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发表于 2011-6-24 02:20:33
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原帖由 x-w 于 2011-6-24 01:58 发表 请教第三张的power cell是神马? UPC-200 input filter
The cleaner the power going in the cleaner the power going out. That’s true for a filter as well as a regenerator and the P300 is no different. The original P300 used what’s known as a Corcom AC filter.
The Corcom’s are used primarily for very high frequency noise rejection and found a lot in DAC’s and transports. The original filter in the P300 did a great job of cleaning up the over 1mHz noise generated by the P300’s power supply, but a UPC-200’s Power Cell kicks in at 100kHz, or 10 times lower and therefore is a much more effective filter. |
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