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ARCHIVED FORUM -- March 2012 to February 2022
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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

S 45-2 bass driver issue

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This post has 56 Replies | 3 Followers

Dillen
Top 10 Contributor
Copenhagen / Denmark
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Dillen replied on Mon, Dec 24 2012 11:46 AM

Very nice work indeed ! Yes - thumbs up
I always preferred to repair rather than replace.

Martin

GlennB
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GlennB replied on Mon, Dec 24 2012 11:58 AM
Congratulations :-)
Søren Mexico
Top 10 Contributor
Mexico City
Posts 6,411
OFFLINE
Bronze Member

Dillen:
I always preferred to repair rather than replace.

Thank you Orava, I will see my P45s (Tex-Mex Smile) speakers Wednesday or Thursday, will report back with condition, top job you did here, congratulation.

Collecting Vintage B&O is not a hobby, its a lifestyle.

zeckomat
Not Ranked
Austria
Posts 1
OFFLINE
Bronze Member
zeckomat replied on Tue, Feb 12 2013 8:36 AM

Good job! I really thought there's no way 'round seeking a new woofer. I will try that with my non-woofing S45-2 soon.

 

Orava
Top 100 Contributor
Finland
Posts 991
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Bronze Member
Orava replied on Tue, Feb 12 2013 10:26 AM

Good luck. Really, it is not rocket science, but requies handy work. Yes - thumbs up

 blah-blah and photographs as needed

freddy63
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near Dijon-Burgandy-France
Posts 35
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freddy63 replied on Thu, Feb 14 2013 7:24 PM

I'm impressed, i wish i had read a thread like this a few years ago. I might have saved my S45 woofer !

I am curious about the types of glue used.

The white glue looks like wood glue, can anyone explaine what types of glue are used on the dust-cap ? and spider/chassis ? and rubber suspention/chassis ?

Frédéric

 

Orava
Top 100 Contributor
Finland
Posts 991
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Bronze Member
Orava replied on Fri, Feb 15 2013 7:28 AM

freddy63:

I am curious about the types of glue used.

The white glue looks like wood glue, can anyone explaine what types of glue are used on the dust-cap ? and spider/chassis ? and rubber suspention/chassis ?

Frédéric

 

Hi

I used Hempels Epoxy (danishSmile) on magnets, it is slow hardening and never let me down, I also use it on my boat so has to be good. And yes the white glue is ordinary good quality PVA-glue, someones might shake threir heads, but I didn't found reason why not, in these places it doenst, in fact it cant be flexible like when glueing surroundings. On these rubber surroundings I used Danalim(again danish) contact-glue, not like contact, but immedially wet-glueing.

 blah-blah and photographs as needed

freddy63
Not Ranked
near Dijon-Burgandy-France
Posts 35
OFFLINE
Bronze Member
freddy63 replied on Fri, Feb 15 2013 4:42 PM

Thank you for making that clear.

I looked up Danalim glue, the yellow, universal adhesive 300, seems to be what you used.

Frédéric

Orava
Top 100 Contributor
Finland
Posts 991
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Bronze Member
Orava replied on Mon, Feb 18 2013 9:07 AM

Those I mentoned were those I did use, not saying that there is no better ones.Hmm Anyway, they did work allright and I will use them in future if I do these again

 

 blah-blah and photographs as needed

chartz
Top 25 Contributor
Burgundy, France
Posts 4,171
OFFLINE
Gold Member
chartz replied on Mon, Feb 18 2013 12:37 PM

I used plain compound epoxy glue about 30 years ago to repair Kef B200 bass drivers, with a HUGE ferrite, almost the size of the speakers themselves and they are still working.

Jacques

Ricardo
Top 200 Contributor
Moonbase 5
Posts 418
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Ricardo replied on Tue, Jul 16 2013 1:25 AM

Following Orava's wonderful instructions

 

 

All ready to be cooked up in the Microwave for a few hours and Voila my drivers should be ready to rock n roll.

 

Søren Mexico
Top 10 Contributor
Mexico City
Posts 6,411
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Bronze Member

Ricardo:
Following Orava's wonderful instructions

Nice job, but the micro will turn woofers into tweeters, cant wait to try this myself.Smile

Collecting Vintage B&O is not a hobby, its a lifestyle.

