I can help but remember when one of the audio power amplifier manufacturers had fun with the "Golden Ears" crowd. Evidently they hooked up 5 or 6 amplifiers including a couple of tube amps, a Carver Magnetic amp, etc with a high end input and speakers. There was a big switch which allowed you to "select" the amplifier. Many of the people present could "hear" the differences between the tube amplifiers, the Carver Magnetic amp and the more standard solid state amplifiers. At the end of the listening session, it was revealed that all the switch positions were connected to the same Carver Magnetic amplifier. I ranked them with the crowd that used a marker pen (preferably a green one) on the edges of CDs to improve the sound.
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