Ok i recently installed my system with the pioneer d3 but now all my music has an echo and when i fade the speakers from left to right both sides stay on and when i go into the subwoffer option and i turn it off it still stays on so please if anybody can help i would really appreciate it thanks

Are you using the RCA's or the harness? If you used the harness, be sure all connections are isolated, well connected (crimp or solder), and sealed. If using rcas, there are a few issues where the grounds suck and you must add new grounds but theres a tutorial on the forum so search. Otherwise, check the output settings in the menu.

What vehicle is this in?

Im using the rcas and it in a 2007 Honda civic

Be sure you have all the setting applied to the RCAs correctly and be sure your amps are properly set. Also make sure you have all the correct rcas connected.