Anybody have a rough idea or know what the max output and rms is on the standard speakers in a 58plate astra with the CD 30 as standard installed in it?

Its a 3door with 2 tweeters in the window frames, 2 front and 2 rear speakers if that helps?

Not sure if it tells you in the manual (will have a look later when i get home) but thought it mite be quicker on here considering some of you know this useful kind of info off the top of your heads

Thinking of upgrading the ICE in it you see so need to know how much it will cost to improve it all.