I've decided to try LC Audio's AD825 opamp upgrade on my Marantz CD67SE and I'm not sure I have all the facts yet. I've determined that the 67 has the 16.9344 Mhz clock and two JRC 2114D opamps. Do the two separate opamps require two of their $39.95 modules? And, despite knowing that I need a 2114 replacement I'm still having trouble determining which one of their packages is the correct one. Type I or type III?
Regards,
Dan
Regards,
Dan
AD825
I think the AD825 is a single op amp and the 2114 is a dual chip.
I removed the 2114 from my CD67 and put machined DIP sockets in its place. I first tried OPA2134 which was much better than the 2114. Recently I got the AD826 chip and tried that. It is even better than the OPA2134.
With a socket , you can plug in any chip you want provided they are dual opamps. The AD825 modules you plan to use are also available as 8 pin DIP compatible I think.
In any case somewhere on the forum I found some people prefering the sound of the AD826 to the 825. Much cheaper also. The 826 is less than US$3/- .
Cheers.
I think the AD825 is a single op amp and the 2114 is a dual chip.
I removed the 2114 from my CD67 and put machined DIP sockets in its place. I first tried OPA2134 which was much better than the 2114. Recently I got the AD826 chip and tried that. It is even better than the OPA2134.
With a socket , you can plug in any chip you want provided they are dual opamps. The AD825 modules you plan to use are also available as 8 pin DIP compatible I think.
In any case somewhere on the forum I found some people prefering the sound of the AD826 to the 825. Much cheaper also. The 826 is less than US$3/- .
Cheers.
AD825 / AD827
Hello Dan,
you can find AD825 with a double module in France at www.selectronic.fr or have ad827 dip 8 samples from analog device. The modules from selectronic can be use directely like a dip8. I have mounted this module on a philips CD723 and a Harman Kardon HD750 and the sound is beautifull. You can find informations on my site http://ptsoundlab.free.fr , choose Lec. CD rubric.
If you speak french you can participate of the french D.I.Y. Forum, choose Forum rubric or go directely to http://ptsoundlab.free.fr/forum/index.php
all are welcome. You can speak english to if you want.
I saw that someone use opa2604 (http://home.netcarrier.com/~rstevens/cd67semods.html) but I think that ad825 or ad827 are better.
"Cordialement."
Pascal.
Hello Dan,
you can find AD825 with a double module in France at www.selectronic.fr or have ad827 dip 8 samples from analog device. The modules from selectronic can be use directely like a dip8. I have mounted this module on a philips CD723 and a Harman Kardon HD750 and the sound is beautifull. You can find informations on my site http://ptsoundlab.free.fr , choose Lec. CD rubric.
If you speak french you can participate of the french D.I.Y. Forum, choose Forum rubric or go directely to http://ptsoundlab.free.fr/forum/index.php
all are welcome. You can speak english to if you want.
I saw that someone use opa2604 (http://home.netcarrier.com/~rstevens/cd67semods.html) but I think that ad825 or ad827 are better.
"Cordialement."
Pascal.
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