The thing about the waves off the back of the driver is that they have an output that is equal to the output into your room. The usual way to deal with that is add MDF bracing upon bracing which adds weight and more weight which lowers the resonance and makes the problem worse. High resonance is much easier to deal with. Ping on a wine glass, to shut it down you merely touch it with your finger. That won't happen when you rap on a larger and heavier pan for example. Take out the 12" woofer from a speaker and you can see how vulnerable they are.
Ideally to deal with resonance a speaker should be small and light. Or as small as possible and still maintain enough volume to load the drivers.
The other advancement that makes a huge difference is composite technology. That is what happens when you touch the vibrating wine glass. Your finger and the glass work together to stop the resonance. Some speakers do that. My guess is that most don't. Vandersteen uses some carbon fiber in their model 7. Carbon fiber is excellent because sound waves pass through those long carbon molecules which vibrate and turn to heat. Works on planes that avoid radar detection. The radar waves don't bounce back to the source rather they are quickly converted to heat.
It is easy to recognize how fast and clean electro static speakers are. The back waves are dumped into the room and the cabinet doesn't have to deal with them. They obviously have other problems.
Ideally to deal with resonance a speaker should be small and light. Or as small as possible and still maintain enough volume to load the drivers.
The other advancement that makes a huge difference is composite technology. That is what happens when you touch the vibrating wine glass. Your finger and the glass work together to stop the resonance. Some speakers do that. My guess is that most don't. Vandersteen uses some carbon fiber in their model 7. Carbon fiber is excellent because sound waves pass through those long carbon molecules which vibrate and turn to heat. Works on planes that avoid radar detection. The radar waves don't bounce back to the source rather they are quickly converted to heat.
It is easy to recognize how fast and clean electro static speakers are. The back waves are dumped into the room and the cabinet doesn't have to deal with them. They obviously have other problems.