Wilfredt, I own the predecessor to the Sanders Sound 10b which is the Innersound Kaya. The Kaya's are a little bigger than the 10b and/or 10c. These speakers do not lack in dynamics and can handle high SPL with no fear of arcing like Quads. They are also full range with no need of a subwoofer because they basically have subs built in. They need a powerful amp to drive the electrostat panels but come with an amp to power the woofers. I'm using an Innersound amp for the panels and it drives them well.
I have heard the 10b and 10c at RMAF a few times and they sound very similar to my Kayas. Driven by a good source these are very good speakers.
They are very directional in the high frequencies because of the flat panel. This results in a one person sweet spot. If you usually listen in the sweet spot then this is not a problem. The benefit of the highs being directional is there is less interaction with the room.
I have heard the 10b and 10c at RMAF a few times and they sound very similar to my Kayas. Driven by a good source these are very good speakers.
They are very directional in the high frequencies because of the flat panel. This results in a one person sweet spot. If you usually listen in the sweet spot then this is not a problem. The benefit of the highs being directional is there is less interaction with the room.