Mcintosh MC 402 2 ohm tap

my dealer told me you can change taps it cant hurt the amp cause of the autoformers match the load but you are still useing the same amount of power i have played with the taps i dont tell any change in the sound i talked to mac teck suport they all so said there is no sound change

I agree..my dynaudios sound better running through the 2 ohm taps as well

Definataly not. My Strads dip down to 2 ohms for most of the lower bass and some mids and I go back n forth between 2ohms and 4 ohms.

Your 4 ohm speakers may dip down to the 2 ohm region, so you're not going crazy.