Marantz CD63 & CD67 mods list

[gy21]

Hello Again,

It has been a while back since I've been here, but it started itching again.

I did lot's of mods to my cd67se, but now I would like to look into a discrete output stage. After some research on the web I found a few solutions.

Can you advise me what is the best?

OPA SUN
http://www.audio-gd.com/enweb/pro/diy/OPA.htm
Burson Opamp http://www.bursonaudio.com/burson_opamp.htm
Audioupgrade Output stage http://www.audioupgrades.co.uk/discrete.shtml

[Fidelity Audio]

I have to be careful here.

The dedicated discrete is the best option but there are only 2 pairs left.

I can say the Bursons are nearly as good as a dedicated discrete.

I have not heard the SUN.

Brent

[UV101]

Originally posted by rowemeister
The dedicated discrete is the best option but there are only 2 pairs left.

I can say the Bursons are nearly as good as a dedicated discrete.

I have not heard the SUN.

I agree!

I've got both burson and a DOS running together in a different player.

The DOS is excellent in its std form. However, you can tweek it to increase its performance further.

If it were me, I'd go for the audioupgrades DOS. I'd also get Blackgates on it, Mundorf Supreme's on the output and drive it with SPowers.

You can always start with the std dos then add the hop ups later if you feel the need.

Ian

[gy21]

I do like the fact that the Burson's can be easily re used in a different system.

[poynton]

Originally posted by rowemeister
................

The dedicated discrete is the best option but there are only 2 pairs left.

...............

????????

Does that mean a MkII is in the offing ????

Andy

[Fidelity Audio]

Originally posted by gy21
I do like the fact that the Burson's can be easily re used in a different system.

Yes fitment wise they make life very easy indeed.

Brent

[Fidelity Audio]

Originally posted by poynton



????????

Does that mean a MkII is in the offing ????

Andy

No i'm not doing them anymore. The cost to get them built was alot and they have sold very slowly so I've decided not to bother and concentrate on a newer clock.

Brent

[UV101]

Originally posted by gy21
I do like the fact that the Burson's can be easily re used in a different system.

This is true if you are talking about "pluging in" to 8dil sockets.

I've currently got this DOS running in my philips CD960 which is a TDA1541 player. The only change required to get it working was to ground the inverting input for each channel.

TBH if you're starting to make changes in this area, you can obvioulsy use a soldering iron so i don't see why this ability to easily plug in and out is an argument.

The DOS in std form is a much better sounding circuit than the Bursons. It will replace the entire output stage of the player. Unless you make all the mods to the filter and outputstage (on Rays list pg1) and even then, you will always be at a disadvantage running the Burson's.

I'd personally recommend the DOS over the Bursons.

Ian

[padman]

Feeling

Got those stubborn caps out panas in and still works

Now want to disable headphone jack is this correct on 67?

Remove c901/902 and u139/140

Is it worth removing the HDAM componants to prevent noise?

Cheers Ian

[RCruz]

I have been studying the various opamp solutions available and have some quite pertinent questions:

I changed from NJM2114D to LM4562 with enourmous gains in sonic quality. After that I tryed the LME49720 with even greater results (it takes a while to burn in though).

I did this mods just by swapping the parts, leaving the feedback circuits untouched.

In the CD53, I see the 120pF C601/602 caps are in parallel with the feedback resistors R603/604.

Are these caps needed to optimize the opamp sound ?

Ricardo