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Audio-GD | Underwood HiFi
https://www.underwoodhifi.com/products/audio-gd
The amps use a Real Balanced ACSS Non Negative Feedback Power supply design with the patent pending Applied "Linear Fidelity" Technology unique to Audio-gd. The amps weight 80 pounds each. Signal to noise is greater than 110dB and …
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-10
The discrete op-amps were designed mostly as the replacement for the regular op-amps but also as circuits around which you can build your own audio equipment. On the other hand, when going discrete from the scratch, it's disputable to use global feedback loop dedicated circuits, so let's stick to the upgrade role of the Audio-gd discrete op-amps for now.
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
The most analog sounding are LME49710NA but they exaggerrate in this to the level imaging is blurry, and soundstage slightly congested. The LT1028AN8 is perfect but with its own, very delicate timbre, less present than in other op-amps like OPA2228 or LM4562. Regarding measurements - I can't do that and I don't care for their results actually.
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-17
Audio-gd discrete op-amps reviewed: OPA-Earth, OPA-Moon, OPA-Sun v.2 Home. Forums. Misc.-Category Forums. DIY (Do-It-Yourself) Discussions. ... So the JFET op-amp choice is correct. It's up to the required speed whether you need the AD8066 or might be something slower but more accurate. I like the OPA827 a bit more than the OPA211, is just a ...
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...
Do Audio-GD op-amps still perform poorly? : headphones
https://www.reddit.com/r/headphones/comments/5gefny/do_audiogd_opamps_still_perform_poorly/
Audio-GD doesn't use opamps (although they had a discontinued series of gigantic discrete opamp modules, that were a lot like Burson's similarly huge modules; and a single DAC+amp to plug them into called the Compass), but they use an absolutely phenomenal current conveyer amp design that acts as a single monolithic current mode amp design connected directly to the …
Audio-GD • Magna Hifi
https://magnahifi.com/brand/audio-gd/
Amplifiers with integrated DAC. Audio-GD – NFB11.28 Performance Edition – Discrete Single Ended ES9028 PRO DAC – PCM / DxD / DSD – Pre- & Headphone Amplifier. € 369,-. In stock. +. Digital USB Converters (DDC) Audio-GD – DI20 – Digital Interface (USB, SPDIF, I2S – DSD512 PCM384) € 589,-. Rated 5.00 out of 5.
Unexpected Winner - Audio-GD Master 19 Headphone …
https://www.audiophile-heaven.com/2020/05/unexpected-winner-audio-gd-master-19.html
Audio-GD Master 19 is a heavyweight headphone amplifier that costs the magical price of 880 USD. This makes it far less expensive than some of the direct competitors, and since the list includes Feliks Euforia, Wells Milo, Mytek Brooklyn DAC+, Aune S6 PRO, and iBasso DX220, you know this review is going to be a lot of fun.
Audio-gd's R2R 11 is another 0 R-2R DAC | Darko.Audio
https://darko.audio/2018/06/audio-gds-r2r-11-is-another-350-r-2r-dac/
As its name suggests, the Audio-gd R2R 11 is an R2R DAC with three digital inputs – coaxial, TOSLINK and native DSD-capable Amanero USB – but also a dual-gain-mode headphone amplifier whose 6.4mm socket is governed by an ALPS volume pot.
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