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其实厂线也是散线做出来的嘛,这个难度不高,现在好多高档线厂家都不再卖散线也是基于防止DIY散线对自身产品的冲击,也证明发烧友DIY与工人的手工制作并无本质差别。
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Van den Hul’s new AC power cable (in the next issue this cable will also be discussed in a broader test field, see extract below) is named The Mainsstream Hybrid and is a supple but thick cable (15 mm.) made up of Silver coated Oxygen Free Copper (OFC) conductors and Linear Structured Carbon layers.
7 c9 G6 P9 n+ pAbout AC power cables just as much fiction is written and recited as about other cables, so be cautious when frequencies are dealt with, which would or wouldn’t enter your amplifier through these cables.# G" u3 L- k8 A
No, the functioning of power cables for the most part is based on two important principles. Such a cable should simply provide enough current and per definition it is an antenna which radiates all Radio Frequency Interference (RFI) mess from — or receives and leads it into — the amplifier.
. Y, u O' @! P$ e5 ~5 e/ b$ OVan den Hul posits that, due to a cable’s series resistance and inductance, the current demand (the ‘current surge’) of an electronic device causes a voltage dip, as a result of which the buffer elcos of the concerned device get less well charged. The resulting ‘ripple’ voltage on the DC power supply increases and its spectral noise content will alter. This affects the residual noise floor’s level and character, and of course has consequences for transparency, definition, focusing and so forth.
7 y1 j2 B+ F% h# EInward radiation of RFI can be prevented by implementing the cable as a sort of filter for irradiation above say 1 megahertz. Normally spoken, high frequency irradiation is converted to frequencies within the audio band (through intermodulation) and these increase the system’s perceptible noise floor.) S; l0 a1 h8 d( j$ e" ]7 p; r
My experience with power cables is generally better than with AC power line filters. Anyone who thinks to be able to prove otherwise just can send me those things.
" ?% n! O) e$ ^During the last months I have equipped all my reference systems with as many Mainsstream cables as possible. Each time the experience was the same. Within the system arises an unmistakable clearly perceptible kind of ‘beauty’ in reproduction. Transparency, detail, quiescence, focusing and definition accordingly clearly increase. And that’s not because these cables suddenly introduce such qualities. Those qualities already are part of a good audio system. RFI and other interference mask those features by introducing a higher noise floor. The Mainsstream lowers the noise floor and therefore those qualities show to better advantage.; s8 T9 Z) x: L7 Q( Y6 v' p
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Conclusion
- L+ i- u1 {* b$ ZThe Van den Hul Mainsstream is a fine built AC power cable, that lowers the ‘noise floor’ in a convincing manner and clearly audible improves the performance of an audio system. 3 \$ }+ W' ?8 A! l: _, p& c
MusicHome studio, March 2001 |
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