BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)

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Norman Tracy

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #40 on: 3 Nov 2021, 08:42 pm »
One look at this photo from page 1 of this thread and I'm all in it is totally worth the effort. Big dome midrange drivers are unicorns in 2021 and worth the effort to conserve and enjoy.



B&O products are like the super model who is also a member of the mensa society. Many refuse to believe she can be that smart if shes so pretty. When I worked retail Hi-Fi our in-house repair technician's favorite brand to work on was B&O because they were designed to be repairable. Presently they are certainly on the vanguard of using DSP and wireless control behind the stunning industrial design.

The grandson of OSIB16's speaker reviewed on YouTube - The Perfect HiFi Home Audio System?? Bang and Olufsen BEOLAB 28 Review https://youtu.be/STrFEJHFqhs

OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #41 on: 26 Nov 2021, 06:36 pm »
Here are my plans to create grill brackets that accept wooden slats…


 













LINK TO FILE     http://ravstedlokalhistorie.dk/beoworld/Beolab1.stl
« Last Edit: 8 Dec 2021, 10:56 pm by OSIB16 »

Chk911

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #42 on: 11 Mar 2022, 07:19 pm »
Hi

Any updates to this great project

OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #43 on: 14 Mar 2022, 09:41 pm »
Hi

Any updates to this great project

Just waiting for B&O service centre to get it all up and running.

OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #44 on: 7 May 2022, 01:03 pm »
HiFi Tuning Supreme Silver Gold fuses…






OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #45 on: 7 May 2022, 01:15 pm »
Mundorf AG, Audio Note Kaesei, Elna Silmic II caps…








OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #46 on: 7 May 2022, 01:21 pm »








11 Gauge Supra Stranded wire…


OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #47 on: 7 May 2022, 01:23 pm »



JCarney

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #48 on: 7 May 2022, 03:12 pm »
I enjoy this thread. You are nuts, in a good way. :D

Jody

Bemopti123

Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #49 on: 7 May 2022, 03:51 pm »
I am following this with much interest.  Awesome to improve things, that other's might not consider worthwhile use of their time.  The issue with some of these B&O products is the miniaturization of components on their amplifier boards...making their later products obsolete due to manufacturing techniques. 

OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #50 on: 7 May 2022, 09:29 pm »
I enjoy this thread. You are nuts, in a good way. :D

Jody

and obsessive😂

JCarney

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #51 on: 7 May 2022, 09:48 pm »
It looks like you are having fun, and you are not skimping on anything from what I can tell. Thanks for the entertaining thread.  :D

JCarney

S Clark

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #52 on: 7 May 2022, 11:31 pm »
I enjoy this thread. You are nuts, in a good way. :D

Jody
+1    :thumb:

OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #53 on: 8 May 2022, 03:33 pm »
JCarney and SClark,
                             Thanks. I must have worked on more than 20 speaker projects in my time. But this one is my favourite so far. Learning so many new things now.

OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #54 on: 20 May 2022, 11:09 pm »
Crevices and uneven areas of the baffle have been filled with Milliput and Outdoor Filler…





OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #55 on: 20 May 2022, 11:12 pm »
Correct damping applied to the relevant areas. This will reduce cabinet colorations…


Nick B

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #56 on: 21 May 2022, 09:05 am »
Correct damping applied to the relevant areas. This will reduce cabinet colorations…



Great attention to detail and great fun to follow your progress  :thumb:

OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #57 on: 21 May 2022, 01:38 pm »



OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #58 on: 21 May 2022, 01:46 pm »
Thanks NickB. I just wanted to reference/document my work on the internet, so that in the future; other people who own Beolab 1’s can gain knowledge on how to restore and improve these wonderful speakers. Especially after the internal black foam cable sheath begins to disintegrate and melt over the PCB.

OSIB16

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Re: BANG & OLUFSEN SPEAKERS OVERHAUL (BEOLAB 1 MODIFICATIONS)
« Reply #59 on: 22 May 2022, 11:49 pm »
OK so I have just completed the audio modifications to this speaker. Connected them to up to my B&O Beosound 4 hifi unit. After only two hours of music playback, I have one word to say…

WWOOWW !!!


Zero cabinet coloration, crazy holographic soundstage with super width, depth, height (basically the walls of my room vanish along with the position of the speakers themselves). Pure and mellow  with incredible detail retrieval. Real ‘in the room sound’ with actual instruments taking up spaces in various areas of the living room. Very reminiscent of my modded Martin Logan CLS IIz electrostats.


Unfortunately I went through Hell to get to these babies up and running. Had an undiagnosed issue which kept forcing the speakers into Standby Mode. So after sending the internal amplifiers off to a registered Bang & Olufsen repair centre; it turned out that the problem was caused by a loose connection on the long jumper wires that link up to the individual drive units. This was fixed by wrapping some PVC tape tightly around the bunch of wires at the point where they protrude out of the connector plug.


The other issue I had was that the internal settings were incorrect and off kilter. Bass and treble potentiometers were set too high, resulting in excessive brightness and slightly distorted bass. However this was sorted out after I reduced the levels

« Last Edit: 12 Jun 2022, 04:17 pm by OSIB16 »