Ricardo
Top 200 Contributor
Moonbase 5
Posts 418
OFFLINE
Bronze Member
Ricardo replied on Tue, Jul 16 2013 3:42 AM

Søren Mexico:

Ricardo:
Following Orava's wonderful instructions

Nice job, but the micro will turn woofers into tweeters, cant wait to try this myself.Smile

Please note the use of shims, Two different sets were needed - one set for centering up the magnet then a second set for centering the voice coil. What I used was card stock in varying thicknesses,

Kind of had to  sort that one out on my own and required a handful of test fits before I was satisfied,

Just waiting for the glues to completely dry for a day or so before put them thru a sound check.

Rich
Top 50 Contributor
Orlando, Florida, USA
Posts 2,598
OFFLINE
Bronze Member
Rich replied on Tue, Jul 16 2013 5:28 PM

The 8" woofer is probably harder to handle with the larger magnet, but with the P45 woofers (5"?), you could still move the magnet a bit while the epoxy is still "wet."

A "dry" test fit, though, is absolutely essential.

Good luck with the sound check.


Ricardo
Top 200 Contributor
Moonbase 5
Posts 418
OFFLINE
Bronze Member
Ricardo replied on Sun, Jul 21 2013 6:57 PM

Slight delay due to issues with the Crossovers on both speakers. Somebody got stupid and put a bit too much load on these guys I think

 

Ricardo
Top 200 Contributor
Moonbase 5
Posts 418
OFFLINE
Bronze Member
Ricardo replied on Tue, Jul 23 2013 11:34 PM

It worked both bass drivers have been tested and are in good working order. Sadly the damage to the one crossover was sufficient enough to short out one tweeter.

Luckily plenty old stock out there on the web.

Garyy
Not Ranked
Posts 4
OFFLINE
Bronze Member
Garyy replied on Fri, Oct 28 2016 12:08 AM

Hello,

i have some P45 and the magnets have slipped off the two woofers. The magnet and back cover and the centre metal bar are still in place.

is it possible to reattached the magnet without removing the speaker and removing and dis atelier the whole cone? 

The rubber surround all look in great condition. 

Thanks for your help

Gary

Dillen
Top 10 Contributor
Copenhagen / Denmark
Posts 13,191
OFFLINE
Founder
Moderator
Dillen replied on Mon, Dec 24 2012 11:46 AM

Very nice work indeed ! Yes - thumbs up
I always preferred to repair rather than replace.

Martin

GlennB
Not Ranked
Posts 7
OFFLINE
Bronze Member
GlennB replied on Mon, Dec 24 2012 11:58 AM
Congratulations :-)
Søren Mexico
Top 10 Contributor
Mexico City
Posts 6,411
OFFLINE
Bronze Member

Dillen:
I always preferred to repair rather than replace.

Thank you Orava, I will see my P45s (Tex-Mex Smile) speakers Wednesday or Thursday, will report back with condition, top job you did here, congratulation.

Collecting Vintage B&O is not a hobby, its a lifestyle.

zeckomat
Not Ranked
Austria
Posts 1
OFFLINE
Bronze Member
zeckomat replied on Tue, Feb 12 2013 8:36 AM

Good job! I really thought there's no way 'round seeking a new woofer. I will try that with my non-woofing S45-2 soon.

 

Orava
Top 100 Contributor
Finland
Posts 991
OFFLINE
Bronze Member
Orava replied on Tue, Feb 12 2013 10:26 AM

Good luck. Really, it is not rocket science, but requies handy work. Yes - thumbs up

 blah-blah and photographs as needed

freddy63
Not Ranked
near Dijon-Burgandy-France
Posts 35
OFFLINE
Bronze Member
freddy63 replied on Thu, Feb 14 2013 7:24 PM

I'm impressed, i wish i had read a thread like this a few years ago. I might have saved my S45 woofer !

I am curious about the types of glue used.

The white glue looks like wood glue, can anyone explaine what types of glue are used on the dust-cap ? and spider/chassis ? and rubber suspention/chassis ?

Frédéric

 

Orava
Top 100 Contributor
Finland
Posts 991
OFFLINE
Bronze Member
Orava replied on Fri, Feb 15 2013 7:28 AM

freddy63:

I am curious about the types of glue used.

The white glue looks like wood glue, can anyone explaine what types of glue are used on the dust-cap ? and spider/chassis ? and rubber suspention/chassis ?

