哪些牌子的电源处理器比较好呀? [复制链接]

http://www.exactpower.com/reviews.html

摘要
我认为应该把稳压和滤波的分开来看, 因为很多人不用滤波的部份
有了专线, 如果没有在电源容易被干扰的区域, 我会建议只用稳压就好
有一些滤波功能在滤去电源中噪声的同时, 高频也跟着消失无踪了
当然, 如果您的系统加了滤波的部份会更好也是喜事一件.

这三个厂牌我用过Burmester, PS audio, 出现的音色不同
Burmester会呈现一个温和浓密的中高音, 潜得很低但是不多的低音, 中音变的比较温暖, 但是高频的量感会比较少掉一些, 要说比较干净, 也可以这么说,
PS Audio 会有惊人的低频出现, 量和质都相当好, 中高音的能量感也会比较好, 会觉的中低音的狠劲增加了, 中高音的部份量会多出来, 但如果系统本身比较"粗声"的话, 可能会有减分的效果, 高频的延伸比较Burmester来说, 差相彷佛, 但比前者来的亮一些.

我个人喜欢PS Audio, 虽然搭上它可能有衰声的机会, 但罪不在它本身, 应该改的是其它的部份, Burmester也是传统大厂, 我的系统不适合它的音色, 不代表每一个系统都不合, PS Audio的价位一向偏高, 这让我想起以前的Power Block 和 Titan, 贵得没人性, 但...也只好照买.
有一个小小的心得跟大家分享 : 不要真的如说明书一般把所有的东西都插上去, 要一个一个比, 我自己的结论是一个电源处理器给一个器材用, 才能有最大的效果. 有时, 二台一起插上去, 比不用还糟, 这一点尤其插上去的是数字系统的话, 更要小心.
我所知道的"电源再生"的市售机型, 目前有PS Audio, Exactpower二家
前者容量余裕大, 使用上可以调要的电压, 比较方便, 但价格贵一些, 后者比较小的容量, 固定只输出120V, 不能调, 但便宜一些
二者的声底是很类似的.
我个人使用ps audio　 跟尚未使用前最大的感觉是低频下潜的很深　而且差别很明显　马上就听的出来
我曾用brumaster的cd-3测试第十首的第一鼓　分别插在专线及ps audio上　那种深沉结实的鼓声听感却很轻松愉快
ㄝ诚心请问一下耳医师一个电源处理器给一个器材用　那风扇发出的噪音会不会很大
tcc737兄, 这是我之前比较Exactpower EP-15A的过程, 请您指教

原作者是eardoctor
Exactpower电源处理器

以前没有时间弄电源的部份, 随便也就接着听, 一晃也许多年过去了, 最近比较有时间, 就拉了二条专线, 一条8平方, 给前级, 前前级, CD, LP唱盘用, 一条22平方, 给二台后级用, 都是接在Wattgate的插座上, 电源线除了Basis唱盘用YBA Diamond外, 其它都是Siltech Ruby hill G6, 一时之间也获得不小的改善, 总算花的钱不多, 好处却也不少, 也让我高兴了好一阵子. 最近看了书, 也听了许多前辈高手的经验, 知道除了喂饱电之外, 还要有干净电源的观念, 但是, 会差很多吗? 这是很多人的疑问, 因为电源的处理器都不便宜, 少则数万, 多则如PS Audio数十万都有, 如果没改善( 应该不会)或说改善得不多, 会让用家颇为苦恼. 于是我就试了Exactpower EP15A的电源处理器, 主要是看上120V的稳压, 还有据说是除了PS Audio之外唯一做电源再生的厂机云云 ( 听听就好, 不用认真求证, 因为有效最重要 ), 它有三个Analog, 三个Digital output, 一共六个档, 就以这二组和职接插电源专线还看看, 所以这是一篇我的心得分享, 不是和别台机器的比试报告.


我主要比较的方向有几个, 不过说真的, 好累喔.....
对前级有没有效?
比较的标准是直接把Siltech 电源线插在8平方专线上, 其它的CD, LP唱盘,前前级都还是插在Exactpower上.
先说接在Analog output上, 声音背景一下子变的很安静, 东西彷佛从黑暗中一下子冒出来, 高低频的声音变得很干净, 我观察的重点是会不会让声音变瘦? 答案是不会, 没有什么特别的改变, 音色上差不多, 中高音的下段( 像女声的低音部份的泛音 )透明度好大约30%, 但是有一点, 声底变得比较斯文, ARC那种粗旷的豪迈, 大开大阔的声底受到了一点挤压, 声线的边缘变得更平滑了, 这是变好还是变坏, 可能见仁见智. 是原来卖力演出的声撕力竭, 原来是吃电不足的"特殊调味"吗? 我不喜欢这种斯文的声音, 我喜欢ARC就是喜欢它热情奔放的特质, 但是背景宁静度的改善又是那么的显著, 让我难以取舍, 反复开关系统数次都难以决定.
前级改插Digital output的插孔,背景的宁静度更高, 声音的走向和插在Analog output一样, 但是, 声音从上到下都变得比较瘦, 这又是一个青蔡萝卜的问题, 我是投反对票的, 所以不考虑.
换掉Expactpower的电源线, 改用Siltech Ruby hill G6, 哈哈哈, 前级插在analog output, 哈哈哈, 这个好, 之前宁静的背景差不多( 并没有超越接在digital output档时 ), 但是稍微受到挤压的动态和音场完全恢复正常的水准, 如此就是我喜欢的走向了. 音场更为稳定, 声音的密度改善最为明显, 有10%以上.

唱盘有效吗?
唱盘的比较是以插在8平方专线上为准. 比试时Exactpower使用Siltech Ruby hill G6电源线.
声音的能量变得比较松软, 比较容易听, 但相对的, 穿透力变差了, 能量感变得比较不好, 中高音的厚度一下子往上拉, 透明度改善5%, 高低的延伸变好5%, 但是音乐流动的感觉不如直接插在专线上, 这时接到高手前辈的电话, 据说上次在别场比试无意间把VPI TNT唱盘的电源插在Digital output上, 异常好听, 交代一定要我试试. 前辈之言, 莫敢不从, 依言把Basis唱盘YBA 电源线插在Digital output上, 声音一下子变得很光滑, 毛边几乎都消失了, 高低音的延伸变好, 但是我发现, 中高音的上段, 也就是女声的唇齿声或是小提琴的高把位, 变得有一点过度强调的顷向, 管乐的光泽变好但也多出了一丝火气, 虽然比较刺激, 但是最后我还是以直接插回专线定案.

对前前级有效吗?
比试标准是以直接插在8平方专线上, 和Analog output相比. Exactpower使用Siltech Rubyhill G6电源线
接在处理器上以后, 另我印象最深刻是音场一下子变深, 变的很稳, 透明度在中高音的改善是10%, 但是低音的量感变得少了一点( 约5%), 全频段的厚度上没有特别的差异, 在音色的差异上不及前级明显, 但也算是加分的效果.

对CD有没有效?
Burmester001我的标准来看, 最大的问题出在几个地方, 极低频声音不够凝聚, 音像的边缘不够清楚, 和低音的解析力不算好, 所以我特别注意这几项是不是有改善, 一接在Digital output檔, 低音的松散获得10%的改善, 音像的边缘比较切得干净, 可是音像变小了, 在调高可变输出后, 音像的情形有改善, 但中高幼细程度有所损失. 低音的解析力上我倒觉得没什么差别, 整体来说, 音乐的流动更为明快, 我对001使用在这台处理器上的评价是正面的, 但幅度不是很大, 光为了这一台CD要不要买Exactpower, 就因人而异了.

结论 :
1. 有120V美系机器的用家值得考虑,
2. 原场电源线真正两光,可以直接丢弃不用 请喂一条好一点的给它用, 由于用Siltech Ruby hill G6有明显改善, 我正在认真考虑是不是要买入Siltch Ruby Moutain G6 或 NBS Monitor 0 给这一台Exactpower使用( 电源线贵过机器 ??? )
3. 大部份的改善都是全面的, 少数因为个人的口味可以自行斟酌改变, 电压不稳或比较脏的地方改善程度应该会更大, 我所在的位置是医疗管制区, 以前的度量电压在113v~117v之间, 很少变动, 当然, 呵呵, 和大多数发烧友一样, 我就是觉得每到半夜比较好听 ( 那时多半有115v以上 ), 才会兴起试用Exactpower 15A的念头.
4. 电源处理器一样要run, 我觉得run好后, 高频的延伸应该可以更好, 一些全频段厚度改变的现象会减少, 甚至应该更厚才对, 为了证实我的想法, 我决定真金白银买入一台, 有机会再向大家报告后续的心得.

