seanadams Wrote: > This is bad. For a hifi setup you should use an attentuator or preamp, > for safety reasons if nothing else. The problem is you are taking a DAC > with a decent SNR, and then only using a *TINY* fraction of its range > down close to the noise floor. I can not stress enough how detrimental > this will be to the sound quality! > > Actually, that is the expected behavior. The noise floor does not > change when you use digital attenuation. > > I just did. :) > > http://www.seanadams.com/1.gif > http://www.seanadams.com/2.gif > > 1.gif is a full-scale sine wave, and 2.gif is the noise floor when > nothing is playing (both plots are right-channel only). The peak you're > hearing is at 8865 Hz and is at -120.70 dBr. The left channel is > quieter, but still, 120dB down is very low **provided you have a > reasonable signal level**. It would be interesting to see the noise floor graphs at the various display brightness levels. Also, it would be interesting to see how the SB2 compares with the SB3. I suspect the noise floor of the SB3 is worse due to the design having the display attached directly to the underside of the mainboard.
I've heard the safety issue expressed before, but now it appears that running the analog outs directly into a power amp and using the digital volume control may be unusable. -- JJZolx Jim ------------------------------------------------------------------------ JJZolx's Profile: http://forums.slimdevices.com/member.php?userid=10 View this thread: http://forums.slimdevices.com/showthread.php?t=24445 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
