I have a 2001 Honda Civic. I just recently replaced the speakers in the front and the back along with the deck. The speakers are the same size as the factory ones that i replaced. For some reason when i turn on the the deck none of the speakers play. You can see from the deck that the CD or radio is playing but for some no sound is coming out of the speakers. I know the deck works because there ins't any error messages showing on it. Sometimes the speakers will play for a couple of days but if i turn the volume up to loud or I put to much bass in all four speakers will cut off, and before it does it will sound as if it is shorting out. I had them looked at but I was told that they were all installed correctly. Anyone have any ideas, driving around without any music is really getting annoying.

 

Is there a loose connection with the speakers? If they work only sometimes, that is a possible reason.

If you have a test light or multimeter, you can see if the speakers are actually getting a signal. And are you positive that the speakers are in good working order?