Plitron NBT Transformer graph.

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
Sorry web address was truncated. Please add:  -nbt/   - or - hit the google search result