ps: 这一次总共开关系统拔插测试17次, 手指都快破皮了....
试听软件:
Central Stage/Wilson audio( LP ) 舞台音场和管乐质感
Sarah Maclane/X情人主题曲 ( LP ) 女声的厚度和低频的延伸
Rossini Strings/Accardo/Marriner/St.Martin/Argo ( LP ) 虽不是首版, 但弦乐的质感仍然很惊人.
内田光子/Mozart piano sonata/philip ( LP ) 虽然是近期的录音, 音色上捕捉得相当完整.
蔡琴/民歌 ( SACD ) 第二首的风铃看高频瞬时反应
Stokowski/Rhasody/RCA ( SACD ) 第二首开始的低频背景噪音

谢谢耳医兄详细的解说 兄为追求尽善尽美的声音 　对手中任何铭器铭线的研究态度精神　实为我学习目标
对于此篇我详读再三　我ㄝ曾为听一个音反复拔插数次　以确认其中差异处　但功力远远不及兄了
我的住所只能拉八平方的专线(22平方完全无法拉入管线内）我试过将前级分别入专线及入psaudio内　还是感到入psaudio内背景较深声音干净度较好　故应是用电问题因环境而异
对于在半夜才会觉得比较好听　真是心有戚戚焉　除了半夜用电较少可提供好的电力外　夜晚寂静较不影响听感　还有　人在夜晚比较感性ㄝ是主要的原因吧　　在我的环境里常常觉得半夜才有办法听到感动的声音
再请教一下耳医兄　兄对于所有的声音细节提升或减少予以百分比数据化　除了根据听感形容外　是否有一套自用的标准可供分享　诚心请教

感谢alan兄的转载文章，写的真的非常客观。
看完eardoc 兄完美不妥协的比较，我也分享一下小弟的经历。
从最早的 monster cable 到 ps audio，和大家一样，一路上陆续使用过 api，古河，mit，当然和一些小厂自制的排插。

大部分的声音都没有什么大改变，只觉得有surge 保护，除了在打雷的夜晚睡的比较安心之外，就是品牌和机身的美感，差点快忘了他们的主要功用 - 电源。
直到使用 mit z center，是第一次感觉电源让声音改变的不同。50+ lbs 的电源处理（power conditioner）真是非常有份量。测试的结果，果然不错，低音表现更紧，更低，中高音更亮，成果是音场变得庞大，非常有mit oracle 线材的感觉。一台上有10 个插头（2 隔离，2 unswitched，6 switched）对大部分的系统是足够了。可是要stereo 和 剧院 两系统都插上就有困难了。

之后在友人（加拿大小线厂vd - rick） 的教导下，决定拉音响房的电源专线。由于有点难度，花了3个多月的时间，磋商，设计，棌购，和安装。系统上安装了20 amp 的电源线，和 hubbell 医院级的电插头，全部的线和插头都被送去 cyrogentic 处理，和 cable cook ，最后花一整天的时间安装。全部完成后，一发声，有点失望。或者是说，和 mit z center 没有太大的差别，虽然装上 z center后，声音已经有改进了。唯一的优点是，全部的amp 都有独立专线，但是总还是期待些什么。经香港电工师父开导后，寻思安装独立电源专线的目地是和家用电器分开，但是从发电厂到社区电箱再到家用电箱这一大段还是有许多必然的干扰，是无法避免的。所以我认为在电源处理上的王道是 ac transformer 或者ac generator （最干净的电，除非有人使用家用的发电机或者大电池-jeff rowland设计）。

