I found Spectral DMA 360 to be much better than the 9011 on 101s on all aspects - soundstage, tone, speed, dynamics, slam, separation.
(...) Respectfully, I think it is inaccurate to generalize. There is quite a large difference of opinion as to whether the back wave of an electrostatic speaker should be absorbed, diffused or allowed to reflect. The correct answer for a particular situation often is driven by how far from the front wall the electrostatic speakers can be located to optimize the time delay of the rear wave.
I do not care for brightness, and I have never felt that I had a brightness problem by allowing the back wave of my dipole speakers to reflect.
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