On power amplifiers, loudspeakers can often be read an indication of an order of several thousand watts. Sounds nice but has nothing to do with the real stability->power! Just a small example: Car Hifi power amplifier with specified 2000W RMS power! In the IMAX cinema, power amplifiers of about 200W Sinus DIN (12000 RMS) are used! RMS is a pure fantasy unit mfg Volvo50