在参考了许多高手的经验后，决定加装transformer 在电源上。又因为空间和技术上的难度，最后简单的选择了ps audio 300，只供电给 digital source使用，如pan兄描写的，ps audio非常有个性，声音变得非常干净，更明亮（mbl 用家对这感觉是很敏感的）背景更黑，细节也提升很多。对我来说，我非常喜欢这种声音。当然，它还是有它的缺点，如我提到的 能量效率低，约50%效率，高热 （所以风扇或者散热是必须的），和噪音 （听说transformer 噪音较大，老手们将他们安装在另外的房间，ps audio 没有这问题，但是风扇还是有声音，我耳朵不好，但是距离20 ft（6公尺） 外安静状态下，还是听得到风扇吹出的风声）但是这些缺点和 p300 带来的进步相提下，一点也不在乎。

在寻找电源的路上，希望已经结束了。小弟的愚见是，音响路上没有快捷方式，后级在稳压和滤波上可以经过 power conditioner 得到最好的解决。无论是 mit z center，transparent power bank，还是高档的 burmester 或者 nbs ，应该有非常惊人的表现。而 power generator 的功用还是无法取代，如果要最纯的电源，或者是再生电源，ps audio ac generator 的设计还是有它的地位。
最后编辑 edwardku 在 11-05-2004 的 05:03 AM
附议: PS AUDIO 的P300 是我用过最无悔的器材.
用在DIGITAL SOURCE 上, 我的心得是, 再也不搞线材了, 一个MODE的切换
就把蔡琴"机遇" , DIANA KRALL 的 when I look into your eyes (SACD)
(我的人声测试片) 推到我不曾到过的境界. 很难形容... 可是真的知道那就是对的声音... (如何说是对的, 一般而言这两片我在朋友的系统上听起来的感觉是有被口水喷到脸上, 包括在风华再现的那场, 但是我用P300的结果是, 两位歌手在我面前深情的唱歌,婉转曼妙...)
后来人懒了, P300被我超坏了(接个后级结果烧机), 改听LP 了, 就不太在意这件事了(是LP 要调的事就太多了). 直到前几个星期才打电话给师傅请他帮忙修.

Richard Gray 还不错，cp值满高的。
因为 richard gray 的设计不同，它（自家设计）说把 Richard Gray 插入插头后，可以改变整个 power 线的ring。所以，power amp 可以直接插入墙插头，而source component 插入rg 的插头。
我比较的结果，声音比没有使用时干净许多。但是，只比较source component的部分， 我还是觉得 ps audio 比较亮丽，video 画值也比较好点。

价格来看，ps audio 比rg 贵了许多，所以也许比较是不公平的。加上rg不只可以用在 source，也可以用在 amp上，所以我觉得满不错的。
如果你有兴趣，请把你的email给我，我forward richard gray 老板给我的email 和指示 供你做参考。

[upload=jpg]Upload/2005461054934971.jpg[/upload]

