Thank you for the reply. I got to spend more time with the board yesterday. I worked most of the knobs and faders back and forth and found they worked a bit better. One of the middle eq knobs is non responsive so I’m hoping it’s just a loose connection and one of the gain stage knobs goes either 0% or 100% so I’m wondering if there’s a short somewhere. Otherwise it’s sounding incredible. It sure sounds like there’s some transformer magic happening when the low impedance switch is engaged.