Currently I'm recording my stuff over the FX send of my Amp over a 5m unbalanced cable into my audio interface's preamp. Speaker simulation over Nebula. Everything's working fine but I just don't feel well running a 5m cable unbalanced So I think about using a passive DI box for getting a balanced signal after my FX send. I'm just a bit unsure about impedance missmatching. I did not find any information what impedance an amp's FX send has and if a passive DI Box is the right solution for my intend. Any experiences/tipps?