日本 CSE 电源净化产品正式莅临香江

撰文及图片由产品代理「 Audio Extreme」提供


位于日本岐阜县之音响配件产品制造商 CSE，全名为 Chubu System Engineering Co. Ltd.，现正准备登陆香港及国内。已拥有十八年经验的 CSE，以设计与投产用作音响之电源净化器及导电配件为整公司的经营主流，对此类产品绝对是技俩十足，深受日本发烧友爱戴。
CSE 产品种模拟一般同类型的生产商为多元化，产品一共分为以用作电源净化功能堪称 Isolation Balance Former 的电源隔离变压器。和另一种将电源完全地以电子电路处理过的 Isolation Generator。此外 CSE 亦有多种引进不同调声技术的电源「拖板」和自行设计的电源线和插座插头。还有两款非常独特名为 Musicaionizer 的负离子音场处理器。由于产品繁多又拥有特别技术的关系，故今次先为大家简介 CSE 的隔离式变压器，其它的产品及技术就有待日后再为大家报告。
电源隔离「火牛」，故名思义是已利用变压器将电源经过进行净化及过滤，从而获得更佳的电源供应。回放音乐的好与坏，相信大家亦知道，电源的质量要求是必定的关键之一。
而「火牛」本身的设计和优点亦就是此类隔离「牛」净化器的命脉，而一般的变压器都是采用金属片块成再绕上铜线圈及加入接线而成，但 CSE 的变压器是完全颠倒过来，将铜线绕制后藏入于一个特制「空心」管状式金属圆柱内而成，这种设计名为 W.B. Trans。这项独特变压器设计，其实是由美国通用电气公司于 1930 年开发的。这种特殊变压器技术能更有效减低变压器通电后会产生的电磁波，以及减低其对音响器材的影响。可惜因为制造这种特别管状形钢柱成本太高，而且造出来的「火牛」体积往往都是太笨重关系，故通用公司就终止这项生产。直至十年前砌割金属技术大幅度改善能造成相当于「菲林」厚度的钢片，所以就被 CSE 引入此技术，利用此超薄钢片重迭后，卷曲成管状再藏入线圈以解决上述之问题。其后 CSE 于 2000 年初正式采用这种 W.B. Trans 变压器于自己的电源净化产品上，加以改良直到今时今日。经改良的 CSE 隔离「火牛」选用高质素的 OFC 铜线作「火牛」之线圈及灌入适量的凝固性阻尼物料于「火牛」上以减低谐震。
另一样秘技是线圈本身亦分成内，外两组藏于钢片管里，而内线圈设定为输出组，作用是利用内组线圈的较短导电距离以减低输出电压的内阻抗。除此外， CSE 的隔离「火牛」也引进另一项称之为 Zero Cross Switch 的技术，这种电源开关保护电路，可以将电源供电的一剎那间，电压所产生的瞬间脉冲滚降，作出有效的导绝。
另一样突破性的优点，是每个型号的「隔离火牛」都能因应需要地能提升多 4% 电压输出，那么忧虑因电压负荷过重以至电压不足的居室，从此不再烦恼。而且就算有足够电压的情况下采用这个纠正功能，也会把电压提升至 230V ，令原本生产适用于欧洲电压为主的器材，发挥出最优秀的表现状态。还有一样名为平衡电相功能，当接上此电路时，输出电相会将接地放于插座的水线位置里，而电压就平衡地分布插座的两极里，构成平衡式供电状态。换句话说，就能彻底排除了因电源倒相所带来对音色或画质的表现折扣。
CSE 平衡式隔离变压器，分别有四个型号，为拥有 1000 及 2000W 输出的 TX1000，TX2000 和可处理较大输出的 TX2500 ( 2500W 输出 )，每个CSE 的隔离「火牛」均配备有多个 220V 输出外，更提供两组 100V 电压的输出，以方便大家使用。
最近已跟总代理证实，首批适用中，港，澳 200V 的 CSE 平衡式隔离「火牛」会于五月中正式到港，要将自己器材进一步发挥的朋友，请从速到有关经销商订购。
[upload=jpg]Upload/2005461063663674.jpg[/upload]TX-1000 / TX-2000 的背面
[upload=jpg]Upload/200546107010451.jpg[/upload]TX-2500 的背面

STEREOSOUND上好多介绍的

[upload=gif]Upload/200546102670501.gif[/upload]

manufacturer: ExactPower
model: EP15A
category: AC Power
review date: August, 2002
reviewed by: Bryan Southard

ExactPower EP15A

The ExactPower EP15A is a power component designed to regulate and improve the quality of the AC power that is supplied to your audio/video electronics. Most people simply purchase electronic components and plug them into the wall, never even considering that the performance of their A/V systems could be severely limited by the quality of the power that their homes provide. The ExactPower EP15A is a product designed to address this issue directly. The EP15A physically measures 17 inches wide, 14 inches deep, has a 2U rack height of three-and-one-half inches, and weighs a solid 30 lbs. The EP15A provides 1,800 watts of regulated power and provides eight high-quality receptacles for connecting you’re audio/video gear. The front-display exhibits output voltage but can be toggled to display output current or output power if desired. The EP15A sells for $2,499.

I give the aesthetics of the EP15A a high grade, with its sculptured front bezel complete with rounded corners and nicely fitting cover. This unit looks great, is reasonable in size, is rack-mountable and looks like a piece of fine electronics rather than an industrial power junction box. My only complaint about the fit and finish is that the cover sounded tinny when tapped, perhaps needing a couple additional screws to secure it.

