dac gain 問题
我部dac 是audio-gd 的cheap 野，nas-dac-av amp-speaker但如果我dac用high gain，speaker會喇喇聲，又拆晒咁。low gain正常
後來又試dac-headphone out用high gain都無事
Ching知咩事嗎？？
Thx 輸出太大做成失真，如果有駁前級low gain 可以了，直出後級用high gain karsonkwan 發表於 2014-5-31 05:14 static/image/common/back.gif
輸出太大做成失真，如果有駁前級low gain 可以了，直出後級用high gain
姐係我個case就low gain得了， 但點解係av amp 較大聲又無事。。headphone 又無事既？ howardyiu 發表於 2014-5-31 10:11 static/image/common/back.gif
姐係我個case就low gain得了， 但點解係av amp 較大聲又無事。。headphone 又無事既？ ...
好多時dac的gain只影響line out不影響headphone out, 你要check check自己部dac的規格。
gain同volume是兩件事情。 nicknick 發表於 2014-5-31 12:02 static/image/common/back.gif
好多時dac的gain只影響line out不影響headphone out, 你要check check自己部dac的規格。
gain同volume是 ...
唔好意思小弟真係新手，見距high gain 剩係話=+1x db
我真係當左volume 咋，因為我去high gain 剩係知speaker 同headphone都大聲左
咁我個情況係正常定有問題（high gain剩係speaker 有事） howardyiu 發表於 2014-5-31 12:09 static/image/common/back.gif
咁我個情況係正常定有問題（high gain剩係speaker 有事） ...
假設你的DAC設計調輸出的gain只影響line out，咁剩係再去amp時gain太大因此speaker輸出拆聲, 都算正常。
low gain個signal無放大到，所以去AV Amp再放大都唔會折聲，但係headphone就好細聲
high gain就放大咗個signal 12dB，去AV Amp就算個vol開得幾細都會折，但係headphone就啱啱好 chezmike 發表於 2014-5-31 14:51 static/image/common/back.gif
low gain個signal無放大到，所以去AV Amp再放大都唔會折聲，但係headphone就好細聲
high gain就放大咗個sig ...
所以照ching 咁講我個case都叫正常wo.gain咁睇真係唔係volume 咁簡單
係咪某程度係將啲digital signal放大，唔係電流(volume)..純綷学野 The headphone outputis configured to have a very slight boost applied to the low bass. This “bump” is common with many headphone amplifiers and headphone outputs, and is intended to compensate for the slight loss in very low bass encountered with many headphones. ANWKLO 發表於 2014-5-31 19:09 static/image/common/back.gif
The headphone outputis configured to have a very slight boost applied to the low bass. This “bump ...
So what Ching means is about the headphone output is specifically configured to have low influence by the switch gain than the rca output to amp and therefore the high gain cause no negative effect to the headphone due to the relatively low gain granted by the gain switch?
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