Elizabeth is right but don't trust manufactures specs. They sometimes (often) lie, or do not tell the whole truth. When the say an amp delivers 50w into 8 ohm and 100w into 4 ohm. They don't really lie but more often then not the 8 ohm power delivery is more then number they give you. Just so that it looks like it gives double power into 4 ohm. So when they say 50w 8 Ohm it can also be 55 or 65 w into 4 ohm and 100w into 4 Ohm.