It is a fact that nearly every home suffers from the effects of less than excellent AC power – especially in California, where I reside. This might not be readily apparent, because your hair dryer and toaster will still function without pure AC, but your A/V system will suffer. Whether you have a $15,000 system or a $150,000 system, the improvement to your sound and video when supplied clean, quality power is nothing short of dramatic. Power improvement devices are no longer tweaks for audiophiles, but rather intelligent electronic components for anyone that wants to reap the most from their beloved A/V gear. The problem that plagues this sector of the audio/video industry is the lack of consumer knowledge, along with the A/V retailer’s inability to demonstrate the benefits that these products provide. Admittedly, poor and ineffective power conditioners of days past have also added to the general consumers lack of confidence in such products. There are several approaches to improved power ranging from units that merely filter ugly power to very elaborate devices that regenerate waveform and even alter voltage and frequency.

Features and Technology
The ExactPower EP15A provides voltage regulation, maintaining a constant 120VAC output within one percent, when supplied loads of between one and 15 Amps and incoming voltages of between 95 and 130V rms. This is incredibly important, as power is like water traveling through a hose. Running lower or inconsistent voltages is like turning your faucet valve on only partially, then trying to hose down your patio. The EP15A is not current limiting the way that some AC products are. Once the maximum current of 46App has been consumed, output switches to the wall. Additionally, the EP15A has an internal, high-efficiency amplifier used to correct poor or damaged sine waves. It does this by taking the input signal and comparing it to a 60-cycle wave created by a reference sine wave generator (oscillator). Then its comparator circuit identifies differences in the wave and proceeds to use its internal Class D amplifier to make the repair. It does not regenerate the sine wave; it simply fixes it. This is a key to understanding its efficiency. When untreated waves are viewed from an oscilloscope, you will see that the tops of the waves are consistently damaged. The damage occurs at the peak, the location that produces the highest voltage. This damage limits available power and certainly the duration of peak voltage. By correcting the peak, you achieve more consistent power and much lower impedance. This design is very attractive for its inherent simplicity and efficiency. Many AV industry friends, whom I have told about the review, say that the ExactPower seems just like the PS Audio Power Plant products, but they are understandably mistaken. The PS Audio Power Plant is a power-regenerating device that takes the raw AC power from your wall, converts it to DC, then using a DSP-based reference waveform generator, creates an entirely new waveform, both regulated and low in distortion. Additionally, the PS Audio Power Plant products have MultiWave capability and other features that significantly differentiate the two design philosophies.

The Music and Movies
Throughout the time that I auditioned the EP15A, it provided improvement to my system void of negative side affects. For example, the entire Beatles Abbey Road release (Apple Records) was a musical awakening. In the cut “Here Comes the Sun,” the images became much less bloated and took on a liquid, unveiled presentation. Vocals were more present and there was greater separation between the guitar and vocal accompaniment. Songs like “Maxwell’s Silver Hammer,” were transformed into very clear and lively musical events that had sounded a tad constrained and clouded before I installed the ExactPower EP15A.

I recently moved into a new home and had been running untreated power while trying to dig through the many boxes to find and connect my Richard Gray’s Power Company 400S’ that I have been using for reference. As I connected the EP15A, its effect was stunning. Immediately, images appeared more detailed and less forward. There was a huge reduction of unnatural bloom and artificial sonic puffiness. Musical images were less strident, yet very immediate. This is more commonly referred to as audible transparency. There was also a lack of noise that left the music sounding more pure, less veiled and more realistic.

From vocalist Alison Krauss, and album Now That I've Found You (Rounder Records) on a song that takes my breath away “Oh Atlanta,” the difference was as shocking as a February swim in the Arctic Ocean. Krauss’ voice beamed with much improved detail and definition. There was additional resolution and the focus was profoundly tighter. She stepped from the studio and into my listening room for a personal performance with the ExactPower plugged in. This difference was not merely something that would be discernable only to professionals with trained ears. This was an improvement that recent houseguests of all backgrounds were able to hear immediately. In direct comparison to the three RGPC 400Ss that I typically run, which cost $795 per unit (for a total of $2,400), the EP15A provided greater instrumental separation, quieter passages between notes and improved all-around detail.

