Hi everybody,

This weekend I tried to connect the SPDIF out from my receiver to the SpeakerLink in on my M6's. I was looking at this thread where Syles enumerates the functions of the pins in the SpeakerLink connection. I made a quick breakout to go from SPDIF out on my receiver to SpeakerLink in on the M6. I followed the guide, connecting AES+ and AES- to the brown/white and brown wires, respectively. Ground went to blue/white. When I connected the ethernet cable to the M6 speaker, one of the resistors fried (the 55Ω that goes from the AES- to ground). Needless to say, I unplugged everything very quickly!

After the smoke cleared (fortunately only the resistor was damaged), I plugged in the ethernet cable into the SpeakerLink in connection on the M6 again. This time the other end was unconnected so I could measure -- I got +12v from the brown AND brown/white wires relative to the blue/white wire (which I assume is ground).

Do you have any idea what is going on here? It seems odd to me that the SpeakerLink in has +12v for anything, but definitely not something I expected an AES digital input would have.