The most significant variable usually being the necessity to match the volume levels to about 0.1dB, which can't be done by ear. When the new unit is played slightly louder these observations about stronger bass, overall clearer sound, bigger sound stage, etc, none of which can be accomplished by any amplifier at the same sound level, appear.
I thought volumes levels were not noticeable unless you went up 1db or 3db, I can't recall which? If it only takes 0.1db to notice better bass, clearer sound, and better staging, then why do we always hear that you need a 1,000 more watts to notice a difference? I missed something in this exchange.
