Is a mains power cable supplied with this unit? If not, which cable is recommended?

PLiXiR Power Conditioners do not come with a power cable. You can use most good-quality IEC C13 or C15 cables to benefit from the performance. You could consider popular cables such as: Nordost Purple Flare https://www.futureshop.co.uk/nordost-odin-2-uk-mains-power-cable-with-qsa-silver-fuse-1 Best when used with source components. Nordost Blue Heaven https://www.futureshop.co.uk/nordost-purple-flare-3-figure-8-uk-mains-power-cable-1 Better when used with higher current components such as amplifiers or subwoofers