When watching movie with a very dynamic soundtrack i.e quite moments and very loud moments. Occassionaly when a film soundtrack gets loud my amp will switch off and the power on/off button will display a flashing red light. This has happened on a few occassions. Is my amp faulty? On one occassion [during v for vendetta] I played the same scene a few times and it switched off at the exact same moment [loud sound effect] and than it played the same scene at the same volume without switching off. ??????