I want to use the 75ohm coaxial digital outputs on a G61/G68 processor and convert them to a 110ohm AES/EBU compatible signal. Obviously the cables and connectors are different but the real problem is the impedance difference.
Flea
SpeakerLink is 110 ohm balanced like AES/EBU.
So if you use a SpeakerLink G61/G68 then you can make a simple wiring adaptor from SpeakerLink RJ45 out to XLR AES/EBU input on the Genelec, no impedence matching would be necessary.
As you specified G61/G68 I presume you haven't bought one yet, so thought I would suggest a SpeakerLink one as a better solution.
Cheers,
Rick