Speaker wire resistance is negligible compared to tube amplifier output impedance

Evidence

One well-known high-end loudspeaker specified that it should be used with wire having resistance less than 0.2 ohms. This conscientious advice is admirable, but it means that the restriction is violated as soon as any tube amplifier is connected, no matter what wire is used. It is sobering to think that 10 ft (3 m) of the much despised 18-gauge lamp cord has 0.148 ohms resistance—much less than the output impedance of typical tube amplifiers. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1155

Categorization

• CANDY: Cheap lamp cord measuring 0.148 ohms vs. the 0.2-ohm spec is a nice conversational fact for audio fans.
• SHARE: Send to anyone who obsesses over premium speaker wire; this demolishes the premise in one number.