Your Circuit City guys are dummies <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>
Pull those #### amps if you have an aftermarket deck, all they are doing is pulling your 20 or so watts from your deck and turning it into 5 or so watts from the amp <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>
I pulled all the factory amps from my car, much much better off of an aftermarket deck or amp. To bypass the amps, you need to either find out which wires are the signal from the deck (unfortunately, I don't remember), or run some new wires back there. If you had somebody install the speakers for you in the first place, I'd recommend taking it to somebody to bypass the amps. That is, unless you feel like delving into it yourself. It's a fun project, but can take a #### of a long time if you haven't played around up there before :-)