BG posted:

Hi folks:
Please forgive this rather elementary question, but I didn't see a similar one in the other posts.

I need to build a simple 4-ch, 1 into 2 mic splitter using Edcor xfmrs. I know that you've recommended a PCW600/600 for this, but I was wondering if there would be any advantage to using a PCW 600/150?

My thinking is that... perhaps... the lower output impedance of the 600/150 would be a tiny bit better, since it's better to go low output to high input. I'm using Shure location mixers, and I think their mic input impedance are typically around 1k... (but they might be 600, since this is pretty old stuff.)

I'm also assuming that since there are no core-to-ground connections on the xfmr, that the XLR pin 1 would go to a common connection point- a star ground- connecting pin 1 of all the xlrs... input, the direct output, and the isolated output... the xfmr case, and the chassis. Does that sound correct?

Thanks very much, BG

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By using the 600/150 you will loose some of the signal because you are stepping down. I would still suggest a 1:1 ratio transformer or even a 1:1:1 transformer. I do know that EDCOR has a 1:1:1 transformer designed for the type of application.