Frédéric

 

Hi

I used Hempels Epoxy (danishSmile) on magnets, it is slow hardening and never let me down, I also use it on my boat so has to be good. And yes the white glue is ordinary good quality PVA-glue, someones might shake threir heads, but I didn't found reason why not, in these places it doenst, in fact it cant be flexible like when glueing surroundings. On these rubber surroundings I used Danalim(again danish) contact-glue, not like contact, but immedially wet-glueing.

 blah-blah and photographs as needed

freddy63
Not Ranked
near Dijon-Burgandy-France
Posts 35
OFFLINE
Bronze Member
freddy63 replied on Fri, Feb 15 2013 4:42 PM

Thank you for making that clear.

I looked up Danalim glue, the yellow, universal adhesive 300, seems to be what you used.

Frédéric

Orava
Top 100 Contributor
Finland
Posts 991
OFFLINE
Bronze Member
Orava replied on Mon, Feb 18 2013 9:07 AM

Those I mentoned were those I did use, not saying that there is no better ones.Hmm Anyway, they did work allright and I will use them in future if I do these again

 

 blah-blah and photographs as needed

chartz
Top 25 Contributor
Burgundy, France
Posts 4,171
OFFLINE
Gold Member
chartz replied on Mon, Feb 18 2013 12:37 PM

I used plain compound epoxy glue about 30 years ago to repair Kef B200 bass drivers, with a HUGE ferrite, almost the size of the speakers themselves and they are still working.

Jacques

Ricardo
Top 200 Contributor
Moonbase 5
Posts 418
OFFLINE
Bronze Member
Ricardo replied on Tue, Jul 16 2013 1:25 AM

Following Orava's wonderful instructions

 

 

All ready to be cooked up in the Microwave for a few hours and Voila my drivers should be ready to rock n roll.

 

Søren Mexico
Top 10 Contributor
Mexico City
Posts 6,411
OFFLINE
Bronze Member

Ricardo:
Following Orava's wonderful instructions

Nice job, but the micro will turn woofers into tweeters, cant wait to try this myself.Smile

Collecting Vintage B&O is not a hobby, its a lifestyle.

Ricardo
Top 200 Contributor
Moonbase 5
Posts 418
OFFLINE
Bronze Member
Ricardo replied on Tue, Jul 16 2013 3:42 AM

Søren Mexico:

Ricardo:
Following Orava's wonderful instructions

Nice job, but the micro will turn woofers into tweeters, cant wait to try this myself.Smile

Please note the use of shims, Two different sets were needed - one set for centering up the magnet then a second set for centering the voice coil. What I used was card stock in varying thicknesses,

Kind of had to  sort that one out on my own and required a handful of test fits before I was satisfied,

Just waiting for the glues to completely dry for a day or so before put them thru a sound check.

Rich
Top 50 Contributor
Orlando, Florida, USA
Posts 2,598
OFFLINE
Bronze Member
Rich replied on Tue, Jul 16 2013 5:28 PM

The 8" woofer is probably harder to handle with the larger magnet, but with the P45 woofers (5"?), you could still move the magnet a bit while the epoxy is still "wet."

A "dry" test fit, though, is absolutely essential.

Good luck with the sound check.


Ricardo
Top 200 Contributor
Moonbase 5
Posts 418
OFFLINE
Bronze Member
Ricardo replied on Sun, Jul 21 2013 6:57 PM

Slight delay due to issues with the Crossovers on both speakers. Somebody got stupid and put a bit too much load on these guys I think

 

Ricardo
Top 200 Contributor
Moonbase 5
Posts 418
OFFLINE
Bronze Member
Ricardo replied on Tue, Jul 23 2013 11:34 PM

It worked both bass drivers have been tested and are in good working order. Sadly the damage to the one crossover was sufficient enough to short out one tweeter.

Luckily plenty old stock out there on the web.

Garyy
Not Ranked
Posts 4
OFFLINE
Bronze Member
Garyy replied on Fri, Oct 28 2016 12:08 AM

Hello,

i have some P45 and the magnets have slipped off the two woofers. The magnet and back cover and the centre metal bar are still in place.

is it possible to reattached the magnet without removing the speaker and removing and dis atelier the whole cone? 

The rubber surround all look in great condition. 

Thanks for your help

Gary

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