attenuators 有無用?
在老外forum 讀到一D文章, 說如果你個amp 個 volume control 長期只用到9點10點,咁其實個amp既真正實力未能發揮(動態小左), 加attenuators 在RAC/XLR 減10個db, 話加番大個volume 會有改善, 有無人有經驗?http://www.ekmpowershop16.com/ekmps/shops/rothwellaudio/images/in-line-attenuators-2-p.jpg 本帖最後由 yinlung 於 2011-11-30 16:35 編輯
http://en.wikipedia.org/wiki/Attenuator_%28electronics%29
Resistor?
我估會失detail.... Resistor?
我估會失detail....
yinlung 發表於 2011-11-30 16:30 http://www.post76.com/discuss/images/common/back.gif
個AD就咁講:
Here's the solution to a problem from which far too many audiophiles suffer - too much gain in the system. The symptoms are easy enough to spot - the volume is plenty loud enough with the volume control set to the 9 o'clock position, too loud with the volume control at 10 o'clock, and fine control at low levels is impossible. This may seem like nothing more than a minor irritation, but in truth the performance of the system is being compromised. Although potentiometers work reasonably well over most of their operating range, they are notoriously problematic at extreme settings. The most obvious problem is channel imbalance - one channel will fade out (or fade in) quicker than the other, causing the stereo image to shift to one side - but on a more subtle level, the music may sound veiled and indistinct with the volume control turned down to the point where it is nearly off. Some people have tried to cure the problem by fitting a more expensive volume control only to find that it doesn't do much good. That's because the volume control isn't really the problem.
It’s the excess gain in the system which is the real problem. That in turn forces you always to use the volume control over a very limited portion of its travel. What's needed is a way to reduce overall system gain without compromising sound quality and without major modifications to the equipment itself.
The Rothwell In-Line Attenuators are the answer. These audiophile devices simply plug into any input sockets and reduce signal levels by 10dB. They can be used with integrated amps or pre/power amps, and are compatible with equipment over the entire price spectrum, from budget to extreme high end.
When used with integrated amps (simply plug them into any input sockets, then plug the source component into the attenuators) the volume control will be two or three "hours" further round its range than it was before, giving better control at low levels and operating well away from the end stops. When used with pre/power amps, there is an added benefit... 幾錢?不如你買黎試下 幾錢?不如你買黎試下
benjamin 發表於 2011-11-30 17:21 http://www.post76.com/discuss/images/common/back.gif
$3-400 hkd only 講明係ad，如果話無用，又點會有人買？？
信者自誤吧！ {:6_138:}師兄不如 認真買對返黎試下
試完再出個包膠毒下d師兄 師兄不如 認真買對返黎試下
試完再出個包膠毒下d師兄
qk8082900 發表於 2011-11-30 19:17 http://www.post76.com/discuss/images/common/back.gif
要等部DAC到左先,可能要過左年先.....{:6_150:} 講明係ad，如果話無用，又點會有人買？？
信者自誤吧！
moliu 發表於 2011-11-30 19:12 http://www.post76.com/discuss/images/common/back.gif
吾係掛, 廣告不能盡信,又不能完全不理wor ching 回復 1# Lester
正常的，個amp不是linear。