This might be a dumb question but once you guys tune your amps, etc with all the input sources set to "flat" do you go back in and change the EQ settings on things like your head unit or phone? (IE: If you are listening to "rock" do you change it to "rock" on the HU or phone, turn the bass up/down, treble up/down depending on music selection or will this negate the original tuning when it was set on flat?)