Indeed, we all know that class A amplifiers deliver the best results. But if you need a lot of power, you cannot pay the energy bill at the end of the year. Some people think that speakers will not be blown up if the amplifier has a lower maximum power rating, if it is between or well below the recommended rating. For example, you have speaker boxes that state 20 - 200 Watts. If your amplifier delivers a maximum of 20 watts, there is a good chance that you will blow up the tweeters first. Of course you immediately wonder. BECAUSE THAT'S IS IMPOSSIBLE, the why is easy to explain. We all know that if you overload a group, no more power will come out of that socket. Unfortunately, not all amplifiers have a fuse that ensures that they go off when they have to supply more current than is possible. ?The 200 Watts are needed for sufficient bass reproduction, the volume knob is set to 10 but still a lack of bass reproduction. And now many people are turning the bass control, at the moment this button ensures that the bass is amplified, you hear distortion?!! AS SOON AS YOU HEAR DISTORTION, immediately reduce the volume, the amplifier is clipping, the sine wave becomes a square wave. Which blows up the tweeters first and then destroys the amplifier. It is wiser to purchase an amplifier that can deliver at least the maximum, in this case 200 Watts, >200 Watts is no problem, just never turn it higher than 200 Watts. If you have a class A amplifier, it uses 400 watts, even without sound output. AB amplifiers are the solution, but now also the class D amplifier. The 'D' here does not mean digital, this is clearly explained on the www. Listen to the Hypex Nilay DIY MONO (2x) or Stereo amplifier yourself, should actually be reviewed by What HiFi. Like the Veddan origin an electrostatic amplifier that doesn't miss anything, I can't afford it, but I don't think there are better speakers.