I have a set of Kenwood KFC-P709PS connected to a Kicker 350.2KX *i think it is*. So about 3 weeks ago I moved the amp so I can put the back seat down. Then today, I put hooked the RCA cable back to it, and Im getting bass and whatnot but no vocals at all. I changed RCA cable. Did nothing. I changed the speaker wire. Did nothing. Tried just the speaker without the tweeter. Still nothing. Checked power and ground connections. Nothing. I factory reset my headunit which is a KVT-516, and that didnt work. Im lost here. I checked all the connections on the back of the head unit and all that. Everything is good. I wanna say my amp is buggered but its pounding my speakers like no tomorrow. I even played with my gains and nothing.

 check the cross over settings sounds like its on low pass and not.. full or high pass

I'm guessing you mixed up the crossover switch on the amp, did you set it to low pass instead of high pass?

Damn Big John, that was fast!

That was problem lol. It was set on low. Now it works just fine. Thanks.