Hi js,
I don't think that B&O have a product that will work as an adapter in this situation with your existing cables. As Beolab 3's need careful grounding to prevent induced noise reaching the digital amps, I would advise against trying to combine your existing Powerlink cables with a separate adapter.
I always recommend using a single, purpose-built cable from the source to the speakers for the best sound quality and to prevent noise. This also solves the issue of identifying left and right channels in the Powerlink cable, as each speaker is only fed the signal for the channel that it needs to pick up.
B&O provide stereo RCA to Beolab 3 cables, plus I also keep these in stock in my online store at the link below:-
http://soundsheavenly.co.uk/bando-rcatolab.htm - please select Beolab 3 as the speaker type.
If you prefer to order this cable from your local store, you are welcome to ask them to obtain a Sounds Heavenly cable and I will be pleased to assist.
Kind regards,
Steve.
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