Zoom AMS 44 audio interface with condenser mics not working with 424

Montanawildlives

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Just playing with my new (to me!) 424 today for the first time.

I have some dynamic mics on order but it will be a couple of weeks, and I had thought that I could use my existing condenser mics (which require phantom power) through my Zoom AMS 44 audio interface (which provides phantom power). I hooked everything up the way I thought it should be and no signal was coming through. The mic is a Rode M5. I know there are 100 things it could be, but I tried the following big ones:

1. Using only TS cable (not TRS) between the zoom and the 424.
2. Tried another input (my Yamaha Clavinova 835 directly into the input jack on the 424 via 1/4” cable—worked fine—saw the levels as soon as I hit a key and successfully recorded it.
3. Tried the mics into the zoom out via USB to my computer and ipad—worked fine (as it has for many weeks now).
4. Tried a variety of cables between the zoom and the 424. These included (1) brand new TS cable (2 of them); (2) adapted cheap 1/8” cable (with two 1/8” to 1/4” adapters); (3) the same cable I used for the Yamaha, which is a 1/4” TRS Y-split to two TS 1/4” cables (this worked fine when joining the Yamaha and the 424, didn’t work at all between the zoom and the 424 on either one or two channels).
5. Messed with the trim dial on the 424, all the way from line to mic. Nothing.
6. Replaced the batteries in the zoom (this was the first time I used it on batteries). .
7. Changed the zoom from mic/line to guitar. Nothing.
8. Made sure phantom power was switched on for the zoom, messed with gain. Nothing.
9. Tried different inputs (2, 5-6, 7-8 on the zoom); nothing.
10. Disconnected all the stereo equipment (see prior thread) and just monitored via headphones. Nothing.

So, can’t quite wrap my head around it. The mics-zoom-laptop works fine. The Yamama-424 works fine. The problem seems to be between the zoom outputs and the 424 inputs (replace either end with another device and everything works). But then I would think those 1/4” cables would be the problem, but…I tried 3. Maybe the use of batteries on the zoom changes the amount or type of phantom power?

Maybe the zoom just can’t talk to the 424 for some reason. Not enough or not the right level of phantom power. Not the expected line signal.

Anyway, if anyone has any thoughts or culprits to check, I’ve love to get a push in the right direction. Thanks!
 

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