I bought my buddies old car after he bought a new one. It came with a very nice Pioneer H/U and Polk DB6500's fabricated into the doors. All the wiring was left in place so all I did was drop my sub and amp in, hooked everything up. I have to say, these Polk's sound REALLY good. Very neutral. I have them crossed @ 80hz. Being powered by a US Amps Xterminator 1600.4 - 100wpc RMS @ 4 ohms for the 2-channel. The other 2 channels power my RE SR 12. ;) It's bitchin!