True about power doubling, but the real issue is not many amps sound nearly as good driving a 4 ohm load as they do driving a 8 ohm load or higher. This isnt just true of tube amps.
Current Questions
More and more, I see the word “current” in audio reviews. The reviewers warn me that I’ll “need lots of current” for a given speaker but they don’t explain exactly what it is I need or how many “lots” is. I’ve looked at a few “Electronics For Dummies”-type sites but I’m still confused. A few questions:
—What is current?
—When someone writes, “These speakers need a lot of current,” what do they mean? Is sensitivity involved? Impedance?
—On the amplifier end, what specification measures current?
—Are there subjective considerations at work in that spec? The number of watts doesn’t tell me everything about loud an amplifier sounds. Does the number of [whatever measures current] similarly leave things unexplained?
—Everyone asks, “How many watts?” No one asks, “How much current?” Is it really so important?