« Reply #36 on: March 15, 2015, 02:58:04 PM »
Red and green capacitors are soldered in. Nothing was desoldered there. They (both red and green) are Wima MKP-2 .01uf/250v 5% poly caps that give better top end detail around 20khz. The second pic just shows the LME op amps soldered in place (2 are visible, one is under copper shield. Those replaced the NJM4580s. The flip side of PCB also had the NE5532s replaced (no pic of that one though), forgot to take one and am not taking apart again now that everything is put back together.
Hopefully this helps if anyone else attempts it.
As far as specifics, the copper shield is placed loosely in there. Extra tape was applied to keep in place to avoid shorting out anything. Unit is somewhat difficult to get everything disassembled. Very tight components make for difficult soldering workspace. Complete mod uses 5 op amps and 8 poly caps. It reworks both input and output stages. I think that's it.
Since the Jim Williams commentary only inspired this mod (sounds like you swapped a different set of op-amps) - shouldn't this be dubbed the "Cheese-mod"
I had extensive communication with Jim Williams through this process. He initially modded his unit and only did the 3 chips and capacitors. All I did was make him aware of the additional two NE5532 chips on the flip side of the PCB. Once he was aware of those he modded them as well on his deck. Only after he did the complete mod, and let me know it further improved the sound, did I get the detailed instruction from him so I could mod my unit. Definitely a JWmod...not a cheese mod. I wish I could take credit for it but I am a newb when it come to electronics.
I did record some of my church worship band this morning and to my ears there is definitely a clarity and detail to the recordings that's seems more pronounced to these ears. It wasn't the best representation though since I was not in the best location and the system lacks a lot of low end. Next time out with the deck will likely be this weekend where I can get a proper recording made.
« Last Edit: March 15, 2015, 03:16:03 PM by Cheesecadet »
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