Hi, just an install related question when it comes to wiring. I want to wire two different pairs of speakers to a 2 channel amplifier. They both are 4 ohm speakers, but one pair has an Rms rating of 50, and the other pair has an Rms rating of 75. Should I wire the two pairs together? Or should I wire one pair into one channel and the other pair in the other channel? Thanks for the help!