How can I connect a car stereo to my home speakers?

Episode 1114 (1:33:03)

Steve from Canoga Park, CA
Car stereo

Steve has a car stereo and he wants to connect it to home speakers. Leo says that he's got the resistance mismatched which could cause some damage. Steve will need a step converter to be able to handle it. But many believe that there's not enough mismatch to worry about it. An impedance matching transformer would fix it, as would two speakers in parallel.