Ik dacht wel dat die hele discussie hier begonnen was.......
Hier dan ook maar even:
http://www.hifi-writer.com/he/misc/rmspower.htm"Why there is no such thing as 'RMS watts' or 'watts RMS' and never has been"
"RMS watts is meaningless. In fact, we use that term as an extreme shorthand for power in watts calculated from measuring the RMS voltage (RMS is validly used in this context)."
"In a sense, using power measurements is a bit like reporting on how much an amplifier weighs. Weight has no direct influence on quality, but a high weight does tend to suggest more attention has been paid to quality issues. And, likewise, with power output."
http://en.wikipedia.org/wiki/Root_mean_square" It is possible to calculate the RMS power of a signal. By analogy with RMS voltage and RMS current, RMS power is the square root of the mean of the square of the power over some specified time period. This quantity, which would be expressed in units of watts (RMS), has no physical significance. However, the term "RMS power" is sometimes used in the audio industry as a synonym for "mean power" or "average power".
http://en.wikipedia.org/wiki/Audio_power"An ideal (100% efficient) class AB amplifier with a 12-volt peak-to-peak supply can drive a signal with a peak amplitude of 6 V. In an 8 ohm (see impedance) loudspeaker this would deliver:
Ppeak = (6 V)2 / 8 Ω = 4.5 watts peak instantaneous.[4]
If this signal is sinusoidal, its RMS value is 6 V ? 0.707 = 4.242 V(RMS). This voltage into a speaker load of 8 Ω gives a power of:
Pavg = (4.242 V)2 / 8 Ω = 2.25 watts average [5] ".
