The claim usually made goes something like this:
The person buys new amp, and it sounds better than the old amp based off of an uncontrolled listening test, usually after unplugging one, and listening to the other, begging the question that this process is the least bit reliable. It’s not. It’s less than worthless.
1. Human hearing is easily fooled; yes even yours.
2. No one can control their subconscious biases.
3. Cost matters, but only to extent; transparent amps are easy to make, fairly inexpensive, and abundant.
4. Exotic manufacturers routinely add very subtle coloration to their amps.
5. Your room, speakers, and the production of the media will have gargantuan colorations.
6. If you want tone controls, use your damned tone controls, not some baked in coloration with the amp.
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