Very affordable EVO3 Premier power cords stayed and we changed from Polaris to Aquarius and Sigmas. Two clear steps up in sound - soundstage improved, more power and dynamics, timbre getting more natural.
Both filters isolate now every product perfect from each others - each outlet has own filtering. Always two high current, power unlimited outlets for power amps and four filtered outlets for rest of gear. Sigma just makes the better job for the price - both can stand in your normal rack - nice.
IsoTek
Sambs Hifi