I am confused as well. Balanced input suppresses common mode noise, but S/N measurements were taken with inputs shorted. I don't see any reason why balanced should be worse, assuming similar input level.
S/N ratio Balanced input vs. Unbalanced input
Hi, is it normal that signal to noise (S/N) ratio at rated output of balanced input (XLR) is lesser than unbalanced input (RCA) ?
eg. Accuphase E280 , S/N ratio balanced is 96dB, unbalanced is 107dB.
Also E280 , at preamp stage , dB gain : balanced/unbalanced to pre output is 18dB gain, power amp stage dB gain : 28dB, total of 46dB.
What about other integrated amplifiers specs for comparison ?
S/N ratio (balanced) :
S/N ratio (unbalanced):
Preamp gain :
Poweramp gain:
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@kijanki I just check E270 vs E260 technical paper, E270 noise voltage is 35microV at -30dB volume position But in the above E280 technical paper, E270 noise voltage is 41 microV. I am more confused now. |
@kijanki the reason I ask is I can hear noise (hiss) from tweeters when my balanced input (Denafrip Ares II) is connected while music is stopped playing. Volume changing not affected the hiss sound. |
- 18 posts total