Hi. I have heard that some people run into troubles when amplifying signals from basic head unit as it also amplified the gongs and parking sensors to unpleasantly high levels. Does anyone experienced this issue? If you did how did you tackle it please. I have upgraded my door and parcel shelf speakers to Logic 7 ones and also added tweeters, which lowered the impedance and weakened the sound output of my 6.5" subs (4 ohms). What if I install the 2ohm subs from hifi setup, would it bring some of the volume and punch back or am I just delusional :)? Sorry spent way too much thinking about this and I am no pro so some advice would be highly appreciated. Cheers guys!