I'm looking at getting 4x Rockford 6x9's and an amp to power them.

The speakers are rated 75w rms @ 4 ohms and 150w peak.

The amp I am looking at pumps out:

4 x 70W @ 4 ohms (12.5V - 0.085% THD)
4 x 120W @ 4 ohms (14.4V - <1% THD)

Would it be overpowering to run them at 4 x 120? And how is the 12.5 vs. 14.4v determined? I am new to all this so I'm just trying to learn

Kicker KX650.4

Speakers

Thanks!

Seems to me that amp would power them perfectly, just set the gains appropriately and you'll be good to go.

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the 12.5v is with the car shut off, and the amp running strait off a normal battery, the 14.4v is with the car running and charging so there is more power because of the alternator... i think... ha!

Haha.. Sounds good to me

And thanks! I just wanted a bit of confirmation before I disappointed myself As long as I keep the gain down I should be ok by the sounds of it

Hmm... Started thinking and I'm wondering if I'm not better off going with a 5 channel amp to save space.

I'm looking at the Kicker ZX700.5 as opposed to running a Kicker KX400.1 and Kicker KX650.4.

I have 2x Audiobahn AW1205's on the KX400.1 right now and as mentioned with be running the RF speakers.

Would this maybe be a better idea?

well the 700.5 would be around 10"shorter then the 400.1 and the 650.4 running side by side. so would save some room that way... and the 700 maks about the same power as those two amps combined.