Well, after installing the xr-600's in my front doors, I wired all of my speakers in stereo, the nice thing about my amp is if I want to bridge them, just flip a switch so after hooking everything up, I played w/the switches, there are 2 per channel. One for high pass/low pass and full range, and one for stereo/bridged/mixed mono. I did the fronts first, they sounded best in stereo, high pass. Same for the 6x9's. Then I played w/the variable crossovers to get the sound I wanted, sounds very crisp and clean, I am finally happy w/my system, the icing on the cake will be getting my damn eq/line driver to work, it's already installed, I just need to play w/the wiring and a relay to get that bish to power up then I'll be like this---->:yay: