Actually the original clipping problem was solved by turning off “mono mix” for recording to the Zoom (no computer). I did some other menu magic to get it to record properly on the computer. These adjustments also positively impacted the noise floor, but I couldn’t say by how much.
Since then I’ve just been blabbering about the Fethead. Do you see any other problems that need solving? Personally, I’m satisfied with a noise floor below -60.
When connected to the computer, it’s running off 5v usb. But I have also tested it with the computer off, running on battery power. The noise floor is lower without the computer, but nothing spectacular. With the computer in sleep mode, I can run it on usb power to avoid running down the batteries, and I haven’t seen any difference in noise, so the power coming from the computer is not causing any issues.
Phantom is on 48v.