The big change though is that the SRM-400S is an all FET design with dual FETs on the first stage and FETs also on the output ...
He shows a couple of takes on the design, both with neodymium magnets but with different foils and 3D printed or wooden surrounds. They both make a noise when plugged into an amplifier ...
Results that may be inaccessible to you are currently showing.
Hide inaccessible results