I’ve been playing about with this problem for a little while as I wasn’t satisfied with the hiss from the H4N’s preamps.
Going in to the TRS at PPM4 and setting the record level to 0.6/100 is quieter but working of the backstop is just wrong. Also even when my SQN limiters kick in it’s not soon enough to stop zooms limiters crunching it.
My current solution is to put a 20dB pad in line, plug into TRS and set the record level to 12/100.
It’s quiet (no preamp) and doesn’t clip.
Off to test record some atmos this afternoon.