IMO and personal experience with the NAD kit, it may incrementally help (s/t SYTSTEM SYNERGY ALCHEMY comments below) but only by a comparatively limited amount at the NAD's build quality / price point strata; so don't go overboard expecting a quantum leap improvement. Again $100 is your threshold max IMO.
The quality and performance output of this upgrade is variable and system-dependent. Any power cable upgrade to better performance exercise is only a very small part of an ethereal alchemy created by the synergy (or lack thereof) provided by all of:
(i) your source,
(ii) the electronics themselves,
(iii) all the cables (Power/ ICs and speaker);
(iv) your speakers, and
(v)the listening room environment warts itself.
One "change" factor by itself alone may -- or may not --have a desired positive effect. Alternatively it may have no effect, or even be an adverse effect. This is a journey and not a destination exercise with a trial and error factor as its mantra.
The quality and performance output of this upgrade is variable and system-dependent. Any power cable upgrade to better performance exercise is only a very small part of an ethereal alchemy created by the synergy (or lack thereof) provided by all of:
(i) your source,
(ii) the electronics themselves,
(iii) all the cables (Power/ ICs and speaker);
(iv) your speakers, and
(v)the listening room environment warts itself.
One "change" factor by itself alone may -- or may not --have a desired positive effect. Alternatively it may have no effect, or even be an adverse effect. This is a journey and not a destination exercise with a trial and error factor as its mantra.