Marantz CD5400 clock replacement - Page 7

Guido Tent · 2nd March 2006, 08:52 PM

Quote:

Originally posted by 4real
ah well, It works, so I guess it will be OK. The DAC will probably reclock everything to his own clock and will not care about how the data is delivered (within limits of course).

Essentially this is true when data is considered, but lower jitter in the SPDIF stream means lower jitter in the recovered clock inside the DAC. Remember any PLL is an attenuator, less garbage in - less garbage out.

I haven't found any DAC yet that is fully insensitive to its' SPDIF input.

best

4real · 3rd March 2006, 08:02 AM

Who sais it's going to get SPDIF input?

It's directly connected from servo processor to DAC.

4real · 5th March 2006, 09:56 AM

Just to clarify how it works for the CD5400:

http://deepspace9.xs4all.nl/download/cd5400dac.png

4real · 8th March 2006, 10:53 PM

Well, here's my clock:

It has both an inverted and non inverted output. I'm going to check it first on my work tomorrow before I put it in. I know me

I also already changed the opams to AD8620, replaced the KA regulators for MC types. Those are four times less noisy. Replace the big caps with 4700 uF Panasonic FC's, and the smaller ones, after the regulators and by the opamps, and DAC with 220 uF 25 V rubbicon ZL. I also replace the rectifier diodes with schottky's. I also bypassed the elco's at the opamps with a 100nF ceramic cap, and also the diodes.

I notice a slightly better bass performance, and it appears to have more detail and seems quieter. But it's to ba that I don't have any reference (unmodded version) to compare with. I bet part of it is just my mind playing tricks with me

4real · 9th March 2006, 05:48 PM

Well, the clock seems to work:

The invertor output looks about the same (though inverted), so I guess the swings have more to do with the scope wirering..

I'm going to put it in later this evening.

4real · 9th March 2006, 07:39 PM

I'v got it hooked up now! And it works

EC8010 · 9th March 2006, 09:05 PM

Great! Now, what do you think about the sound? (By the way, the ringing on the square wave is probably for the same reason that mine rang, 'scope ground lead inductance.)

4real · 9th March 2006, 09:11 PM

Well, it's hard to say what the sound is like. It was good before, and is good now. But with my headphones I think I notice that everything comes more loose from the headphones. It's as if the sound is not comming directly from the speakers. Sounds more natual. The rest is basicly the same I guess. It's to bad that I don't have any unmodded player to check the difference though. I'm alway's highly suspicious with these kinds of tweaks

Guido Tent · 9th March 2006, 09:16 PM

Quote:

Originally posted by 4real
Well, it's hard to say what the sound is like. It was good before, and is good now. But with my headphones I think I notice that everything comes more loose from the headphones. It's as if the sound is not comming directly from the speakers. Sounds more natual. The rest is basicly the same I guess. It's to bad that I don't have any unmodded player to check the difference though. I'm alway's highly suspicious with these kinds of tweaks

Hi

Good to see all works like intended. Bear in mind that digital gear needs some days to run in again. Did you check the mains chord polarisation as well ?

best

4real · 9th March 2006, 09:19 PM

Quote:

Originally posted by Guido Tent
Did you check the mains chord polarisation as well ?

9th March 2006, 09:05 PM	#67
EC8010 diyAudio Moderator Join Date: Jan 2003 Location: Near London. UK	Great! Now, what do you think about the sound? (By the way, the ringing on the square wave is probably for the same reason that mine rang, 'scope ground lead inductance.) __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

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3rd March 2006, 08:02 AM	#62
4real diyAudio Member Join Date: May 2004 Location: Arnhem	Who sais it's going to get SPDIF input? It's directly connected from servo processor to DAC.

5th March 2006, 09:56 AM	#63
4real diyAudio Member Join Date: May 2004 Location: Arnhem	Just to clarify how it works for the CD5400: http://deepspace9.xs4all.nl/download/cd5400dac.png

8th March 2006, 10:53 PM	#64
4real diyAudio Member Join Date: May 2004 Location: Arnhem	Well, here's my clock: It has both an inverted and non inverted output. I'm going to check it first on my work tomorrow before I put it in. I know me I also already changed the opams to AD8620, replaced the KA regulators for MC types. Those are four times less noisy. Replace the big caps with 4700 uF Panasonic FC's, and the smaller ones, after the regulators and by the opamps, and DAC with 220 uF 25 V rubbicon ZL. I also replace the rectifier diodes with schottky's. I also bypassed the elco's at the opamps with a 100nF ceramic cap, and also the diodes. I notice a slightly better bass performance, and it appears to have more detail and seems quieter. But it's to ba that I don't have any reference (unmodded version) to compare with. I bet part of it is just my mind playing tricks with me

9th March 2006, 05:48 PM	#65
4real diyAudio Member Join Date: May 2004 Location: Arnhem	Well, the clock seems to work: The invertor output looks about the same (though inverted), so I guess the swings have more to do with the scope wirering.. I'm going to put it in later this evening.

9th March 2006, 07:39 PM	#66
4real diyAudio Member Join Date: May 2004 Location: Arnhem	I'v got it hooked up now! And it works

9th March 2006, 09:11 PM	#68
4real diyAudio Member Join Date: May 2004 Location: Arnhem	Well, it's hard to say what the sound is like. It was good before, and is good now. But with my headphones I think I notice that everything comes more loose from the headphones. It's as if the sound is not comming directly from the speakers. Sounds more natual. The rest is basicly the same I guess. It's to bad that I don't have any unmodded player to check the difference though. I'm alway's highly suspicious with these kinds of tweaks

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