I have been a fan of ML quasi-dipole electrostatic speakers for the last 20 years. I started out with the little Aerius I and then the SL3. These speakers are amazing for their fast and accurate reproduction of recording music as long as they are paired with proper amplifier(s) and speaker position. They are not perfect and not for every one. I would not listen to ML with heavy rock, rap, techno...but rather with Classical music and Jazz. Fans of Diana Krall, Patricia Barber, Madeleine Peyrous...etc will enjoy the larger than life vocals and the accuracy separation of the instruments.
Having said that, I would not expect heavy bass on these transducers from ML. I have a pair on the way from Amazon for $90.00 that is such a good deal that I cannot pass on. I know what I would expect from ML house sound even though I do not like the entry level ML home theater speakers. Cannot wait to put Diana Krall, or David Sanborn for a test drive with the Mikros 90.
I have always LOVED the big ML's , they are truely in a class by themselves and will suck you in, they sound so liquid and alive, I wish I had listened to Patricia Barber, I love her too, what a combo great seasion. Sadly I never owned a pair, but they are my dream speaker without a doubt.