peak X .707 = RMS right ? just as long as they tell you if it's peak or RMS it doesn't matter which rating they use

Right, as long as it is continuous peak, so to speak... Music power usually refers to peak power of short transients (when power supply draws power from its capacitors, and output stage relies on heath capacity of transistors themselves), if it refers to anything meaningfull at all...

Dragi "Bonzi" Raos
Zagreb, Croatia
Q#5196, MkII#80000376, 18GB green