wanted to thank you guys for the help with installing my infinity reference speakers! I apologize for jacking the OP's thread here. it was a little tough getting the crossovers mounted in the front doors while clearing the windows, but got it figured out. even on the 6 speaker base system, theres a huge difference after installing these speakers (component woofers in the front, 2 ways in the rear, and dash speakers). Obviously an amp would make it even better and that may come in time, but for now and for around $350 (on sale at crutchfield currently), i am more than happy with this set up. the bass in those components THUMPS