Marantz CD63 & CD67 mods list

[SimontY]

Supreme 3.3uF in my power amps are one of the best things I've ever done, the music positively FLOWS from my speakers now. It's only a matter of time before some go in my CDP.

Simon

 

[RCruz]

Thank you All

There I go again.....

Just a question.... is there any limit on the output cap capacitance value ?

I know that the bigger the cap, the easier it is to transmit the bass... but there must be some shortcoming or you all would be using 100uF or more....

 

[Fidelity Audio]

The reason we don't use 100uF is because of the cost and they would have to be housed in their own room due to massive size. The Marantz has 110uF as standard on its output (2x 220uF).

A 10uF Mundorf Supreme is approx 35 * 105

Brent

 

[RCruz]

The reason we don't use 100uF is because of the cost and they would have to be housed in their own room due to massive size. The Marantz has 110uF as standard on its output (2x 220uF).

A 10uF Mundorf Supreme is approx 35 * 105

Thank you Brent

So the only shortcoming is size (besides cost).

I will experiment a little and report the "damages".

Ricardo

 

[RCruz]

Supreme 3.3uF in my power amps are one of the best things I've ever done, the music positively FLOWS from my speakers now. It's only a matter of time before some go in my CDP.

Hi Simon

Where, in the power amp, did you place these films ?

 

[Fidelity Audio]

Lol

Simon placed the Mundorfs in the one and only place available. I think he posted a picture a few pages ago

Brent

 

[SimontY]

Yep:

http://www.diyaudio.com/forums/showthread.php?postid=1648598#post1648598

At the back, I had to remove some remote power control sockets.

Simon

 

[RCruz]

Yep:

http://www.diyaudio.com/forums/showthread.php?postid=1648598#post1648598

At the back, I had to remove some remote power control sockets.

Hi Simon

When I wrote where, I meant where in the schematics...

 

[Fidelity Audio]

Same place as in the amp hehe

Sorry

It's his signal input cap

Brent

 

[SimontY]

Well to be precise, Ricardo, here it is:

Simon

 

[RCruz]

Well to be precise, Ricardo, here it is:

I always like to know the tech details.... Thank you Simon

 

[Fidelity Audio]

And it never even blew up!!

Brent

 

[RCruz]

And it never even blew up!!

Remember "Burning Amp".... there is always that possibility.

I am now starting to my meridian. (I am following some precious input from Simon and Lee)

I hope nothing bad happens

Ricardo

 

[SimontY]

Gosh, it looks quite old school that

 

[Fidelity Audio]

It looks like it could sound quite nice.

Brent

 

[SimontY]

But it has op-amps and a long signal path.

 

[Fidelity Audio]

Hence the word 'could'. Lots to do.

Brent

 

[RCruz]

But it has op-amps and a long signal path.

Hence the word 'could'. Lots to do.

Hum...

Can I replace the NE 5532 by some LM4562 ?

 

[SimontY]

Hum...

Can I replace the NE 5532 by some LM4562 ?

Of course, that would make it sound loads cleaner, natural and detailed.

But a simple discrete buffer sounds loads better than even LM4562.

Simon

 

[Fidelity Audio]

Yes swap out the opamps then once you're happy with it slap in a DOS or DIS in this case

Brent