Tube Power vs Solid State Power


I continually hear Tube power is more powerful than Solid State Power. IE; “A 20 watt tube amp’s power is like a 60 watt Solid State Amp’s Power” and so on… Is this true ???

I always think of the “What’s Heavier, a pound of Feathers or pound of Rocks story?” A pound is a pound right ? 
Maybe someone could offer some thoughts and explain if this is true or not. 
Thanks
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Showing 1 response by gs5556

Not true because amplifiers do not put out power to the speakers -- speakers consume power. Amplifier power output is the dissipation of heat. To simplify, if a speaker presents a 4-ohm load to a 12-volt ac signal, the speaker draws 3-amps from the amplifier and converts 36 watts of electrical power to sound power and heat. If the amplifier can pass that 3-amp current through, then the speaker doesn’t care whether it comes from transistors or a transformer.