information on UTC NCOA MC4558 micro controller

i have a 4 gamers sub box kindly donated to my from my sister now i've instantly opened it up to have a good look to see what i can do with the parts that are on it so i noticed it has this micro controller which i want to know what else can i do with it?

i found a data sheet but im unsure if it was to the right one

Would i be able to use this to power some small speakers? or is this thing way to powerfull? im still learning so bare with me chaps

Photos would be good, especially when people might not know what a "4 gamers sub box" is.

Ah i suppose that would help, i've put it in the attic for now i will have to dig it back out and get a photo of it