Rick R
Veteran
According to SD specs, the MixPre 3/6 series recorders have a 3.5mm TRS stereo (unbalanced) output with a max level of +7.8dBu, so ... it would not work well feeding a +4dB balanced line input. I think the same goes for the Zoom F series (they would feed a cam-hop transmitter nicely though).
The 633 has pro line level main outputs though (max +20dBu).
The 633 has pro line level main outputs though (max +20dBu).