A moving-conductor speaker in which the steady magnetic field is produced by a permanent magnet.
"Received the cd's yesterday and am so very pleased and excited to have them. I am 81 years old, and to be able to hear my parents singing tgether again is a joy--a joy that brings tears to my eyes, but that"s a good thing!! Thank you for the beautiful job you did. Your continuing contact with me was professinal and so reassuring. Thanks again!"