Can i plugged more satellites to the Megaworks 510d ?

[larsete]

I have the Megaworks 510d,and i have plugged three more front satellites (from cambridge too) to the sub.So my question is,if it can damage the amplifier,or just if it can´t give enought power to the 3 more satellites,just will sound less?.Sorry about my english and thanx for any help ;)