|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
206.255.205.50
In Reply to: RE: What a big disappointment; NAD M51 with OPPO 105d (long) posted by John Elison on October 16, 2016 at 23:12:06
The DA-3000 has BurrBrown PCM1795 DACs and it sounds better to me than the 105D.
I suspect what you are really hearing is differences in the unit's analog output stage. The Tascam uses NE5532 op amps vs. the Oppo's LM4562s.
Ironically, the former is a 1979 design while the latter is from 2006. :)
Follow Ups:
People in 'digital' forums tend to place too much weight on the DAC chip itself for it's contribution to the overall sound of a DAC. There are several outstanding modern DAC chips to choose from yet the same chip implemented by different designers can result in vastly different sounding DACs. Some outstanding, some crap. As you mentioned, the analog output stage has a huge influence on the overall sound, arguably more so than the DAC chip itself.
And one inmate's suggestion of simply removing coupling caps to improve sound is a dangerous one. This is the same guy who blew up his Tektronix oscilloscope by probing around where he didn't belong. If it were that stupid simple the designer would have removed the coupling caps and their associated cost to begin with. Coupling caps are there for a reason.
You are expert in fabrication. Troll.
Now Abe, you know very well that's not what he meant.
I'm afraid all this talk of R2R vs. DSD dac chips and methodology has gotten me to the edge of pulling the trigger on the Yggdrasil. What tipped me today was finding this review by Craig Uthus of Eddie Current, formally of Moth Audio.
--------------------------------------------------------------------
Big speakers and little amps blew my mind!
to attribute SQ exclusively to opamps. It depends on how they are powered, bypassed and coupled, as well as how many in the audio chain.
The Oppo has coupling capacitors and this was a reason why I wouldn't buy one.
Remove the coupling caps in most ouptput stages and SQ changes very significantly for the better.
> The Oppo has coupling capacitors and this was a reason why I wouldn't buy one.
Please show me the schematic for any DAC that DOESN'T have a coupling capacitor in the output stage or simply explain how one passes AC while blocking DC without a coupling capacitor.
Come to think of it, how does a 2A3 direct coupled power amp with a direct (series) feed OPT prevent DC from getting to the speakers?
My quick and dirty answer to your question would be a DC blocking cap after the voltage amplifier, as opposed to a coupling cap between the dac chip and the V amp. Seems like a gyp though. Not like you asked me. :)
I just got a Schiit Yggy that's billed as direct coupled. Maybe I'll ask them about it when I send them an email about what I like and don't like about their dac.
Keep slinging that solder Palustris!
----------------------------------------------------------------
Big speakers and little amps blew my mind!
Sorry! That question wasn't aimed at you...
exclusively to dac chip and opamps, the same caveats apply.
...attribute SQ exclusively to opamps.
Who did that?
It depends on how they are powered, bypassed and coupled, as well as how many in the audio chain.
What the rest of us call the " analog output stage ." :)
Agree about coupling capacitors.
Still, a linear amplifying device is always a good thing.
---------------------------------------------------
Big speakers and little amps blew my mind!
Linear Stage - agree. It is also true that power supplies influence sonics a lot.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: