"Serge Auckland" wrote in
message

I wonder if anyone knows how Electrostatic loudspeakers
can have any sort of bass response.

The most severe problem would probably not be the E/S design, it would be
the common use of open backs.

The back sides of loudspeakers are commonly enclosed to prevent the wave
created by the back side of the driver from radiating around to the front,
and cancelling the wave created by the front side of the speaker. Since low
frequencies aren't very directional, there's a very good chance of this
happening.

I don't know about the basic bass resonances of common E/S drivers, but the
smaller ones are likely to have fairly high bass resonances, which also
restricts their bass response.

Building a large E/S driver with a low bass resonance, supporting acoustic
response down to say 20-40 Hz, shouldn't be a problem.

Finally, the bass response of the matching transformer needs to be
considered.