Assertion: electrostatic speaker | /r/Desires | large transformers
Facets:
Source sentences:
text: Although they can produce excellent sound, they have a number of drawbacks: they generally don't work well at low frequencies unless they are very large (to compensate for having a thin diaphragm that doesn't move much); they need to use high voltages to work effectively, which means they need large transformers that consume a lot of power; and they're extremely expensive compared to traditional speakers.