i have a 03 sedan w/ the bose. i asked circuit city if i can replace just the speakers and they recommended i change the factory head unit too. they said it may work but at high volumes it may not sound too great. is this true? has anyone replaced just there speakersand not the factory head unit and not had any problems? thanks for ur input

Bose systems vary a good bit. Some use 2-ohm voice coils where the standard aftermarket speaker is a 4 ohm.

If your sedan uses 2 ohm speakers then the Bose amp will only deliver 1/2 the power (watts) to a 4 ohm replacement.

I personally suspect that the only 2-ohm speaker in the sedan is the subwoofer, if any, but I haven't had a chance to meter them yet.

But on top of that, don't go to short circuit city. They suck a**.

Where are you geographically? Tell us and we can help you find a real specialist that knows something about audio and electricity. Most CC guys are either the too-young-and-green, or the washed-up, due to what they pay installers. The good ones go eslewhere to work.

thanks for the great input. i dont know much about stereo equipment. i just want to get a better and louder audio without spending a fortune. i live in houston, tx.

andycon, where did u get ur speakers installed? i really want to change all 4 6.5 speakers and replace the amp if it improves things, but i definately do not want to change the head unit. u know if that is possible? thanks

I heard that is not possible. The factory headunit runs off of the factory amp, which runs the whole system.
The fronts are 6.5's, you have 2 sets of rears...on the sides,, i'm not sure maybe a 4" or 4x6 or sumtin. the upper rearspeakers near the window are 6x9's.

It is possible to use the stock head unit and replace the Bose amp and speakers. You can achieve pretty good sound this way too.