What is the difference between rms and peak power?

RMS-Power always has  a Positive Value, while the Peak-Power can have a Negative and Positive Values too !

The RMS power rating is the measure of continuous power that an amplifier can output

thanks for invitation 

In electronics we have to measure waveforms. The most common ones are DC and sine waves, that most people with any knowledge of electronics know.With a constant voltage or DC, the peak is the DC value and the RMS is also the DC value.With AC sine waves, the peak value is the highest point in time of the sine and the peak to peak is twice that being that the signal is symmetric around zero.  The RMS represents the heating value that an equivalent DC would create when either is driving a pure resistor. In this case of a sine the RMS value is 0.707 (1/square root of 2) times the peak value.One way of thinking of this is if you flip the negative half up (rectifying it) since positive and negative values heat resistors the same, and then bulldoze the peaks down into the valleys created... then the RMS will be the resulting level height created.For a square wave the peak is the height of the  square wave and the RMS is the height as well.For a triangle wave the Peak is the tip of the height of the triangle and the RMS is 1/2 the peak.

RMS power is a drived from squar wich is statistical measurement of the magnitude of a varying quantity and is applied to voltage or current

peak power is used to make a product seem more powreful than it actually is

The square is the average amount of continuous watts and put out by the amplifier through your songs. Just a side note, if you measure the output, and is rated rms output size and depends only on the maximum size. Few will give amp spec that says "rms Max", and this is actually more accurate. Confusing, but a minute lol. Watt peak is what puts the amplifier through a short musical explosion, such memoranda bass and hear one of the next bassmobile on the road. So it will be mostly 17 watts out with a few moments of 52watts ~. Now, there is no standard for how to keep the musical explosion must have to measure watts peak, or the extent of distortion allowed, but usually more well-known brands is not fake as legacy or pyramid etc. may be. Peak important if you listen to a lot of music with those bursts. For example, if the tops of your amp 500watts, but speakers at the peak of your 150watts, there is a problem. A lot of people say watt peak does not mean anything, and it's marketing trick. Well if this idea is correct, then there will be a peak rating in each amp on the market. I would think that amps prestigious and higher-end do not need to use a tactic like this. If there was really any peak wattage, then when people these memos systems hit the bass, it should not dim headlights ... because the wattage is the only square, right? Voltage must remain constant because there is no need for additional amps of current to reach these watts "peak

The RMS measure the fluctuation of the field and the peak is the maximun value of the field

rms means root mean square- which apply to a variable power to give us a measur of continues power of amplifiers

While peak power is a measue of non-danger amount of max power can amplifier can develop

agree with expert answers above

rms=refference zero and up that is rms is always positive >0.

peak power = the power peak to peak from negative to positive.

if a signal is symmetrical that is the positive part and the negative part of the signal are equal peak=2xrms or rms=1/2peak

RMS Power Ratings:The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. RMS power is derived from Root Mean Square which is a statistical measurement of the magnitude of a varying quantity and is applied to voltage or current. Yeah…you can disregard that and just concentrate on the fact that RMS power should be what you use to compare any car audio products. Even the RMS power has its flaws and inaccuracies, but for the most part it’s the most accurate depiction of real, continuous power so far. Here is the kicker, the way a company calculates its RMS power is different for each company which then makes RMS power inaccurate as well. Not so fast, all products that are CEA-Certified are tested using the same testing methods and can be compared in an apples to apples fashion. For more information on CEA Certification, read our articles on CEA-2006 and CEA-2031 compliant devices.

Peak, Max or Dynamic Power Ratings:No matter how you word it, this form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage. Often times this rating could be reached with a big bass hit or a very loud note in a song as it’s played using the correct amplifier. We do not recommend that you use the peak, max or dynamic power rating when configuring your system because it does not reflect the products capability under everyday use.