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發表於 2019-2-10 17:00:58
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本帖最後由 vhs 於 2019-2-10 17:02 編輯
Quote from https://www.mojo-audio.com/power-supply-faqs/:
"What is the difference between a linear and a switching power supply?
Switch-mode power supplies (SMPS) are in wall warts, external brick style power supplies, and all computers. The advantages of SMPS are that they are significantly smaller, significantly more efficient, operate with much less heat, and are significantly lower cost to manufacture. Smaller, cheaper, and more efficient...what's not to like?
The disadvantages of SMPS is they have significantly more noise than linear power supplies. The best SMPS have peak-to-peak ripple (noise) roughly equal to the most basic of linear power supplies. But ripple is not the only noise SMPS produce. They also radiate inductive noise that can be picked up by cables and components in close proximity. And they dump noise onto the common AC ground that pollutes the power of any component plugged into the same AC circuit.
Also, when compared to high-performance linear power supplies, SMPS have very slow dynamic response. When reproducing music, slower power supplies sound awkward and less liquid, restrict dynamic passages, mask micro-details and micro-dynamics, and distort the time and tune.
How does an ultralow-noise power supply improve computer performance?
All computer communication works on a system of checks and error correction (check sum). If a packet of data doesn’t pass the check, a new packet of data is sent to replace the original. The lower the power supply noise, the fewer bit read errors, the fewer errors to correct, and the greater the system resources.
When you free up system resources with a cleaner power supply a computer will perform as if it has a faster processor, faster storage drive, and more RAM.  When a low-noise power supply is used with a computer-based music server or streamer the result is more liquid and articulate sound, combined with greater depth, detail, and dynamics. "
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