麦景图工程师对线材、功放、音源作用的分析
http://www.roger-russell.com/wire/wire.htm作者Roger Rusell是Formerly Director of Acoustic Research at McIntosh Laboratory, Inc.
原文较长，节选部分原文
Several speaker wire manufacturers make wire that has high capacitance yet almost none of them publish exactly what the capacitance actually is. Capacitance is of concern not so much that it could cause a possible high frequency rolloff but that it can affect the amplifier feedback and cause the leading edge of transients to overshoot. This in turn can make an audible difference in the system sound. It can make the sound brighter, which some audiophiles mistake as greater detail.
The degree of influence when using high capacitance wire depends on three factors.
1.The total capacitance of the wire used (capacitance per foot times the number of feet).
2.The complex impedance of the speaker being used.
3.The stability of the amplifier being used to drive the speaker.
When there is an audible difference in speaker wire due to wire capacitance, it can be interpreted as an improvement when one wire appears to have more clarity but is actually altering the sound and departing from accuracy. Perhaps this change in sound then paves the way to sell more wire. Further, perhaps the wire companies already know this and what will sell.
喇叭线对声音的影响取决于线材的电容，喇叭的综合内阻和功放的稳定性。有些喇叭线故意设计成具有高内阻值，有可能会听上去更明亮一些，但是那是失真的表现，却可能被认为是听到了更多的细节。而且一台设计良好性能稳定的功放，是很少会受到线材电容带来的影响。只有那些稳定性较差的功放才可能会带来显著的影响。
Many owners of high-end audio and video equipment value “oxygen free” copper. Behind this demand is the belief that it will have enhanced conductivity or other electrical properties that are significantly advantageous to audio signal transmission. However, as indicated above, most C11000 common copper sold today meets or exceeds the 101% IACS conductivity and overlaps C10200 “oxygen free” that has a minimum of 100% IACS conductivity. In practice, there is no significant difference in conductivity between all three of the grades as far as audio use is concerned.
It can be solid, stranded, copper, oxygen free copper, silver, etc.--or even "magic" wire--as long as the resistance is kept to be less than 5% of the speaker impedance. There is no listening difference as long as the wire is of adequate size. Bear in mind, as previously mentioned, a well-designed amplifier will not have a problem with any of these wires.
符合国际标准纯度的铜对于音质的影响是很小的，甚至最普通的C 10200（仅3N纯度）的铜就足够满足音响设备的需求。对于设计良好的功放而言，只要线材的阻抗不超过喇叭内阻的5%，是不会带来明显的听觉差异。
银线的导电性虽好于铜线，但是并无法带来声音的提升。
Looking at this from a different perspective, there will always be those who will want expensive wire, not because there is an audible difference, but because they may value pride of ownership and prestige in a similar way to that of owning a Tiffany lamp or a Rolex watch.
其他部分对线材的垫材，煲线器他都认为属于是this is just another way of making money. It can be considered as another “quack” remedy machine.
其中还有一个链接分析了功放阻尼系数的问题，那是Damping, Damping Factor, and Damn Nonsense 非常正常，ayre的已故老板，也曾经说过，他以前对线材，垫材这些都认为是骗钱的，从物理上来说没有区别，他说jeff rowland（这里是指个人，不是公司）介绍他认识cardas线材的老板cardas，知道对方是做线材这些，他很不以为然，后来认识深了，试用了cardas线材等后，才发现很多事情不能只用物理上去解释。 准确说，实践第一原则。原理只是为了总结实践方便复制。不能从可知的片面原理角度去猜。 维基百科说 铜的的导电性比银好很多。。。世界上导电性最好的是银包铜 没记错的话 具体好像说的是拿银填补单晶铜的晶格缺陷
页:
[1]