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Hello!
I am thinking about builing up a CD-player that consists actually of two DACs. Buffalo IIISE for everything except the subwoofers, so full range LS, the origin CD-player's output for the subwoofer, as this CD-player has a really mind-blowing deep frequency reproduction. But therefore I need to know how much time passes as the Buffalo DAC works in asynchronous mode. So the CD-player has SPDIF out which I would directly feed into Buffalo DAC. Can anybody understand me? Thank you,
Florian
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Just use the DAC for full range. The DAC operates to DC. So you won't be missing any bass.
As for timing etc, I would need to refer you to the ES9018 datasheet as it is a complex subject.
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Okay thanks. Well - I honestly dont know - but there is a real difference between this tuned Onkyo DX7711 (SM5864AP) and Buffalo DAC with either IVY or Legato output stage....
Florian
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Perhaps the Onkyo boosts/eqs the bass?
I'd be more concerned with the speaker which ends up moving the air, the amplifier driving said transducer and the room effect. I can't imagine that a Buffalo/IVY would not convey the full range of frequencies with great accuracy.
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Rank: Member
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I study audio engineering and I have heard a lot of good, very good, and excellent DA-converters, Hifi and professional equipment. And most, if not all of them, sound as the Buffalo DAC in the bass. But this tuned Onkyo DX7711 (0,001% matched resistors for differential amplifier, LME 49720, better clock, better supplies) sounds like going an octave deeper. Perhaps due to the layout of the differential amplifier? I dont understand this. But there is not an active boost of the low frequencies, just a low pass filter after all. Although you truely hear the higher THD+N of the Onkyo you definitely wont miss the bass. This fundament lets everything sound more natural. I really want to feed my subwoofers with this output. I will just try if it works concerning the timing.
No I am not worried about my amps or loudspeakers moving air. Why shall I? There is plenty of headroom, my room is 16m² and not a hall driving everything at the limit. The pressure chamber effect you have got with both DACs, I can compare them easily next to each other just by changing the input source of my amp.
Everybody is warmly welcome to hear this difference... it's remarkable that even my granny will hear the difference.
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Bass is really the easiest of the audio range to reproduce in a flat linear way as long as you run DC coupled. Certainly the Legato (DC coupled) and the IVY-III measure completely linear in that region (up to the point where the low pass comes into play - well above 2fs) . So if what you are hearing is different for your other D/A then the difference is likely elsewhere. :) Measure for yourself and you will see I am shooting straight with you. This really has nothing to do with the circuits. In fact I would confidently say that accurate linear reproduction has been the hallmark of those two stages throughout there existence. Just read the many reviews. I certainly can't think of anything to change to make it more accurate - and I worked long and hard on it :) In any case, I have given you the best advice I can, do with it as you will. I don't care to get into a discussion on another person's work. I can only comment on mine, and it is linear. If you search around you will see where ESS measured my work - so I am not just saying so myself. Also many users have done the same. I respect your opinion and tastes, but it does not align with my experience or that of hosts of others. Cheers! Russ Edited by user Tuesday, September 10, 2013 9:17:22 PM(UTC)
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Rank: Member
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Joined: 7/8/2013(UTC) Posts: 43 Location: Bad Ischl
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Hi Russ,
I am deeply sorry, when I read your message I felt I made you kind of angry, upset or so (sorry, English is not my first language). That was really not my intention! I truely didn't want to attack Buffalo DAC or any output stages, sorry it sounded like that. I truely appreciate this DAC! My point was just, that I was wondering why the hell this CD-player can sound so differently. And sadly I dont understand enough to explain myself, that's why I was writing/ asking you.
I am happy to read that the DAC runs from DC, and yes, I know that there are no caps in the signal path, that it is DC-coupled. On the other side my ears say different, at least my cognition is different with this CD-player. Perhaps it's psychoacoustics. Perhaps my CD-player creates a K3, 4, ... shortly above (K1) - and therefore one's brain thinks.... whatever. Definitely is, that my CD-player is not that accurate in the bass. Perhaps the control is clearly worse and therefor it sounds like more? bass.
Sorry. I dont want to spam this forum anymore with my CD-player. I was just wondering how much time passes by that ESS chip, if I could try what my idea was.
Sorry Russ, thanks for your detailed explanations!
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No problem. I am not really angry - I am only saying if you are looking for linear accurate reproduction you have it. :) Further I am just making it clear that I don't really like comparisons where I don't have first hand experience. :)
You haven't offended me in any way.
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