Video suffers equally from poor or insufficient power, as its current demand is extremely high. When video sources are starved of the necessary power they require, symptoms can range from washed-out color to lack of contrast. With CRT projectors, you can even experience conversion shifting and other very difficult issues, depending on the severity of your power problems. Because of my recent move and the fact that my reference video system has yet to be re-installed, I packed up the EP15A and headed to a local retailer, who agreed to allow me to connect the EP15A through the front video projection system, in this case a very worthy Sony G90 nine-inch CRT projector. This test was equally dramatic, as images became immediately brighter with sharper edges and enhanced three-dimensionality. Before trying the ExactPower on the G90, the video image at the dealership looked incrementally more distorted and confused. With the EP15A, the image looked clearer and more resolved. In the movie "Dinosaur" (Walt Disney Home Entertainment), the segment in which the baby dinosaur emerges form the egg exposed much-improved, lifelike details such as hair flowing in the wind. These elements were finer, more realistic and better defined with the EP15A connected. No A-B comparison was necessary; the EP15A was an obvious improvement. Colors were brighter, focus was improved, blacks became darker, and edges were notably more true to life.

Back at home, I took the ExactPower from my reference A/V system and placed it in my more moderately-priced living room theater. This was an important test to determine whether this was a product best suited and limited to high-priced A/V systems, or whether it was a worthy investment for more affordable systems. Listening to the rock classic Paper Money, Montrose’s second release (Warner Bros), and the song “Connection,” Sammy Hagar’s voice had much better definition and clarity. Occasional crunch in his vocal cords identified a solid resolution improvement. The guitar had improved timber, again providing more transparency and dramatically better sonic separation. After connecting this system, a setup that has a retail value of below $6,000, I would only recommend it for systems in the $10,000 and up range, despite the improvements it made. Why wouldn’t I recommend it for everyone’s system? The answer is relative value. The ExactPower wont make a $699 receiver sound like a $2,999 Anthem AVM20 or make your old CD player sound like a DVD-Audio player. However, if you have a pretty strong AV system in the making, improving your power situation is likely to unlock a not inconsequential amount of performance for you that you currently do not have.

Downside
The EP15A is built very nicely, but the less than solid top cover separates it from the build quality of the very best. The EP15A also provides protection from power surges but not from lightning strikes. This is an advantage of the Richard Gray’s Power Company products, which I ultimately used along with my ExactPower EP15A during the review period. Additionally, because The EP15A is active and subject to possible electronics-related problems, you are forced to rack or stand-mount the unit. This is a particular concern when dealing with ceiling-mounted video projectors, as you are then forced to run a power cord to the EP15A. Both the RGPC products and PS Audio Ultimate Outlet are passive products that allow you to bury them into the ceiling or attic.

Conclusion
The ExactPower EP15A is smartly designed both electronically and mechanically. It burns little power, is extremely efficient and provides sizable sonic and visual improvement. Its price point is such that it is a viable consideration for systems costing from $10,000 to mega-systems costing $100,000 and more. It has the power capacity to handle the biggest of amplifiers and enough receptacles to plug in most, if not all, of your A/V gear. When compared to the previously reviewed PS Audio P600, it does not match the P600’s ultimate performance. I found that with the properly selected waveform, the P600 supplies quieter passages, greater dynamic range, and slightly more transparency however the P600 does not have the available power to run many amplifiers that I owned and auditioned. The EP15A is smaller and much more efficient than the P600. For direct competition, you would need to consider the PS Audio P1200, a unit that is as big as a storage trunk and burns enough power in idle mode to light much of your house, not to mention having a price tag that is almost twice that of the EP15A. If cost and size were not a consideration, perhaps the P1200 would be my choice, but for my room, system and budget, the EP15A makes considerably more sense. It runs much cooler, consumes less power, fits in my rack and performs magnificently.

If you are ready to hear and see a discernable difference in your system, give ExactPower a shot. To this reviewer, who has danced the dance with the best AC power products on the market, passive and active, the ExactPower EP15A is the queen of the prom.

reference software: • The Beatles - Abbey Road • Alison Krauss - Now That I've Found You • Montrose - Paper Money • Dinosaur (DVD)

manufacturer: Exact Power
address: 9411 Winnetka Avenue
Chatsworth, CA 91311

phone: 866.392-2922

fax: 818.886-0504

email: info@exactpower.com

website: www.exactpower.com

comments: email AudioRevolution...

你也有觉得贵的东西啊
难得啊,大哥,呵呵

楼上贴的是撒牌子的啊/

资料
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