Whenever I see speakers on stands with spikes - and I have no experience with spikes - I wonder if they’re vibrating some of their energy into the stand itself, and thus losing some of their refinement.
A pair of Ohm Walsh II’s - and Magnepan too - sound bass-heavy and muddy in the low end, and vibrate the floor - the Walsh far more than the Magnepan.
Up on Sorbothane hemispheres, no vibration, bass issues gone, and the soundscape becomes properly tight and they can handle much more base.
A pair of Infinity Kappa 6 don’t sound bad on their stands, but they sound noticeably finer when isolated from the stands.