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Converting Beolab LCS 9000 to passive speaker powered by MCL2P

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BeoIce
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BeoIce posted on Wed, Apr 20 2016 7:12 PM

Hello all,

I would like to convert a Beolab LCS 9000 to a passive center speaker powered by a MCL2P amplifier for my surround setup.

As there is not enough space between my tv and the cabinet below, Beolab LCS9000 is the only speaker that will fit, technically and optically. BL 7 speakers are no option, because their depth is too high. It won't look very well under the tv if it is mounted 10cm from the wall, but BL7's front is about 20cm from the wall.

Converting Beolab LCS 9000 from a masterlink speaker to a powerlink speaker will work, but it includes very much technical knowledge and massive modifications of the internals.

I know of the almando devices, which converts the speaker to a powerlink speaker, but it's expensive and would create noise in the signal way.

As I currently have a B&O ir-eye between my tv and the cabinet below, I would like to integrate the internals of this ir-eye into the LCS 9000 case, right behind the display where normaly the dot matrix display is integrated.

Is there anybody out there who has previously done such passive modification and can help out with the required crossovers or is able to build a passive crossover which suits LCS 9000 well ?

Any help or ideas are welcome :-)

 

Kind regards

Martin

BeoSound 9000 MK3, BeoLab 8000, BeoLab 6000, BeoLab 3500, LCS9000, BeoLab 11, BeoLab 7.2, BeoLab 7.1, Beolab 4 PC, BeoCenter 2300, BeoSound Century, BeoSound 8, Beosound 2, BeoVision 7-40 MK2 , BeoVision 7-32 MK3, BeoVision 6-22, BeoVision 4-42, BeoMedia 1, BeoCom 4, BeoLink 1000, BeoLink 5, BeoLink 4 & BeoTime

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BEOVOX141
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Hi

I believe you can use the MCL connector directly..

No need to tear the speaker apart Wink

Beobuddy
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BeoIce:

 

Converting Beolab LCS 9000 from a masterlink speaker to a powerlink speaker will work, but it includes very much technical knowledge and massive modifications of the internals.

 

BeoIce:

Is there anybody out there who has previously done such passive modification and can help out with the required crossovers or is able to build a passive crossover which suits LCS 9000 well ?

 

Which one do you think is more work? The drivers inside the BL 3500 has a well balanced active filter. Converting this to a passive 2 way filter is possible, but it will never sound as the original. A passive filter will send the complete frequency spectrum at the woofers where the active version has a adapted filter for the drivers. So, no overload caused by lower frequencies.

I've converted several BL3500's to powerlink with just some minor changes. The advantage is that the MCL socket is the same as powerlink. The only thing you have to do is to send the audio to the right pins (and bypass the audiocontrol circuit) and take the powerup signal on pin4 to  trigger the power for the BL3500. Leave the rest as it is. I have to look for my notes I made.

Still, some soldering skills are needed in both.

Teletom
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Beobuddy:

I've converted several BL3500's to powerlink with just some minor changes. The advantage is that the MCL socket is the same as powerlink. The only thing you have to do is to send the audio to the right pins (and bypass the audiocontrol circuit) and take the powerup signal on pin4 to trigger the power for the BL3500. Leave the rest as it is. I have to look for my notes I made.

Still, some soldering skills are needed in both.

I have a BL3500 Mk2 and would like to convert it to Powerlink. I will use it with Playmaker or Essence mk2. Would like to know which modifications have to be done. Thanks in advance.

Teletom

js
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js replied on Fri, May 13 2016 1:12 PM

Beobuddy:

I've converted several BL3500's to powerlink with just some minor changes. [...] I have to look for my notes I made.

Hi Beobuddy, I would also be interested in the conversion to PowerLink. Great if you are willing to share your notes, much appreciated in advance, many thanks :-)

js
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js replied on Fri, May 13 2016 1:14 PM

Beobuddy:

I've converted several BL3500's to powerlink with just some minor changes. [...] I have to look for my notes I made.

My post was moderated when I replied to Beobuddy that I am also interested in the PowerLink conversion and that I thank him in advance for sharing his notes. Anyway, I will just try again :-)

js
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js replied on Fri, May 13 2016 1:15 PM

trying to respond but all my posts go to moderation

js
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js replied on Fri, May 13 2016 1:18 PM

Beobuddy:

I've converted several BL3500's to powerlink with just some minor changes. [...] I have to look for my notes I made.

Still, some soldering skills are needed in both.

Shall I try again with other words: looks like a great solution, would be great to know the details, thanks a lot :-)

xps60
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xps60 replied on Fri, May 20 2016 9:57 PM

I would be massively grateful if you could share the modifications of the Beolab 3500 to Powerlink + trigger (pin 4). No problem if some soldering is required. Thanks in advance!

Mart

lelunde
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lelunde replied on Sun, Apr 14 2019 10:58 AM

I second this!

Steve at Sounds Heavenly
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Hi BeoIce,

This is an interesting thread! Yes - thumbs up There are also some simple options that can make the 3500 easier to use:-

1) If used as a stand-along speaker with a non-B&O TV, any version of 3500 or LCS9000 can plug directly into the TV headphone socket with a direct cable connection (no modification required):-

https://soundsheavenly.com/airport-express/155-2345-ipodtvairport-express-to-beolab-3500-mk2-cable.html#/2-length-1m/63-beolab_3500_version-mark_2

2) By updating a Beolab 3500 mk.2 (with Powerlink socket) to software level 3.1, the speaker can connect directly to a B&O TV via a Powerlink cable to work as part of a surround sound system:-

https://soundsheavenly.com/powerlink-8-pin-din-connection/23-2551-powerlink-mk-2-compatible-black-8-pin-din-cable-with-fully-wired-8-cores.html#/2-length-1m

3) The same update mentioned in item 2) above allows the mk.2 speaker to work with a non-B&O AV surround system using the pre-out sockets of the receiver via this cable:-

https://soundsheavenly.com/line-in-connection/101-459-singletwin-rca-to-beolab-2-7-10-2500-powered-trigger-kit.html#/2-length-1m

Hope this helps!

Kind regards, Steve.

Steve.

www.soundsheavenly.com

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