I want to do a little DIY upgrade to my current stock sound system. Thinking about buying an amp (any good quality 4 ohm stable with less than 1% THD) and subwoofer (10 to 12 inch subs 4 ohms) in an off the shelf box. Probably thinking of getting used stuff too.

Quesiton 1: What would be good amp and speaker? (Have not done sound setup for a few years now, dont know what is new)

Question 2: Does anybody know if Honda's Stock headunits have RCA connection in the back? (1998 honda accord EX with the dual din single CD player AM/FM)

Anybody selling their stuff, pleae let me know....