I work as a guide and podcaster. When I travel on buses I'm trying more and more to use my own mics rather than the crappy mics found on most buses. The problem is that most bus audio systems use a 4-pin xlr jack instead of a 3-pin. Years ago I had a bus mechanic make me a cable for their coaches that went from 4-pin to 3-pin. I recently had to take the 3-pin end out to re-solder one of the connections. It looks like they only have one wire and a shield. I can't get the 4-pin end to come off so I can't check the wiring for that end. It looks like the hot wire is on pin 3 and the sheild connects to pin 2.
I'm wondering if anyone else has fidgeted with this. On some buses I get feedback and I'm wondering if that is due to only having 1 wire and a shield. Also, does anyone know where one can source the 4-pin male and female jacks? I'd like to make some additional cords as a backup.
I'm wondering if anyone else has fidgeted with this. On some buses I get feedback and I'm wondering if that is due to only having 1 wire and a shield. Also, does anyone know where one can source the 4-pin male and female jacks? I'd like to make some additional cords as a backup.