Here are the two ERPs from the same study design, though different subjects. The largest amplitude in the 1st one goes up to 25 uv, while only goes up to 6 in the 2nd figure.
Differences: The 1st one were recorded with 60-channel Easycap, analyzed in Brain Vision, nose referenced; while the 2nd one were recorded with EGI 128-channel Geodesic Net, analyzed in Net Station, averaging referenced. Are these sufficient to explain the big difference in the voltages? Thank you!