Simple question here how much can a vvx 8" handle? I know it says 400rms but for those who own them would I be able to put lets say 600rms for daily use? And how good are they?

Why would you want to over power it? You won't hear the difference between 400 and 600 watts so why would you risk damage?

Putting more power than RMS to a sub is usually not a good idea. Why do you want to give it more? It probably won't be any louder and you risk thermal and mechanical stress that could lead to early driver failure. Some of the more experienced car audio guys frequently run more than rated for a variety of reasons, but I just don't see any advantage for the average user.

The driver is built to handle more power and underrated. It is used as a marketing technique. They built a stronger driver, rate lower, then make videos of testing with more power and people are fooled into thinking it's better than it is because it can handle more power than it's rated for. It sells product to the ignorant and misinformed.

However, since Kevin calls it under rated it may be over rated. Everything he uses in marketing is suspect IMO

Thanks for your input just a simple question out of curiosity.

Wasn't really that simple. If you are asking will it take a 600w sine wave, in X box, in your car, at 60Hz, for 20 seconds, then Yes!

I'm new to audio systems so I'm jst trying to learn by making questions and doing research.

The correct way a sub is rated is it is tested over a period of time until the subs t/s parameters changes in a way that it would hinder its operation as tared by its parameters

But you have to ask the question what exactly does the rating means as nearly no one states this clearly. Is it a rms thermal rating, is it the above, or is it a rms rms musical rating like it sounds like you are asking. And if it's a musical rating what type and size of enclosure bc that will affect how much the sub will take.

The correct way a sub is rated is it is tested over a period of time until the subs t/s parameters changes in a way that it would hinder its operation as tared by its parameters

But you have to ask the question what exactly does the rating means as nearly no one states this clearly. Is it a rms thermal rating, is it the above, or is it a rms rms musical rating like it sounds like you are asking. And if it's a musical rating what type and size of enclosure bc that will affect how much the sub will take.

Oh ok I'm starting to get it. At the end a part of it depends on the enclosure as well.

The box is an air spring. So the bigger the box, the looser the spring, the less power it takes to move the speaker. And vise versa.

Although there are formulas to calculate this. (I actually have worksheets for MathCad that can calculate Rms power it would take for sub with a given suspension and moving massto reach xmax in any giving enclosure volume.) most manufactures never give out this info. The only one I can think of that did was Adire.