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Post by NPAudio on Oct 4, 2022 22:37:09 GMT
Hifiman R2R200 Black (PCM1704U-K) This one gained momentum when I designed a chassis extension removed (cut leg method) the 2 x OPA1642 opamps and replaced with 2 x ADA4625-2 unfortunately I couldn't get them stable and the R2R200 SMD circuit pads & tracks seem pretty weak so more than one or component changes is not worth pursuing. I decided to go back to stock OPA1642 only to find them out of stock world wide with report lead times of 1 year!!! I did buy some I was assured where genuine at 5 x the price but the markings underneath were not like any Ti opamp I had seen. I didn't even try them. I wired in some soic 8 clasps and tried a few opamps but nothing of interest. Fortunately Digikey got some OPA1642 SOIC8 in the other day after many weeks (other suppliers still out) these are marked underneath like stock and other Ti opamps and so the mod progressed back a little and then forward with Amtrans AMCH Copper film caps and AMRG resistors. Sounding good but more to come, currently waiting on batteries from China before I know what room I have left to play with.
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Post by gazzington on Oct 9, 2022 18:23:55 GMT
After seeing this, I wish I hadn’t sold my red r2r2000!
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Post by whitigir on Oct 9, 2022 20:51:04 GMT
After seeing this, I wish I hadn’t sold my red r2r2000! Never too late to get back in the game !!! Lol!! Used DAP is everywhere BTW are those ADA8032 upgraded ? Or are they stock
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Post by NPAudio on Oct 9, 2022 23:30:38 GMT
After seeing this, I wish I hadn’t sold my red r2r2000! Never too late to get back in the game !!! Lol!! Used DAP is everywhere BTW are those ADA8032 upgraded ? Or are they stock Those are stock, couldn't find anything that I thought would be both compatible and an improvement.
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Post by gazzington on Oct 10, 2022 9:21:41 GMT
The r2r2000 sounded great. Its only downparts for me was the non existant battery life. I even coped with the primative ui!
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Post by NPAudio on Oct 12, 2022 14:22:31 GMT
Some more work done whilst waiting for batteries.
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Post by whitigir on Oct 12, 2022 14:30:56 GMT
Beautiful! I love them PML and Vishay
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R2R2000
Oct 13, 2022 0:22:19 GMT
via mobile
Post by justsomesonyfan on Oct 13, 2022 0:22:19 GMT
Gorgeous mod, cannot wait to get it when time comes. What will this mod be called? I suggest n2p2000 black (or red, depending on og module)
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Post by NPAudio on Oct 20, 2022 22:01:09 GMT
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Post by whitigir on Oct 21, 2022 0:21:18 GMT
Beautiful man !! Especially loving how you worked on the decoupling capacitors there
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Post by NPAudio on Oct 27, 2022 15:27:11 GMT
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Post by whitigir on Oct 28, 2022 16:41:23 GMT
Amazing work!!! Someone will be in love for a long long time
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Post by gazzington on Oct 28, 2022 21:37:44 GMT
This is an awesome mod. Wish I could hear it 😀
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soybi
New Member
Posts: 6
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Post by soybi on Nov 3, 2022 14:01:44 GMT
Wow! awesome work!
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Post by justsomesonyfan on Nov 25, 2022 16:22:35 GMT
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