At minimum you need a power cord with a 20-amp IEC-C19 plug end and the other end with a standard 15amp IEC male plug. See AudioQuest Monsoon Power Cable (2 meters/6.5 feet) Power cable with 20-amp IEC-C19 plug at Crutchfield As a preferred upgrade, you should have a new 20 amp dedicated circuit installed (new 20 amp breaker, 12 AWG cabling and a 20 amp outlet. This would realize the full potential of the Audioquest Niagara 5000. The new power cable would continue to be compatible with the 20 amp upgraded circuit.
20amp v 15amp
I'm the furthest thing from an engineer so layman's terms would be appreciated. A friend of a friend has an Audioquest Niagara 5000 he's looking to move quickly. The 5000 requires a 20amp power cord, which is fine; I'm happy picking one up. My outlet is only rated for 15amps. My question is, will I only really benefit if I replace the 15amp wall outlet with a 20amp wall outlet?