Apart from the 30 some ought bands of EQ, pretty lights, phase control, time alignment, etc, what makes a receiver superior to another in terms of sound quality only? Clarion. McIntosh. Nakamichi. All of these manufacturers carry dead heads; that is receivers with no internal amplification. And most people who run these do all their processing using an external processor. So why drop $1k on a receiver just to extract a signal? Is the DAC really that good? Is the DAC alone really worth a thousand dollars? Do you really need 8V to feed into your amplifiers? I ask this because I made note that I wanted to use my tablet as my receiver to a few audiophiles, and I was laughed at. I don't understand. All of my amplification and filtering are done at the amplifier. So all we are doing is comparing signals. Why is the signal coming from an aftermarket receiver so much better than the signal coming from my Samsung Galaxy Note 3. I do understand one is low level and one is high level, but that can be fixed using a converter. I also understand my tablet won't play digitally remastered discs. And one morething that might affect the quality: the signal coming from my tablet is already amplified. NowI have another question? How can a dead head pass a signal without amplification of some degree? Just curious why aftermarket head units have superior signals to those outputed from most tablet s.