This is not to compete with Robert's Reviver or anything else. But to get attractive pricing I bought some stuff in bulk on eBay, namely the Neutrik Impedance Transformer which normally go for around $40.00 alone.
I can sell these with the correct attenuation for about $60.00 each. The parts alone (new) would come close to that. The Neutrik Impedance Adapter is used. I have 16 of them. I'm currently using 3 and will keep a 4th.
Cat6 to Neutrik XLR to Neutrik Impedance Adapter with -6dB Attenuation added and a Mono Price BNC to RCA.
This does nothing for COMMs. And is for folks with an SpeakerLink Preamp and Legacy DSP speakers. Hook Comms the way you do without the SpeakerLink Preamp.
You can see below the output is exactly what G68ADV Outputs and includes the impedance transformer. This is probably similar to what an AC12 has in it.
You can just hook SpeakerLink Direct.
You can do just an all resistor circuit.
You can do just impedance matching.
You can do impedance matching plus small amount of attenuation.
They are all known to "work", but I wanted exactly what the G68ADV produced and the safety of a transformer. That's what these do.
Baseline Target G68ADV Output (as expected 0.5V P-P)
![[Linked Image from farm1.staticflickr.com]](https://farm1.staticflickr.com/586/30657934264_8f7aece7b4_o_d.png)
G61SL SpeakerLink after Neutrik 110 to 75 Impedance Match with -11dB Attenuation
(I used the same attenuation used for AES to BNC, this was right on at 0.5V P-P [same as G68ADV output above] with an impedance transformer)
Finished Passive SL to SPDIF