So your device has to issue a preamp out audio signal as well as a trigger voltage to turn the amplifier on and off.
The A102 was designed to connect passive speakers to a Bang & Olufsen product that expected active speakers. It therefore mimics a pair of B&O active speakers such as two Beolabs 8000. The volume control has to be provided by the preamp.
I still have mine and it works with my Beovision Eclpse perfectly. I used it previously with a Beovision 7 (now relocated in a bedroom).
