2003 SSEI Speaker Aftermarket replacement

[Riptide]

Hey not sure if this is the right forum but i was looking to replace my stock monsoon speakers with some aftermarket kickers and I am replacing the head unit along with all the speakers. would anyone know what the amp puts out? i don't really want to replace the amp but i also want decent speakers. I can't find anything saying what kind of watts the stock speakers are and what the output is on the the amp. Thx in advance

[96 SSEi]

NO, DONT TOUCH THE HEAD!! - the factory alarm, chimes and possibly ant-theft is wired with the head unit. - you may start a nightmare for yourself if its not done properly