trs451797
New Head-Fier
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I've always wanted to know how a DAC actually work inside a headphone amp or any particular devices containing it. How does it actually improve the sound quality and all that?
Originally Posted by trs451797 /img/forum/go_quote.gif
I've always wanted to know how a DAC actually work inside a headphone amp or any particular devices containing it. How does it actually improve the sound quality and all that?
Before you get into sound quality the more important thing to know is that, unless you're Tank or Neo on the Nebuchadnezzar's multi-monitor rig and can read 1's and 0's and hear "oh there's a drum hit, there's another one, and now here comes the guitar solo...sweeeeeeeet" like when Tank went "I see blonde, red head...", the DAC is an absolutely necessary chip to have because you can't hear 1's and 0's at all. The DAC interprets that into an electrical signal, which is eventually amplified into a stronger electrical signal that can move transducers like speakers or headphones, which in turn move air to make the sound you can hear.
As for variances in quality, that has a lot more to with how the signal is handled after the DAC chip. Lower channel separation can mean narrower soundstage (not that one DAC rated for 110dB would be audibly worse than one rated at 125dB), in some cases you can perceive slightly louder as significantly better so some DACs and CDPs have line out signals stronger than 2v. While a 2v DAC complying with Sony and Philips standard might lose out to a sneakily designed DAC with 2.2v on a subjective test that doesn't measure for this at the start, I've owned a DAC that outputs 6.5v when USB is used and it sucked.