Measurements from engineering with the current Deep Core design show AC noise measurements as folows:
3Vpk-pk incoming noise on AC main.
15mV pk-pk outgoing noise on AC main after Deep Core.
95% reduction in AC mains noise? I would say that is good!
This measurement is JUST AC noise. It has nothing to do with the adjustment feature of the unit. It also blocks all DC on the AC mains, which is a great feature. This is what can cause transformer hum in systems where other current-heavy loads, such as resistive heating elements, inject DC into the AC mains feeding your audio gear. Tube gear is particularly sensitive to this, as are many SS amp power transformers.
Thanks,
Dan