My amp blew in my 2004 g35 coupe. I have contacted numerous stereo stores and they all tell me something different. Do I need to buy an oem replacement or can I buy aftermarket? One store told me the infiniti deck doesn't have power and that it comes all from the amp so buying an after market won't work unless i buy new speakers and a deck and someone else tell me an aftermarket amp will work, I will just have to change the settings so I don't blow my speakers since my amp that blew was 225 watts I think and the new one would be around 300. I'm confused . I called my local infiniti shop and they gave me a price of 900 for a

new amp. That's insane. I don't want to buy a used oem part either. Any thoughts?