Will Parasound A21 damage my NHT?

Will it damage my NHT 2.3 with 86 db and 200 W/C max into 4 ohms? I know parasound is 400w into 4 ohms. I usally listen to my speakers at 11 o'clock. How high can I go if I play loud before my speakers get damaged? I know nothing about amplifiers. Thanks.