This video demonstrate how difference sound from cheap Power Cord and expensive Power Cord for Audiophile.
System:
1. Speaker ProAC DB1.
2. Amplifier : Naim Supernait 3
3. DAC: Denafrips Ares II
Power Cord/Socket:
1. Low cost Power Cord + Socket : Total cost ~$15
2. High cost Power Cord (Nordost) + Socket Furutech 80S NFC : Total cost: ~ $2K.