電源再生的原理是, 先把 AC 轉為 DC, 再用把 DC 轉回 AC, 理論上輸出的 AC 應是極之純淨近乎完美.
但用家測試卻發現 P5 / P10 輸出的 AC 帶有雜訊....
市電雜訊
P5 輸出
P10 輸出
該作者說:
"Question 1: Since AC regenerators generate a new power sine wave, why does the manufacturer recommend using better power cords, vibration isolation devices and a passive conditioner between the wall and the regenerator?
Answer: While it is true that AC regenerators create a new power sine wave by filtering and converting the incoming "dirty" power to DC, then converting that DC signal to a near perfect AC signal, the process is not perfect. Some line noise still gets through as seen in the FFT plots above. The cleaner the power signal is before it gets to the regenerator, the cleaner the regenerated power signal."
原文: http://www.polkaudio.com/forums/showthread.php?126544-Studies-On-Residential-Power-Line-Noise-Part-10-PS-Audio-P10-AC-Regenerator
另一篇文章亦發現類似的結果: "In a follow-up email exchange with PS Audio’s Paul McGowan we tried to get these measurements explained. Apart from reassurances that the P10 does not filter in any way, the fact that all of a sudden there was high-frequency noise—that is noise above 60Hz—could not be explained. Somewhere the P10 must generate that noise (or act as its own antenna to receive it past its input which we knew to be perfectly clean). Here we have to emphasize that just like the PPP the P10 is not intended or advertised as a filter."
原文: http://www.sixmoons.com/audioreviews/bluehorizon/3.html
那麼, 問題來了...
問題 1 : 假如電源再生也不能去除的雜訊, 有其他電源處理器可以去除嗎 ?
問題 2 : 假如電源再生不能去除雜訊, 值得付這麼貴的價錢嗎 ? 還是用平價的電源處理器就夠了 ?
另外, P10 的用家異口同聲說需要用優質的電源線,
原文: http://theartofsound.net/forum/showthread.php?t=23305
這點亦有點違背電源再生所承諾的好處 (無論輸入市電的好壞, 都能輸出完美的電源) ....
實在令人費解...
