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[#1] XLR out vs RCA out    
新手,我部streamer (NT505)是用rca out 去 stereo amp (851A), 最近換了條Xlr 線,都有100多小時,音質各方面都有提升,但明顯比rca out 時個擴音volume 要開大5至6db。請問師兄們是否正常?我分別換個幾條rca 和Xlr 都是這樣。
Diablo3
個人訊息 會員
124.xxx.xxx.139
2020-04-23 08:46
[#2] XLR out vs RCA out    
一般XLR輸出比RCA大,如果是相反,的確幾奇怪。
12dragon
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113.xxx.xxx.248
2020-04-23 08:50
[#3] XLR out vs RCA out    
會唔會 個amp set gain for individual inputs
tonywong
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218.xxx.xxx.246
2020-04-23 09:24
[#4] XLR out vs RCA out    
冇錯呀,個amp 係有得set gain 比每個input. 但我check 過rca 同Xlr 個input 都是一樣gain。

其實個output (streamer NT505) 都有得set fixed line out gain 可選0dB 和+6dB,我都check 過rca 同Xlr out 都是用一樣gain。

我上啲外國Hifi forum 睇過唔一定Xlr 大聲過rca, 好睇部機在Xlr 和rca 個settings。都唔知係唔係!所以希望這裡33 啲本地薑可以比到些意見!
Diablo3
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124.xxx.xxx.139
2020-04-23 09:49
[#5] XLR out vs RCA out    
In your case, it is likely to be normal.

1. Usually, DAC XLR output level doubles the RCA output level, as in Lumin products and Esoteric products.

2. It is also common for an amp to double the input sensitivity for XLR from the RCA. In conjunction with 1, the doubling is cancelled out, so XLR and RCA will have roughly the same volume.

Your NT-505 does not comply to point 1. Its XLR output level is the same as RCA output for fixed output settings. However, it seems that your amp complies to point 2, so your XLR volume is lowered by half, and you will need to increase the amp volume by 6dB.

最後修改時間: 2020-04-23 10:40:15
wklie
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218.xxx.xxx.94
2020-04-23 10:36
[#6] XLR out vs RCA out    
會唔會部機設計不是真正平衡線路
ckk158
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14.xxx.xxx.132
2020-04-23 13:09
[#7] XLR out vs RCA out    
The teac nt505 has the choices of line out setting (0db or +6db). When I select line out +6db, the volume level is similar to the rca out at 0db setting.

唔知道關唔關真平衡事?nt505是否真平衡有冇師兄知道?
Diablo3
個人訊息 會員
124.xxx.xxx.139
2020-04-23 13:37
[#8] XLR out vs RCA out    
以下從teac nt505 個spec copy 出黎

《The Analog section, which is one of the keys to sound quality, includes four TEAC-HCLD buffer amp circuits that allow different drive modes, - fully-balanced drive for balanced output, and parallel drive mode for unbalanced output - to achieve enhanced acoustic expression.》

小弟是初弟,師兄佢意思是只什麼?謝謝!
Diablo3
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124.xxx.xxx.139
2020-04-23 13:43
[#9] XLR out vs RCA out    
我估平價嘢唔會有真平衡輸出。等睇開蓋圖...


"在電路製作方面,NT-505仍採取相當高級的作法,採取「雙單聲道」結構、全段平衡的Audio電路,"
https://www.audionet.com.tw/thread-10372-1-1.html

gundam00
個人訊息 會員
218.xxx.xxx.70
2020-04-23 14:04
[#10] XLR out vs RCA out    
#8 已寫咗答案岀黎
RCA時仍是用晒4份amp, 不過有點像後级行“bridge mode”,於是乎聲音大了
把平衡調大6dB 吧

平就唔會有真平衡係咪主觀咗少少,而且我呢D 窮能覺得NT505新機唔算平
talkx2
個人訊息 會員
220.xxx.xxx.132
2020-04-23 16:50
[#11] XLR out vs RCA out    
多謝各位意見,大昌confirmed nt505是真平衡,好似之前有位師兄講,balanced out 係比rca細聲,所以有option 比用家自由去選+6db 。btw, 我都係窮人,萬幾元對我講都唔算cheap 。當然r33有好多富有人!
我想信上面個師兄唔係話nt505係cheap 機,佢個link果篇野都係話nt505是真平衡。
Diablo3
個人訊息 會員
124.xxx.xxx.139
2020-04-23 18:21
[#12] XLR out vs RCA out    
真的假不了,假的真不了,有啲係假完再真,有啲真完再假,當然可以真完再假又再真,最好睇線路行自己要嘅路。
peter827
個人訊息 會員
218.xxx.xxx.88
2020-04-24 16:45
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