I am using a Synergistic Powercell for all components except for amps. For the amps I use a Shunyata Cyclops. Power cords are Synergistic for most source components, Bybee-Tweekgeek for the DAC and Triode Wire labs for the amps.
I have not used a power conditioner on my REL subs, except for plug in modules on the line, such as High Fidelity magnet barrel, NCF Clearline, and Nordost QK-1.
I would like to try the Ansuz power cables on the Rel subs. Has anyone tried the Ansuz power cables on subwoofers ? I heard they have excellent bass quality.