Marantz CD63 & CD67 mods list

[Malefoda]

Yep I guess that PCB is not the same. It's easy and quick to change it.
About laser unit, soundwise, VAM12 vs CDM12 and even old but working CDM12 vs brand new VAM12?

[Fidelity Audio]

You don't need any dc blocking caps in the 63/67. The only noise you will hear is on power on/off where the +/- psu discharges. This is where you build a simple muting circuit to stops this happening.

Other than using caps like Mundorf Supreme or better you will always add colour or grain to your sound.

Brent

[tms2000]

Do you need to change the value of R655,R656,R660 & R661 when replacing the dc blocking caps.I like to try blackgate N 47uf, please tell me the value of the resistors above.THANKS

[6h5c]

No, you don't have to change them. They just provide a (dis)charge path for the output caps, in case you power-up the player without an amp connected.

Ray

[tms2000]

Originally Posted by 6h5c

No, you don't have to change them. They just provide a (dis)charge path for the output caps, in case you power-up the player without an amp connected.

Ray

THANK YOU! I ask because it seem to sound thin (bass is lacking)

[6h5c]

Oh, that could be the Black Gates. They need about a zillion hours to burn in...

Don't worry, the bass will probably come back in one or two weeks, depending on how many hours you play music every day.

Ray

[tms2000]

Originally Posted by 6h5c

Oh, that could be the Black Gates. They need about a zillion hours to burn in...

Don't worry, the bass will probably come back in one or two weeks, depending on how many hours you play music every day.

Ray

So it's not because I lower the value (from 110 to 47uf)THANKS again

[SimontY]

No, certainly not, at least not from a clear technical standpoint. You'd probably not get bass roll-off unless you reduced it by a factor of 10! Most people use about 4.7uF and have decent bass.

[Fidelity Audio]

I have yet to find 4.7uF cause a problem on the Marantz output. 2.2uF causes bass roll off on some systems.

Brent

[barry.childs]

I used 4.7uf and the bass is good. Iv'e been told by many people not to go lower though. I removed the muting transistors in one cd63ki but could hear no improvement so I put them back.