I am running the following :

(front) focal krx2 - Max. Power 200W

- Nom. Power 100W (2 way component kit)

(behind) Focal 165 cvx - Max. power 140W

- Nom. power 70W ( 2 way co-axial kit)

Amplifier- Alpine PDX-F4

100 watts x 4 chan @ 2 ohms, Total RMS: 400 watts, Signal-to-Noise Ratio: 76dBA,

Alpine PDX-F6

150 watts RMS x 4 at 4 ohms (150 watts RMS x 4 at 2 ohms)