If you do, DO NOT TUNE at anything but exact Voltage/gain recommended my ia20.1 was based for 34.5v at 0.5ohm(as me and my friend figured out) I tuned the gain up a notch above that..no bass boost, and that was the end of my ia20.1..funny thing it didnt even warm up as I felt it the last time before it rocketed out some smoke. Only under certain circumstances.