Marantz CD6007 Review (CD Player)

[NTTY]

Hi Flo,

I would be very interested in a test from you of the Sony DVP-SR760H to see if its a good, bit-perfect and very affordable CD-transport!

Let me think about how to make it interesting. But as a transport it honestly appeared flawless, except the slowness.

A heartful Thank you very much! for the very interesting and thorough reviews you are doing, for all the time you are spending, very much appreciated!!

Thank you!

PS the last new CD player I bought is a TASCAM CD-200, hoping (after some research) it has a robust drive and will work fine as a sufficient transport. Any thoughts on this?

Best regards from Germany,
Kai

No, I unfortunately don’t know this one.

Cheers

 

[Vlad Soare]

I've just remembered that there's an option in the menu to turn off the digital output ports if they're not used, presumably to keep them from picking up (or perhaps generating?) interference. I wonder if this may have something to do with the anomalies you're noticing at very high frequencies (unless you did actually turn them off, in which case never mind).

 

[NTTY]

I've just remembered that there's an option in the menu to turn off the digital output ports if they're not used, presumably to keep them from picking up (or perhaps generating?) interference. I wonder if this may have something to do with the anomalies you're noticing at very high frequencies (unless you did actually turn them off, in which case never mind).

I tested indeed, and no differences. This is an effect of the oversampling filter only.

 

[Iani]

I have some new info that I found on the Marantz website; in the 'Features' section there's written that the CD 6007 has this 'Marantz Musical Mastering'. It seems like an upsampling to DSD 11.2 Mhz, but there's no clear info. Others Marantz players, the more expensive ones, have a proprietary DAC, so they say at least. What do You think?

 

[Scytales]

I have some new info that I found on the Marantz website; in the 'Features' section there's written that the CD 6007 has this 'Marantz Musical Mastering'. It seems like an upsampling to DSD 11.2 Mhz, but there's no clear info. [...] What do You think?

The Marantz CD6007 uses an AKM AK4490 DAC chip that oversamples incoming PCM data to 256 FS. That's 11.2896 MHz with FS=44.1 kHz (CD data rate) or 12.288 MHz with FS=48 kHz. Of course, with incoming FS=88.2 kHz or 96 kHz (double the base rate), oversampling is only half 256 times, ie 128 times, to get the finale conversion rate of 256 FS. And so on with PCM at rate higher than 88.2 or 96 kHz. That's the usual way to convert PCM in analog in this day and age and has been for decades. Some D/A converters operate at lower rates than 256 FS, some at higher rates.

Most probably same thing with DSD data, except DSD is already closer to the final rate of the conversion stage and thus, the oversampling ratio is only 4 times with DSD64 input, 2 times with DSD128 input and no oversampling with DSD256 input.

Marantz's words, that I have not read, are probably fancy words devised by the marketing department to described this processes in non-technical commercial add.

 

[NTTY]

I have some new info that I found on the Marantz website; in the 'Features' section there's written that the CD 6007 has this 'Marantz Musical Mastering'. It seems like an upsampling to DSD 11.2 Mhz, but there's no clear info. Others Marantz players, the more expensive ones, have a proprietary DAC, so they say at least. What do You think?

You have beginning of answers here Marantz SACD 30n and here Marantz SA-10.

You can see the same type of filter response and the same negative effects on attenuation at 20kHz and noise generated out of audio band (with 44.1kHz sources). This is due to the upsampling to DSD, and is obviously common to these players as you spotted.