Can US 220 Volts Be Used On European 220 V Amp?

I am in the US and all my audio components run on the traditional voltage from a standard wall outlet. I am considering the purchase of a European amplifier that runs on 220 volts. If a US 220 Volt socket is added in my listening room, will the 220V European amp run properly on this US 220 voltage? Some thoughts I had is that the US 220V is 60 Hz, while (I think) the European 220V is 50 Hz.  I plugged in a volt meter into my wall outlet and it reads +/- 120 volts. Does that mean the the 2-pole voltage is 240 volts? Lots of questions and I don't want to damage the 220V European amp if I decide to buy it. Let me know your thoughts and experiences. Thanks in advance.