What is the RMS? 30000 watts is PMPO, Peak Music Power Output OR Peak Momentary Power Output. RMS measures power output over time, rather than at peak performance ( source ). PMPO is often a way for manufacturers to make a product appear to deliver more power than it actually can. This value has no real significance for extended periods of playback as it only measures momentary power and does not indicate the output of a speaker across a wide frequency range.