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Rear Mic Input Wiring
AE0MW
Member ✭✭
This really seems like something I should know, but I've never really been involved with commercial or "prosumer" audio gear so I'm not sure and could use some pointers.
Due to some long overdue shack reconfiguration, I need to the move my microphone connection from the 8-pin front jack to the rear of my 6500.
The hardware reference document says that the rear balanced input is suitable for a dynamic microphone, but stops short of a recommendation on the best way to wire it.
What is the best way to connect a conventional dynamic microphone to the rear inputs?
My thought is that I should wire the tip and ring of a TRS connector to the MIC+ and MIC- and then PTT to the RCA jack.
Is there any advantage/disadvantage to this over using the XLR connector?
Currently I'm setup for the 8pin front jack, but I can make adjustments if necessary. I am feeding audio into the 6500 from a NCS-3240 so I have a fair bit of flexibility regarding drive levels, etc.
Thanks in advance!
-Mike AE0MW
Due to some long overdue shack reconfiguration, I need to the move my microphone connection from the 8-pin front jack to the rear of my 6500.
The hardware reference document says that the rear balanced input is suitable for a dynamic microphone, but stops short of a recommendation on the best way to wire it.
What is the best way to connect a conventional dynamic microphone to the rear inputs?
My thought is that I should wire the tip and ring of a TRS connector to the MIC+ and MIC- and then PTT to the RCA jack.
Is there any advantage/disadvantage to this over using the XLR connector?
Currently I'm setup for the 8pin front jack, but I can make adjustments if necessary. I am feeding audio into the 6500 from a NCS-3240 so I have a fair bit of flexibility regarding drive levels, etc.
Thanks in advance!
-Mike AE0MW
0
Answers
-
Hello,
I have a Heil PR-781 directly hooked to the rear XLR plug, i then use a Heil foot switch to PTT the radio AND the amp.
0 -
TRS and XLR are equivalent. Here's a good treatment of how to connect an unbalanced mic to balanced input and the pitfalls: https://www.presonus.com/news/articles/balanced-unbalanced
Personally, I'd consider springing for a decent mic using XLR balanced connector and take full advantage of the common mode rejection of the 6500 balanced mic input.
73, Barry N1EU2 -
Marc, I expected that but thanks for the verification!
Barry, thank you for the excellent article. I quickly skimmed it but will read it more thoroughly later. It looks like the primer I need on audio. A quick skim makes me think of balanced audio more like RS-422 differential serial port wiring.
0
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