Micro Acoustic Cartridges

Does anyone remember the operation principle of these cartridges?

leica192504-09-2016 2:59am

jbrrp1 Details Discussions Posts This discussion Message User 423 posts 04-10-2016 at 02:26am Copy Comment URL Report Comment Edit Delete Yep. Loved the 2002e back in 1978. It was pretty good in my basic system powering Large Advents. Piezoelectric, if I recall.