Gman is bar theory ghalat hai
an amp at 0.1 ohm wont ever work to give u its 1000rms rated power at 1ohm, it will definitely definitely overheat and trip
coz ur reducing resistance increasing current flow. Thats why some amps have impedance detectors if they are not stable at 1ohm they will go into protection the moment 1ohm load detected
plus lower ohmage to reduce gain n thd n all, is double edged sword.
(you gain cleaner signal due to lower gain settings but on the other hand the damping factor of amp drops drastically) so u dont gain or lose much
why would u need a low ohm load, when most HU.s are high volt and proper rcas ur automatic position for clean signal becomes 9-o clockish which is fine
Plus thd is a big big big thing :D, it can be noticed at any hz