That is a very modest uprating compared to the 1000w PMPO computer speakers that were common in the 1990s, usually powered by a 10VA transformer.
Or my Berecha 1000 watt: http://stereo2go.com/forums/threads/is-this-the-longest-boombox-ever-made.1699/#post-13897
PMPO has always been a joke. The Hitachi 3D7 was advertised with a maximum power of 3w+3w+14W. However, a year or two later, the exact same boomer was advertised with "60W PMPO". https://en.wikipedia.org/wiki/Audio_power#PMPO