Salas hotrodded blue DCB1 build

Hi.

I got 2 PCB´s (one for each channel) from Thea-Bag because I want my DCB1 to be balanced. I'm pretty new at DIY amplifiers.

So I got a question about the wiring at the inputs, I can't find the answer anywhere, searched this forum and google a lot.

I will have most XLR inputs and only XLR as output, but I would like to have one or two RCA inputs but don't know how to wire them, hopefully one of you help me???
 
I found this in my files. Surely from older posts of a balanced builder in the Hypno DCB1 threads. RCA can be paralleled to hot and ground single phase on each.
 

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  • DCB1 BAL Wiring Scheme.jpg
    DCB1 BAL Wiring Scheme.jpg
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Is it correct to determine the combined load as follows?:

(1/Zin1 + 1/Zin2)^(-1)

Where Zin is the input impedence. (I realize that balanced inputs may/will have different Zin than the SE inputs)

Sorry for the naive questions. Thanks for your patience.

Ryan
 
Use 30VA separate trafos and 200mA CCS setting each in own regs populated for best separation config. Using 3mm floor of a medium size box for sinking can avoid separate sinks bulk and cost and it will suffice. Use silpads.