Items like “regulation speed” do not apply in the conventional sense, the active noise cancellation system is responsible for dealing with any noise within the audio band, regardless of its source.
At higher frequencies where active noise cancellation stops being effective arrays of surface-mounted capacitors keep the internal impedance very low to well > 50MHz.
The key regulation limit is actually the resistance and inductance of the cable attached to the iPower, all other parts offer superior performance (as it should be).
