RMS:
RMS stands for Root Mean Square. It is a measure of the effective power produced by an amplifier. This is the maximum sustained power the amplifier can deliver to a load (speakers) at a specified impedance, and less than a specific distortion level (THD). It is calculated by the following definition:
The RMS (root-mean square) value of the function
defined on
, whose square
is Riemann integrable on
![\begin{displaymath}RMS_{[a,b]} (f) = \sqrt{\frac{1}{b-a} \int_a^b f(x)^2 dx}.\end{displaymath}](/images/BW_img33.gif)
The RMS value of any function is always taken to be positive.
PMPO
PMPO stands for Peak Music Power Output, and is normally a measure of the total maximum amount of power an amplifier can produce at any given distortion level (THD) during a short transient. This is a totally useless value for the understanding of an amplifier's power output capabilities, and is very often seen in lower quality mainstream audio products. It is used mainly as a marketing gimmick.
What will you say about a set of speakers with these specks
- Real 5:1 Channel Surround Sound with AC-S, DTS & THX
- 5800W PMPO Sub-Woofer System
- 25 W RMS Per Channel-Satellite
- 50 W RMS Wooden Sub-Woofer
- Magnetically Shielded Speaker
- CE Approved
- With IR Remote Controller
Thanks
Mike
Depends on what you want to use it for. For computer audio it sounds cool. The output of the subwoofer does not really tell me anything, as I have explained in this article. Being magnetically shielded will help if you use a CRT monitor close to them.
It also depends on the make. Some vendors tend to use higher quality components than others.
Thanks for the reply Waldo. I intend to use it as a home theather set of speakers. What do you think.
Ah okay then. Can you provide me with a make and model number so that I can look up the details on the web?