Plitron NBT Transformer graph. http://www.toruspower.com/narrow-bandwidth-technology
See this website for a comparison of noise reducing effects including normal toroids, balanced toroids and NBT transformers.
The results indicate the apparent clear superiority of the NBT transformer. Comments?
I'm presently using Equitech and value its benefit in my Spectral,MIT system. How do they address 120,180,240,300