If the amp is a TS input, it is unbalanced and needs a XLR to TS cable. It does matter going from balanced to unbalanced signal. Double check me on that though with. Multimeter or pinout diagram or something.
Not seeing a lot of specs for those products on line but I suspect you may need the preamp, which is not the same as the transformer. Are you certain the mic in is a TRS jack? It seems like the kind of product that may only have a don't see any specifics about the mic preamp on the Aroma amp, which makes me suspicious. How did you hook the zoom recorder to the amp input? Was it a line out? If so and that configuration worked, I'd say that further points toward the preamp.
I might need a Mic Impedance Transformer to get 'power'/volume to the dynamic mic.
Just erase that detail, its wrong one way pr another and windmills do not work that way.
Things really took a wrong turn earier than that.
"In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move."
This isn't limescale though. The stainless surface isn't perfectly smooth already and appears to be a light brushed, though may just be spun. A kitchen scotch brite pad isn't going to increase the surface roughness any. That said, I'd use barkeepers friend for this particular issue.
Well known doesn't necessarily make them popular or a wise investment on the students part.
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