dac 個gain我估你想講dac headphone out個gain?
咁就要分清楚,一體機有3部份:
digital to analog -> pre amp -> headphone buffer
digital to analog 個output本身係冇得校gain, 得一檔gain,呢個亦係lineout
跟據我荒廢多年電路記憶,headphone buffer 個 voltage gain 係1(一般講校gain 係講voltage gain)
所以你實際係校緊 pre amp 個part 個voltage gain
重寫你個點題:amp 個gain點set好?
咁會問得準d,因為dac本身係唔要gain
有時會聽到部機唔同gain 會唔同聲, 發生呢個情況個時主要會見到:low gain 多d bass, high gain 少d bass, mid gain 介乎兩者之間。呢個現象gain bandwidth trade off:gain 愈大,frequency response 個有效範圍愈窄
如果部amp設計得好就唔會咁易聽得出唔同gain 會唔同聲,咁就點set都ok
gain bandwidth trade off之外,amp本身設計如果唔夠穩定,可能唔同gain之下個frequency response會變形,呢樣就要逐部amp睇
如果部amp設計得好,gain bandwidth trade off唔明顯,校咩gain就睇你隻headphone有幾難推
我習慣用volume 9點位做標準。如果扭到9點都唔夠大聲咁就校大d個gain。
講咁多野,其實總結都係得一個道理:每部機都唔同,你要自己試下