I’ve owned Magnepan 1.7is, and the Spatial M4 Turbos S’. The Spatials are the far superior speakers IMO. I’ve also owned the M4 Triode Masters which can easily compete with some $6K speakers I’ve heard. The Magnepans sounded like the $2K speakers they are. They have good microdynamics, especially in the upper bass (and only if you crank them), and good imaging depth, otherwise nothing special.
The Spatials are also quite easy to drive.
The Spatials are also quite easy to drive.