Between yesterday and today tried the CS3 on 220 for the first time and the T-121 on 12 volts DC. It was a VERY loud weekend!
https://www.youtube.com/watch?v=IVEvBiicMYQ
https://www.youtube.com/watch?v=FXGstpy4OVg
https://www.youtube.com/watch?v=ITe7o27WTgM