Alex Dinn, I will attempt to answer these questions:
Must I use only 44.1 Khz Ir?Yes, because that is the (highest) sampling rate of the EPSi
Do you use Mono or stereo IR?Use stereo if you have use stereo effects. I have a stereo setup (stereo power amp and 2 FRFR speakers) so I just go with stereo
. If you have a mono set up you will not hear the difference of a stereo ir/effect combo.
Why do you set the intput on 9 and the output on 3?Those are the recommended settings from Singtall who has the most experience with the 11 rack/EPSi, you can change these if you want to suit your setup, aim is to avoid clipping/distortion of the signal.
What are your fav IR from the ownhammer modern pack? There are so many...I hear you brother
, I am still working my way through the vintage pack. It is a difficult if not impossible question. as the answer depends on the tone you are after! This is why some bands spend years in the studio
trying amp/cab/mic combos for that perfect tone!