Thank you all. Now I have it working. Overture -> Powerlink Mk2 -> Passive -> Beovox S45
The Powerlink cable was the missing piece. Masterlink cable was the wrong path for my setup.
Thank you all for explaining. I have ordered a Powerlink Mk II cable. Cost me almost as much as I paid for the Passive.
And donĀ“t worry, the speakers to be used are B&O – Beovox S45. Will update when I have verifed everything works.