Music Fidelity
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- Joined
- Dec 9, 2024
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@NTTY
Thanks for the detailed reply.
1. If I understand you correctly, ALL CD specification (16 bit/44.1 kHz) DAC's are down 3.92dB at 20kHz intrinsically (mathematically)?
So any deviation of that from any player is done with engineering manipulation of the signal. In the case of the Denon the filter is purposely designed to start rolling off at around 4kHz, so it can "slowly" roll off to about -2dB at 20kHz. Whereas the Marantz was designed to start rolling off "later" but "faster" such that it is about -5dB at 20kHz. So the Marantz is actually purposely designed (or was poorly designed) to be down not only to -5dB, but about 1dB more (5dB-3.92dB) than what is expected naturally to happen (which makes no sense as to why they would do that- or be content with that- at least to me anyway
. Is my analysis correct or am I way off in my understanding?
2. So it looks like I didn't notice (thanks for pointing that out @AnalogSteph) that the scale of the graph for the Marantz and Denon were not the same (Denon is displayed more zoomed in).
So if presented in the same scale, is the roll-off in the Low End frequencies as seen in the Marantz similar to the small amount shown with the Denon? Is the Denon frequency response mild roll off in the low end (20Hz-60Hz) pretty representative for what you would expect from most players?
3. There was one additional thing I forgot to ask in my original post. Did you measure (or if not, could you) the Error Correction capability (Pierre Verany Digital Test CD ) of the Denon DCD 900NE?
Obviously all players should pass the CD standard of up to 0.2mm in length spiral gaps. But some go significantly beyond that (e.g. 1.5mm, or two closely space gaps at 1.0mm in length) until audible glitches become present. I think it would be helpful to include the maximum measure gaps in all of you reviews if possible.
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I suppose the fact that you got rid of the Marantz CD 6007 but kept the Denon DCD 900NE implies you preferred the Denon over it I guess. (not saying that means the Marantz is junk).
I really appreciate you taking the time to provide the reviews you are doing. We need more objective testing of audio gear. You just can't trust the marketing nonsense from manufacturers. Less audio magazines exist that measure audio products. For the ones that do still exist, people need to look out for shady subjective reviews/publishers opinions done for personal gain (and don't get me started with many YouTube audio channel reviewers for the same reason, etc). Plus, with so few Audio Retail stores available locally in anything but the largest cities/markets, it makes it difficult or impossible to personally to see, listen and touch these products to make informed purchase decisions. We are left almost totally blind. Thank you so much for your dedication and passion for doing these tests, sharing them, and answering questions. While it seems obvious you enjoy doing it, it still takes time. A tip of the cap from me
PS: Just curious if you can let forum readers know what software/equipment you use to test the equipment (my apologies if this is noted somewhere else in the forum).
Thanks for the detailed reply.
1. If I understand you correctly, ALL CD specification (16 bit/44.1 kHz) DAC's are down 3.92dB at 20kHz intrinsically (mathematically)?
So any deviation of that from any player is done with engineering manipulation of the signal. In the case of the Denon the filter is purposely designed to start rolling off at around 4kHz, so it can "slowly" roll off to about -2dB at 20kHz. Whereas the Marantz was designed to start rolling off "later" but "faster" such that it is about -5dB at 20kHz. So the Marantz is actually purposely designed (or was poorly designed) to be down not only to -5dB, but about 1dB more (5dB-3.92dB) than what is expected naturally to happen (which makes no sense as to why they would do that- or be content with that- at least to me anyway
2. So it looks like I didn't notice (thanks for pointing that out @AnalogSteph) that the scale of the graph for the Marantz and Denon were not the same (Denon is displayed more zoomed in).
So if presented in the same scale, is the roll-off in the Low End frequencies as seen in the Marantz similar to the small amount shown with the Denon? Is the Denon frequency response mild roll off in the low end (20Hz-60Hz) pretty representative for what you would expect from most players?
3. There was one additional thing I forgot to ask in my original post. Did you measure (or if not, could you) the Error Correction capability (Pierre Verany Digital Test CD ) of the Denon DCD 900NE?
Obviously all players should pass the CD standard of up to 0.2mm in length spiral gaps. But some go significantly beyond that (e.g. 1.5mm, or two closely space gaps at 1.0mm in length) until audible glitches become present. I think it would be helpful to include the maximum measure gaps in all of you reviews if possible.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I suppose the fact that you got rid of the Marantz CD 6007 but kept the Denon DCD 900NE implies you preferred the Denon over it I guess. (not saying that means the Marantz is junk).
I really appreciate you taking the time to provide the reviews you are doing. We need more objective testing of audio gear. You just can't trust the marketing nonsense from manufacturers. Less audio magazines exist that measure audio products. For the ones that do still exist, people need to look out for shady subjective reviews/publishers opinions done for personal gain (and don't get me started with many YouTube audio channel reviewers for the same reason, etc). Plus, with so few Audio Retail stores available locally in anything but the largest cities/markets, it makes it difficult or impossible to personally to see, listen and touch these products to make informed purchase decisions. We are left almost totally blind. Thank you so much for your dedication and passion for doing these tests, sharing them, and answering questions. While it seems obvious you enjoy doing it, it still takes time. A tip of the cap from me
PS: Just curious if you can let forum readers know what software/equipment you use to test the equipment (my apologies if this is noted somewhere else in the forum).