A loudspeaker in which the diaphragm is one plate of a capacitor.
"I received my order of the 3 CDs yesterday. I'm very happy with the way they sound. The strings (high notes) are nice and sharp again. That I'm very happy about. Thanks for doing a good fast job! It feels good to be able to have some favorite hard-to-find songs on a CD finally. You never know, one day they may stop making turntables ..."