mount it in your garage, enjoy the loud music at home!.. if that doesn't work, the best, dryest, safest place is under or on the bottom of your console, if your amp is so big it gets real hot, install some vents and maybe some computer fans that you can wire to a temp sensor to come on auto when the amp is either on, or the console temp is too hot.. under the dash will get wet, anywhere in the interior will get wet, so, the console only makes sense..