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终于上了新LPF板!第一个感觉是声音很干净,背景宁静了很多,每粒音符每个细节都表现到,高频表现亦改善很多.整段频带表现都几平均,现在的1541dac终可以坐下欣赏音乐.[em09]
究竟这部dac去到甚麽级数呢?刚好有部名器Studer A727,一于来场比试!
<img src="attachments/dvbbs/2005-10/20051021215722870.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-10/20051021215722870.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
先讲讲部Studer A727是换左4粒金封opa627AM,再加左本论坛的晶振clock板,本身亦是用TDA1541dac.系声音表现上有一定的水准,不是普通的cdp可比.
hifidiy的1541 dac用左飞利浦850MKII做车头,(本想用Studer A727但它的数字output无法用到?)[em05]
<img src="attachments/dvbbs/2005-10/2005102121591882.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-10/2005102121591882.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
要并当然用好d,上了我做了并联dac子板,用2粒1541R1(同期的).胆用吹喇叭金脚7308军用版,output cap用好野cap(HOVLAND - MUSICAP).[em04][em04]
<img src="attachments/dvbbs/2005-10/2005102122152297.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-10/2005102122152297.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2005-10/20051021222152190.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-10/20051021222152190.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
前级是lite M7B板,后级是仿krell100全对称甲类,喇叭是ProAc studio 1仔.
[em06][em06][em06]
经过一番耳朶功夫,初步对论坛新LPF1541的声音有点体会,和A727两者声音取向虽然相似(大家都是用TDA1541),但在高,中频表现上就有较大分别.
在重要的人声表现上diy1541来得较有感情较甜美圆滑,而A727就较真实点,厚度A727略胜半分.
在高频方面两者分析力及质感都很好,diy1541还多了一份晶萤通透感(应该与输出电容用HOVLAND - MUSICAP有关[em04]),但A727始终是超取样OS及运放输出,在超高频diy1541怎也败下阵来.
至于低频方面是运放和胆输出的分别......[em12]
在营造音场上diy1541包围感较好,在size上A727就较阔较深些.
说句实话现在的diy1541dac绝对有力战Studer A727,这是最大的惊喜.[em11]
若各位有玩本胆1541dac的兄弟,真的要上新版的胆LPF,改善是绝对令你觉得值用100元.
亦不要浪费了钳子及众兄弟的努力,要做出频响咁好的LPF是十分不容易的.....[em07]
现心里有点念头想对这份diy1541下功夫,主要是胆输出部分原设计好像未能玩尽6DJ8.....
好友知我的diy1541开声了,带了几只唱死机的cd片考考它....他听后亦觉这1541dac声音不错,过关!! [em06]
以下是引用B在2005-10-21 22:31:00的发言:
順带一問<I></I> ,見你已用過多款OUTPUT<I></I> CAP,那一款比較好<I></I> ?
同時單片1541和兩片1541聲音上有什麼改善
[em05][em05][em05][em05][em05]
output cap我试了差不多十种(自己手上有的),[em11]
最好声是这支HOVLAND - MUSICAP,不过太大支都唔知怎放.全频表现一流,高频有种独特的晶萤通透感![em04][em04]
[IMG]<img src="attachments/dvbbs/2005-10/20051021232724836.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-10/20051021232724836.gif\');}" onmousewheel="return imgzoom(this);" alt="" />
这只Auri cap亦几好,高端延伸比MUSICAP更尽,但少了点弹跳力.
至于我地常用的TRW肠仔就总觉不够低频,中频抢了出来,虽然有种吸引的敲击乐韵味,如要用它要加大至1.5uf以上.
平价的solen亦唔差,并粒0.1uf(如MIT)改善高频应几好.红WIMA MKP10,绿色ERO,RIFA(套件的)都较平淡.....其实我想试试jensen.....
以上都是在我的器材中表现,不一定在你处靓声!![em11]
两粒1541并联在高频质感上好左,因I/V电阻要减半,噪声更低,用示波器睇方波更靓,但要用多14粒电容都是一问题,我的板板在这方面做了妥协!![em02][em02]
上张图大家看!
<img src="attachments/dvbbs/2005-10/20051023182229936.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-10/20051023182229936.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
这就是新版胆LPF的实际频响曲线,由20Hz至100KHz,由专业audio tester测出来!
[em06][em05][em06]
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