1. Aspiring Evangelist
Join Date
Mar 2001
Posts
351

## WATTS question

My friend's speakers are "40wattsRMS" and ones that I saw on eBay are "380wattsPMPO".... But despite the number difference, how are the wattage different? We can't figure out what 'PMPO' and 'RMS' mean

Any peeps know??
- Shawn

2. Web Hosting Master
Join Date
Mar 2002
Posts
955
I think 40 watts means 40 watts and 380 watts means 380. I dont think whats at the end of them effects the wattage because a watt is a unit of power, nothing else effects it.

Join Date
Jul 2002
Location
UK
Posts
169
I think 40 RMS is 40 watts a second and 380wattsPMPO is 380 watts a minute.

380/60 = 6.33333333333

I may be horribly wrong though

4. New Member
Join Date
Aug 2001
Posts
4

## Re: WATTS question

Originally posted by nishansoft
We can't figure out what 'PMPO' and 'RMS' mean
http://www.childcomp.com/tut/audio/pmpo.html

5. Web Hosting Master
Join Date
Aug 2001
Posts
1,210

## Re: WATTS question

Originally posted by nishansoft
My friend's speakers are "40wattsRMS" and ones that I saw on eBay are "380wattsPMPO".... But despite the number difference, how are the wattage different? We can't figure out what 'PMPO' and 'RMS' mean
PMPO, Peak Power, and other such ratings are meaningless, and are usually used by second-rate audio component manufacturers and distributors to make their products look better than they actually are. PMPO is a measurement of how much power the speaker can actually handle for a fraction of a second before it self-destructs. In other words, the "380 watt PMPO" speaker mentioned can handle a momentary spike of 380 watts, but that's it.

RMS (Root Mean Square), on the other hand, is a much more accurate way of measuring/rating audio components, as it generally indicates what a component is capable of delivering/handling on a continuous basis.

Bottom line - always use the RMS numbers when comparing and evaluating equipment. If a piece of equipment uses one of the other rating methods in place of RMS, it is to be avoided.

-Bob

6. Aspiring Evangelist
Join Date
Mar 2001
Posts
351
Ahh, I see... Alrite thanks guys

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