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-   -   Marantz CD-6000 OSE VS Kenwood DP-7090 -which is better? (http://www.diyaudio.com/forums/digital-source/47434-marantz-cd-6000-ose-vs-kenwood-dp-7090-better.html)

LifeIsMusic 10th December 2004 01:19 PM

Marantz CD-6000 OSE VS Kenwood DP-7090 -which is better?
 
Hello.
I am looking for a CD-player and dealer offers me two choices: Marantz CD-6000 OSE and Kenwood DP-7090, both are good, but... Could you help me - which one is better sounding or has a bigger potential for modding???

Thank you!

Ray

gainmona 13th December 2004 10:49 PM

The cd-6000 sound very good, but is not the top for modding, is modded by origin and not accept other modification, IMHO.

Fabian 15th December 2004 08:30 PM

Hi Ray,

Kennwood is an excellent player for modding. It has SM5843 and 8 x PCM1702 inside! Add a low jitter clock, experiment with SM5843 filter roll off and dither settings, build a decent I/V stage (e.g. D1) and the Kenwood will be a real killer.
And if your brave enough you can even try a non oversampling modification. :D

Regards,
Fabian

LifeIsMusic 16th December 2004 05:58 PM

Thank you all.

More ideas?

aparatusonitus 16th December 2004 09:56 PM

Kenwood CDP7090 nonos
 
Quote:

Originally posted by Fabian
And if your brave enough you can even try a non oversampling modification. :D

Do you know exactly how to do nonos mod?

Fabian 17th December 2004 06:37 AM

Re: Kenwood CDP7090 nonos
 
Quote:

Originally posted by aparatusonitus


Do you know exactly how to do nonos mod?

Yes I know ;)

Have a look at my homepage: http://www.geocities.com/nonospcm1704. With the "universal shifting circuit" it's possible to interface any decoder with any DAC.

My brother just bought a DP 7090 on ebay and he will do some modifications (Clock, nonos, D1 output, different DAC setups: parallel, single, balanced). He (or me) will keep you updated... :)

Regards,
Fabian

aparatusonitus 17th December 2004 10:14 AM

Excelent work Fabian, thanks a lot.

LifeIsMusic 21st December 2004 08:01 PM

Interesting ideas... Now I am owner of DP-7090 and thinking about modifications... Which clock mod to use? Are there any testing equipment needed for clock modding (adjusting)? I found a modification made by one Russian audio magazine (http://www.elcp.ru/titles/ret/2002_0...2002_07_05.zip), can anyone comment that one? It is in russian:)

Ray

LifeIsMusic 18th January 2005 10:02 PM

Hello again.

I am not a proffessional at this point, please explain me more closley how to experiment with SM5843 filter roll off and dither settings and build a decent I/V stage (e.g. D1). What to do with D1 output?
I am considering to change opamps from NJM4580L to AD811AN - is it a good choice? Seems to be quite expensive mod.
And Fabian, have you got any news with DP-7090?
Why is nonos better?

masi 19th January 2005 05:10 PM

Hi Ray

May I introduce myself, I'm Fabian's brother :cheerful:
I've grabbed a DP-7090 on ebay last December - but Iím still waiting for it to arrive.

For experimentation with filter settings and dither processing have a look at the SM5843 datasheet (google).
Setting pin 27 high (5V) results in a sharp roll off, setting it low (gnd) in slow roll off. The same principle applies for dithering: itís turned on when pin 21 is low and turned off when high.
To switch easily back and forth between the different modes isolate these two pins from the pcb (if thatís not already the case) and connect them to ground via a switch. IMHO slow roll off generally sounds better. Iím not sure for dither.

As for the output stage, changing from the original opamps to AD811 is not really cheap but relativly easy to do and should be a clear improvement.
Many people prefer discrete output stages (like Pass D1, thereís some info on this forum) to the standard opamp solution, so Iíll check that out one day (if I ever get my Kenwood).

Nonos is maybe not better, just different. Some like it, some not. Personally I thinks it sounds just right and thatís what it is all about. But I'm aswell wondering how the SM5843 perfoms since itís considered to be a good sounding digital filter.

Iíll be more specific on my mods after a deep look into the player. Iíll keep you updated.

Regards,
Mario :)


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