In my use case the Helix is my primary audio interface for my DAW. I record Guitar and Vocals using the Helix as the interface. While I enjoy the built in microphone pre-amp for vocals, I'd like to know the best way to integrate and patch an external pre amp into the Helix. The Mic pre is by Warm Audio. It has a balanced +4 line level output. Both a 1/4 inch TRS jack and XLR are available as outputs, Should I: Get an XLR -20dB pad and plug the Warm output to the Helix XLR mic input? (Ensuring the p48 is off on the helix) Go into one of the line RTN 1/4 inputs, If so are these helix inputs TRS or TS and what adapter cable would you recommend?