Ok here's the thing. Everyone sees either PMPO or RMS on the audio equipment when they look, but no one really understands the cconnection (if there is actually even a connection).
So, I was going to ask, but decided to use my brains. By brains I mean Google of course...
This is basicaly what I have come up with:
RMS is the true power of your speakers, where as PMPO is the peak power of your speakers.
What's the difference between true power and peak power you may ask? Because we all know that the true power would be the loudest setting possible right? WRONG! Because as is with most things, the speakers cant run at peak power all the time or they will blow.
Another thing is there doesn't seem to be a standard for calculating PMPO between different manufacturers so a Pioneer, JVC and Sony speaker, all 6x9s and all 300w RMS, could all have different PMPO ratings.
This also means that there is no mathematical way of converting RMS into PMPO or vice versa.
The reason PMPO ratings are used is the simple fact that big numbers sell better, especially when you have no clue what they actually mean. For example, you no nothing about systems, ratings, power, watts. You have the typical assumption that more/bigger speakers mean better sound. Now, you're standing there and you see two sets of speakers. One is rated at 200w RMS and the other is rated at 1000w PMPO. You don't know what that means, but you see they're the same price, so naturaly you go for the 1000w.
Same goes for amps.
So do yourselves a favour when your speaker/amp shopping. Look for RMS and not PMPO.
PS: This is very, very, vvveeerrryyy inconclusive so if anyone has anything to add please do so.
PPS: Not sure here, maybe this should be in reference material although it is sound exclusive...