You will have to get a trigger signal from your source, seach the forum for Peter Pan connections

Thanks for the reply. getting there. Just found a third party box that will allow to use it as active speaker but 200 EURO for a PCB board is a rip off and it is not B & O supported. 

Search this forum for "BeoLab 3500 center speaker".

Daniel wrote:

Search this forum for "BeoLab 3500 center speaker".

And in those threads, I believe the general opinion was that a BL3500 (like any integrated stereo speaker) will suck as a center due to combing effects etc...

A topic much discussed in this forum. Do follow Daniel's advice and search the forum for the many threads dealing with this issue.

I'm afraid that in my opinion, you're headed down a very long dark path with this. The black box that you found is the only "easy" way of doing what you're suggesting. I for one have discouraged others from going down this path. I own a BL3500 and like it very much for what it is. I just can't imagine using it for a center channel, something it is not designed to be. But I do understand the temptation.

Much luck.

Slighty off topic, but a bit relevant.

I just wall mounted a bL3500 in our bedroom, and it just occured to me that when I listen L&R are reversed, as it is on the wall above our bed.

So - a really good upgrade to this product would be a switch that reverses Left & Right channels. 

From  my days installing, I know link speaker positioning is often a compromise - and 3500 often go in kitchens and bedrooms in a location that is, in effect, behind the listener.

I will at some point break into the ML and reverse the L&R feed - I'm fairly sure there are no implications for the rest of the house - there are 4 other ML rooms, but if I reverse the L&R localy to the bL3500 should be OK.

He, he, that's why I placed mine on the wall opposite to our bed. On topic again, our sponsor sells a Loewe centre speaker for 400£, maybe that's a path to try? Click on the ad for Life Style AV on top of this page.

@Daniel

I think you're right about the Loewe speaker. I have no idea how it sounds as a center channel, but at least it was designed for that purpose.

I have seen a BL6000 used as a center channel (with a special end cap fitted on the bottom). It looked ok and sounded ok.

Unfortunately for Monkab, this approach might still be out of budgetary reach.

beo-ap wrote:

@Daniel

I think you're right about the Loewe speaker. I have no idea how it sounds as a center channel, but at least it was designed for that purpose.

I have seen a BL6000 used as a center channel (with a special end cap fitted on the bottom). It looked ok and sounded ok.

Unfortunately for Monkab, this approach might still be out of budgetary reach.

Loewe speaker is my last option and there are few on sale in ebay. Though I want BL3500 or BL6000 just to match with other beolab 8000. I don't have a option to check how good is loewe center. BL6000 is my next option but I have to buy a pair which is really out of my budget bracket. And not sure if I can find one BL6000 speaker for this purpose.