ConstantM
Inspired
but those s8's are passive ones, right? they dont have a transformerYes, transformer isolated splits ensure 1) the source signal sees the appropriate input impedance, 2) prevents damage from the house inadvertently enabling phantom power on your line level inputs (your Fractal, keyboards...) 3) gives you a ground lift for each input, if needed. A passive Y-cable will typically work fine for line-level signals, but mics may have issues.