Marantz CD63 & CD67 mods list

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RCruz

RCruz

Member
Joined 2006
Paid Member
rowemeister said:
Cd players and similar sources have a 2v p-p output and most amps have an approx input sensitivity of 150mV. This causes overload on the amps input (this is why 9 Oclock on the volume is loud). Fitting attenuation to the input of the amp stops this overload and allows a much more natural and dynamic sound (like LP), also an other benefit that comes from this is the volume will be nearer the 12 Oclock position for the same given volume so you have more fine adjustment plus the stereo image is much better as the volume pot is much better away from its start position.
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Hi Brent

I believe you are right (Again...!!)

My player sounds much higher then the phono or radio input.

I also believe that positioning the volume pot near it´s end will give better sound overall.

How can I atenuate the cd output ?

My player is now unbelievably good sounding.

I am thinking in upgrading the drivers psu....

Ricardo
 
RCruz

RCruz

Member
Joined 2006
Paid Member
Re: Re: Re: Vibration Isolation

SimontY said:


I hope you're not comparing using typical modern CDs, but rather well-mastered ones where CD actually has a fair chance to shine.

Simon
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I am using fine pressings from ECM... The sound is fantastic but can not compete with the LP ability to produce a real soundstage with minute detail....


Thomo said:

Sorry to say Simon, but I doubt whether cd will ever sound better than lp. In my experience the lack of compression on lp makes it soo dynamic and it has a life to the sound that cd just can't do. Admittedly an uber player like yours or Brents may get close, but for me a good vinyl setup is king (except when I snap the stylus by dropping it).

Lee.
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Quite right.


SimontY said:


I've never heard an expensive turntable, but whenever I hear vinyl I notice a common elastic-bass and rolled-off treble colouration. I expect this is what people enjoy on less-than-perfect recordings as it seems to sweeten things up. The effect is reinforced by the positive trait of a strong, physical bass and fine timing.

Those latter qualities CAN be reproduced on CD IMO, and what's more we can have stereo bass and bass all the way down to 20hz on CD, which is a bonus sometimes.

Simon
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I recently attended on Vinyl fair in Lisbon.
The stands had real high end turntables with very high end amps. You should ear some heavy turntables to understand the differences. The sound is much more coherent.

rowemeister said:
Excellent stuff. That cd is dvd based by the looks of things.

In terms of LP v CD the debate can go on forever. What I will say is a modest turntable will outperform a decent cd player.

With regards to my own cd player which you know has had the odd mod or two done, well it's up there with good turntables BUT only on my very best cds that have no or very minor compression , are dynamic and of course well recorded to start with.

Cds like 'eric clapton unplugged' and 'jazz at the porn shop' in XRCD are superb, where something like Amy Winehouse just went in the bin as it was so distorted, bet its really nice on vinyl.
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Amy CD sucks.....

Ricardo
 
RCruz

RCruz

Member
Joined 2006
Paid Member
riccardo said:



Toh!
Could we know WHY?


:D :D :D :D

Ricardo, could you describe the difference from before?
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After one year modding this player (following this forum) it presented lots of dynamics, fast transient response, lots of bass and trebble but a shallow stereo image.

Than came Mauro´s mod and finally I got stereo separation, real imagery and credible sounstage.. but the sound was very edgy.

Finally I did the accoustica.og modd and averything came into place.

My CD53 sounds unbelievably good.:D :D :D

Regards

Ricardo
 
R

riccardo

Member
Joined 2005
So, from a correct point of view:
All the tweaks you've done before on player were totally not enough to improve seriously audio quality of your player.
So we come in an agreement that 2 are the defects of 63 series.
At first, less important from the audio quality point of view, the wrong GND path of XO,
and, 2d, but very very important, is the noise created by DAC during conversion.
So i think that Mauro Penasa's idea is the most important tweak in all the story of Marantz players mods.



RCruz said:

After one year modding this player (following this forum) it presented lots of dynamics, fast transient response, lots of bass and trebble but a shallow stereo image.

Than came Mauro´s mod and finally I got stereo separation, real imagery and credible sounstage.. but the sound was very edgy.

Finally I did the accoustica.og modd and averything came into place.

My CD53 sounds unbelievably good.:D :D :D

Regards

Ricardo
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J

jimh0612

Member
Joined 2006
rowemeister said:
lol

What is the KI doing / not doing again?

Brent
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Hi Brent.

Originally sledding outwards and not stopping.

The sledding out started when I knackered a pad/track changing c513 on the decoder. Repaired it, or so I had thought, but the fault persisted, and now I'm blowing fuses.

Both go the same time, and instantaneously - you can see the orange glow as they pop when you switch on.

This machine still had the oem regs so I've removed the 12v regs with c803,c804, the 5v reg with c813,c814,c815 and also the display reg.

Not sure where to look next - can't see any obvious signs of shorts like solder splashes etc.

I've also taken out the RJH's I'd put in at c509,c512,c513,cd05 and inductors at r508,r511, even though she was working fine with these in.

When I last checked the voltages from the transformer appeared to be OK so I'm a bit stumped as to where to look next.

Your uber machine looking awesome, btw:worship:
 
Fidelity Audio

Fidelity Audio

Member
Joined 2005
fidelityaudio.co.uk
philpoole said:


Brent!
Looking at the photo I can just see that at least R909, R905 and R913 haven't been modded!
It must bother you, but at least the sleepness nights are countered by the fact that it can be improved even further ;)

It must be sounding great these days!
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LOL there are still things to do. I need to change the inductors on the discrete output for the better shielded ones + crack on with the ezdac. I'm also thinking of changing the output caps to Mundorf Supreme silver/gold but they are not cheap. I'm also very busy upgrading the rest of the system.

RCruz said:


Uberness indeed...
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;)

Brent
 
Fidelity Audio

Fidelity Audio

Member
Joined 2005
fidelityaudio.co.uk
jimh0612 said:



Hi Brent.

Originally sledding outwards and not stopping.

The sledding out started when I knackered a pad/track changing c513 on the decoder. Repaired it, or so I had thought, but the fault persisted, and now I'm blowing fuses.

Your uber machine looking awesome, btw:worship:
Click to expand...

Cheers

The two fuses supply the raw +10v -10v and the 5v reg. The fact both are blowing I would say the fault is before the 5v reg. Check D811 812 813 814 and C813 814 for any shorts. If they are ok take the fuses out and check continuity between both rails to gnd and to each other.

If all this is ok then measure the 5v output to gnd.

Brent
 
J

jimh0612

Member
Joined 2006
Hi Brent

No shorts across diodes. c813 and c814 removed, also the regs and still blowing, so can't check voltages after the fuses.

However, tx voltages check out fine.

BUT, with no power, checking the fuse contacts at j805 and j807, the tx side of the fuse holders, shows continuity across the 2 rails to each other. Is this my short?

Not sure cos your diagram showed the 9.6v widings joined at u309.

On the circuit side of the holders, at j806 and j808, no continuity between each other or ground.
 
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