back) and "SR142/13" (front).
On the tweater I found no additional info.
The last image is of the crossover.
On bass/mid I found on the rim engraved "ETON made by ELECTRO ACOUSTIC INDUSTRIES LONDON" on the (back) and "SR142/13" (front).
On the tweater I found no additional info.
Attachments
We ususally don’t see Etons much due to the highish prices. The tweeter looks custom-made.
The XO looks like a simple C on the tweeter and a single L on the woofer.
Tweeter wiring (at a minimum) is WAY too fat.
Any indication of what thw inside of the box looks like? OInternal partition? Terminus?
I really dislike those kinds of speaker connections.
dave
The XO looks like a simple C on the tweeter and a single L on the woofer.
Tweeter wiring (at a minimum) is WAY too fat.
Any indication of what thw inside of the box looks like? OInternal partition? Terminus?
I really dislike those kinds of speaker connections.
dave
With regards to the tweeters: I'd bet these are relabeled Dynaudio D21AF with a custom faceplate. The characteristic "s"-shaped strands to the voice coil and the rear shape of the magnet and pole plate are giving them away...
https://img.aussieaudiomart.com/upl...ew-dynaudio-d21-af-tweeters-wanted-to-buy.jpghttps://img.aussieaudiomart.com/upl...ew-dynaudio-d21-af-tweeters-wanted-to-buy.jpg
Of course there could be other modifications to the normal D21 like a different (or no) ferrofluid, but magnet and membrane seem to be the same.
https://img.aussieaudiomart.com/upl...ew-dynaudio-d21-af-tweeters-wanted-to-buy.jpghttps://img.aussieaudiomart.com/upl...ew-dynaudio-d21-af-tweeters-wanted-to-buy.jpg
Of course there could be other modifications to the normal D21 like a different (or no) ferrofluid, but magnet and membrane seem to be the same.
The tweeter in the picture is seriously damaged ... and all old Dynaudio tweeters have ferrofluid that is soaked over time into the fabric/glue joint so the aluminium former is no longer firmly attached to the surround!
Dynaudio in Hamburg/Germany sells replacements but be prepared for shocking prices!
The original D2106 by Dynaudio is still unbeaten til today (precisely machined metal parts by hand) but the glue joint was a weak point of this driver .
By looking at the photo it seems with a 1st order HPF this tweeter was driven way too hard!
Even if you can clean all parts up inside you need fresh ferrofluid (the right amount and type) the distorted surround shape and partly deformed fabric dome means you still get a half-dead driver!
Better buy a similar tweeter and adjust the filter network to your taste! (measurements will help)
Is the other tweeter in better conditions?
Good luck!
Dynaudio in Hamburg/Germany sells replacements but be prepared for shocking prices!
The original D2106 by Dynaudio is still unbeaten til today (precisely machined metal parts by hand) but the glue joint was a weak point of this driver .
By looking at the photo it seems with a 1st order HPF this tweeter was driven way too hard!
Even if you can clean all parts up inside you need fresh ferrofluid (the right amount and type) the distorted surround shape and partly deformed fabric dome means you still get a half-dead driver!
Better buy a similar tweeter and adjust the filter network to your taste! (measurements will help)
Is the other tweeter in better conditions?
Good luck!
Guys, tnx for the contrbution!
That tweeter was under scrutiny already (the other one is in better shape) ... However, from what was communicated, I still have doubts which one it is.
I found another diyaudio thread referencing the mid/bass driver with same "code" and pointing to this as the original one... hopefully it is the one.
This thread was started out of scarce info about the parts contained... and in order to rebuild/adjust the XO (or find a best option for replacement) a proper info about the drivers is needed (catch 22?)... If any replacements are done, we would certainly need to do a more thourough inquiry what to use as a substitute.
(and yes, all the caps will be PP eventually 🙂 )
That tweeter was under scrutiny already (the other one is in better shape) ... However, from what was communicated, I still have doubts which one it is.
I found another diyaudio thread referencing the mid/bass driver with same "code" and pointing to this as the original one... hopefully it is the one.
This thread was started out of scarce info about the parts contained... and in order to rebuild/adjust the XO (or find a best option for replacement) a proper info about the drivers is needed (catch 22?)... If any replacements are done, we would certainly need to do a more thourough inquiry what to use as a substitute.
(and yes, all the caps will be PP eventually 🙂 )
If you are going to make crossovers, better to measure the drivers you have in situe than rely on decades old generic data which doesn't take into account how the drivers have aged.
Re post 8 : the label in the 5th picture shows "6DC335" - this is the designation of the speaker used.
The print on the rubber surround in picture 7 does not show the speaker model, only surround type.
Re the crossover it is a simple first order, L 0,82 mH and C 3,3 μF with an additional resistor of 1 Ω in
series with the tweeter.
The print on the rubber surround in picture 7 does not show the speaker model, only surround type.
Re the crossover it is a simple first order, L 0,82 mH and C 3,3 μF with an additional resistor of 1 Ω in
series with the tweeter.
Tnx. We were aware of the crossover being 1st order - the question was if what we found inside was different from the factory provided. In the end we concluded it was not modified.
Tweeter is a Dynaudio D28AF!
Crossover is 6dB : 1,2mH for woofer and 6,8µF and a Resstor to match the highs to the woofer frequency.
Crossover frequence is 2200Hz .
A newer matching tweeter will be Morel MDT30 or MDT33, but than you need another custommade Tweeter faceplate.
Crossover is 6dB : 1,2mH for woofer and 6,8µF and a Resstor to match the highs to the woofer frequency.
Crossover frequence is 2200Hz .
A newer matching tweeter will be Morel MDT30 or MDT33, but than you need another custommade Tweeter faceplate.
See the difference between D21AF and D28AF ?
This is my Version of Audiolabor Sppontan with same crossover:
The Eton Woofer is no more available, so I took new Audiotechnology 18J52, it matched the hole perfectly!
Tweeter is D28.
This is my Version of Audiolabor Sppontan with same crossover:
The Eton Woofer is no more available, so I took new Audiotechnology 18J52, it matched the hole perfectly!
Tweeter is D28.
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