Total posts : 45366
One important thing we do not know is whether the FM1 can be turned up as high as the FM2, as Tim found it adjusts to a very high signal level.
A feature of the FM2 that could help you, TheLegacy, is the green LED that flashes when you are modulating at a good level, and a red LED that flashes for over-modulation. By comparison the FM1 only flashes for (red) over-modulation.
The audio quality of both is professional and excellent.
The so-called “hum” in the FM1 has been exagerated because of the difficulty of describing signal noise with English language. It is not an AC type hum. It is a very low level whine or warbling-whistle that can be heard on silent carrier or super low level audio. But guess what? With processed audio it cannot be noticed at all.
I send my main programming all day on an FM1 using Stereo Tool processing and I never hear the background sound.
The FM2 is used by me for audio editing, where more quiet times are part of the process and a very silent carrier is preferred.
Since I do have the means to re-set the RF output of the FM2 back to where it is now, I will adjust it to maximum and see how it compares to the FM1. That will answer the problem I expressed in my first sentence.
I’ll have the report done by early tonight.