Car Stereos: stereo speakers, rcas, stereo speakers

Question
the car has rears through amp (4channel) so i tried to install front speakers thought it aswell but no sound in them i use rca from the head unit to amp...............my thoughts are that the switchs on the amp may not be set up right. or did i just stuff up!!! they are not making any sound at all is it a wiring poblem or amp problem

Answer
If you did not run a front set of RCAs and a rear set of RCAs, then that part of the amp is not getting a signal.  If you do have all four channels connected to the RCAs, then there may be some switch that isn't set right.  Double check all the switches and settings, and you should find something that isn't set correctly.  Hope this helps, Scott