4Ohm speaker parallel

Servus @ all Hab ma again a question! If I have two 4Ohm speakers I can “turn on” the parallel then ham se yes as far as I know only 2 Ohm. Right?? If yes I can hang them on en amp and thus the power output on the amp increases. Does that then sound like something or do you hear no difference Thx for the help in advance Mfg Steffen