Rear Speakers are REAL quiet

[chevyboy55]

As the title says the rear speakers are putting out very little volume. When you turn the fader to rear you can just barely hear any volume. the speakers don't rattle & crack like they are blown out, they just have little volume. The head unit is a Kenwood KDC X592 it has a 1000 watt amp (don't remember the brand & 2 10" subs, don't remember the brand but I think they are JBL. they are under the seat & I don't want to pull it out just to see) the speakers(dash & 6"x9"s) are Infinity's. The subs & dash speaker work fine, just the rears are low volume. I checked to make sure they are connected, they are. Any ideas of where to start looking? Mike