I have a Zoom Livetrack L-12, and I'd like to to use the two stereo channels as individual microphone channels. Obviously, I will need a microphone preamp for each of these channels in order to do so.
My first thought was to just get a cheap interface (e.g., the Behringer U-Phoria UMC202HD) and send the signal from the 1/4 in. outputs on that into the 1/4 in. inputs on the stereo channels on the Zoom. However, the 1/4 in. outputs on the interface are TRS (mono) balanced and the inputs on the Zoom are TS (mono) unbalanced. So, without a DI box (or, perhaps, pulling one of the jacks halfway out—which I'd like to avoid), this can't be done properly.
My next thought (with the same interface) would be to just take the 1/4 in. headphone output (which is obviously a stereo TRS jack) and break that out into two unbalanced mono signals, which I would then plug into the two channels of the Zoom. However, for this to work, the two XLR inputs on the interface would necessarily have to be assigned to the left and right channels of the stereo signal (respectively) of the headphone jack. I can't tell if that is the case for this interface, and ones like it (perhaps that's typical—I don't know).
Would the above approach work? And/or is there a simpler/cheaper alternative to achieve what I'd like to achieve?