I know there are 100 reasons why this will not improve sound quality but I just want to do it for fun - WITHOUT BREAKING ANYTHING. I just got a new pair of speakers and want to play them with my old ones still hooked up.
New speakers: 96 db, 6 ohms
Old speakers: 95.5 db, 8 ohms
Amplifier: 150 watts/channel
I would just hook up a separate set of speaker cables to the amplifier along with the speaker cables already hooked up to my old speakers.