Hi Ryan. Pretty sure it have been asked multiple times in forum but still I like to ask. I got an accord 2001 sedan and want to upgrade factory audio. Got inifinity kappas 6x9 at rear and some pioneer at front. Do not want a sub but crisp sound would be nice. With a Kenwood kdcx592, i am getting slightly better audio but still not crisp enough. Do i need an amp? I am on budget and really not into subs now (may be in future an 8inch sub). What will be my option? Any recommendation for used amps. Thanks in advance!!