Marantz CD63 & CD67 mods list - Page 1802 - diyAudio
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Old 26th February 2012, 03:45 PM   #18011
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That's a nice amp you've got bubble-wrapped down the bottom right there :-)
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Old 26th February 2012, 05:00 PM   #18012
Puffin is offline Puffin  United Kingdom
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Swapped out the op-amps today and put some sockets in. Had some AudioGD (Earth) discrete op-amps lying around that have seen various duties in CDs and Dacs. Seem to make quite a difference. How good are the JRC op-amps?
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Old 26th February 2012, 05:55 PM   #18013
SimontY is offline SimontY  United Kingdom
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Pretty poor!!
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Old 26th February 2012, 06:22 PM   #18014
Puffin is offline Puffin  United Kingdom
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Ah....ok...in the bin then! The only other mod I have considered is the additional regulator as per acoustica (see link)

http://www.acoustica.org.uk/t/63/63hacks.html


Has anybody else done this and if so is it worth it?

The schematic shows the +5v out, but not the trace for the +voltage in or grd. Is it just a matter of reading the schematic and figuring it out for yourself?
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Old 26th February 2012, 09:28 PM   #18015
SimontY is offline SimontY  United Kingdom
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I'm not sure what extra reg that is, but you can add over 20 potentially. The more the merrier!
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Old 26th February 2012, 11:39 PM   #18016
UV101 is offline UV101  England
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Dac analogue is the best place to start with a new reg! ;-)
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Old 27th February 2012, 02:51 AM   #18017
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I haven't been on here in a long time what's some of the best sounding op amps that some of you have found to sound good in the 67SE? I think I'm running LT1364 OP AMPS in mine at this time. I've done quite a few of the other mods to it already. Thanks for all info!
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Old 27th February 2012, 05:12 AM   #18018
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Mine's a 63, but I'm personally very happy with LM4562HA on BrownDogs. I tried swapping one channel out for an original JRA recently and the HA was clearly a step above. That's with HDAM bypassed and lots of filter & PSU mods.

I'm still loving the sound of my awesome flea-ridden, screen-dead player, btw. There seems to be a worldwide drought on suitable display transformers, so I think it's going to be like this for a while.

Cheers,

Ben
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Old 27th February 2012, 11:49 AM   #18019
UV101 is offline UV101  England
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The LME49720HA is also the same. You can fit them into std sockets without any issue.

The std 8 pin dil version LME49720NA is also very good and is pretty cheap. I'd give these a try if the HA versions are a bit too pricey for you. Another thing that will have a significant effect on the sound are the PSU rail caps in the middle of the opamps. I tend to use Rubycon ZLG here as they sound similar to ZA's and are very cheap! Either 220uF or 470uF.

Its always a good idea to fit quality sockets so you can easily roll opamps.
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Old 27th February 2012, 11:53 AM   #18020
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Heck, I said I have LT1364s in mine but, the more I think of it I may have the OPA627s on Brown Dogs in it I'm going to have to look I guess. Thanks for the tip on the ones you're using I'll have to check into them I've been out of the game for quite some time.
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