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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Yes, but you should only need one transformer, at the DVR end. It's just to break the "ground loop" that allows the audio cable to also be part of the power circuit.
Try it either way around, (33 ohm to the mic or to the DVR) and see which gives best audio.
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