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Audio-gd discrete op-amps reviewed: OPA-Earth, OPA-Moon ...
https://www.head-fi.org/threads/audio-gd-discrete-op-amps-reviewed-opa-earth-opa-moon-opa-sun-v-2.397691/
Thanks to my fellow from forum.MP3store.pl (Powered by Invision Power Board) whose personality is known to me and Kingwa, the discrete op-amps designer, I received three types of discrete op-amps from Audio-gd for review. The schematics and descriptions can be seen here: н¨ÍøÒ³ 1 The modules I have tested are: dual OPA-Earth dual OPA-Moon dual …
Audio-gd discrete op-amps reviewed: OPA-Earth, OPA-Moon ...
https://www.head-fi.org/threads/audio-gd-discrete-op-amps-reviewed-opa-earth-opa-moon-opa-sun-v-2.397691/page-2
Sun v.2 at +-15V is the only complete discrete op-amp, with a touch of wooly-woody-something added. The OPA Earth is like a cleaner AD8397 but tonality is not 100% complete. The OPA-Moon is sweet but tonally even less complete.
Audio-gd discrete op-amps reviewed: OPA-Earth, OPA-Moon ...
https://www.head-fi.org/threads/audio-gd-discrete-op-amps-reviewed-opa-earth-opa-moon-opa-sun-v-2.397691/page-10
The LT was actually similar to the OPA-Sun v.2 but won due to smoother and softer presentation. I found it more true than that of the OPA-Sun because the latter felt a bit like hard wood in the texture. Both are the brighter part of the bunch. The OPA-Sun v.2 easily won with the OPA627BP pair.
Audio-gd discrete op-amps reviewed: OPA-Earth, OPA-Moon ...
https://www.head-fi.org/threads/audio-gd-discrete-op-amps-reviewed-opa-earth-opa-moon-opa-sun-v-2.397691/page-7
Quote: Originally Posted by Ron.id Base headamp PCBs One schematic tells more than a thousand pictures! Open loop/closed loop? Resistor values? Grounding? Quote: Sound is so good, powerful, dynamics, tight, wide.... in short, I love it! It would be nice if you...
Audio-gd discrete op-amps reviewed: OPA-Earth, OPA-Moon ...
https://www.head-fi.org/threads/audio-gd-discrete-op-amps-reviewed-opa-earth-opa-moon-opa-sun-v-2.397691/page-8
I sold the Earth so I cannot say how it helps but my Sun v2 improved when I removed the capacitor upgrade. The ones I use in my DAC are better and those from Evox just were making the sound worse. So, I strongly recommend to anybody removing the cap upgrade or placing there some decent electrolytics, i.e. Black Gate STD.
Audio-gd discrete op-amps reviewed: OPA-Earth, OPA-Moon ...
https://www.head-fi.org/threads/audio-gd-discrete-op-amps-reviewed-opa-earth-opa-moon-opa-sun-v-2.397691/page-27
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