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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/
OPA2604 – a classic audio op-amp. This one can sound really bad when supplied badly. Just see its PSRR specs. Mere 84dB. I could confirm it. Unregulated power supply makes it sound congested, harsh, unstable, messed-up and offensive.
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
Originally Posted by majkel /img/forum/go_quote.gif 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 …
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
Cans : HD650 (balanced), AKG 240M Desktop amps : LD MK III MAX, Jaycar KHA kit amp ( DIY mods), Audio-gd Compass, Audio-gd FUN (DIY mods),Audio-gd C-2C, Audio-gd Phoenix MAX Sources : A-gd FUN, Audio-gd Reference 1 MAX, Vanguard CDM12 Pro, Denon 3910 DVD, Audio-gd CD7 MAX
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-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 ...
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 Op Amp | Overview | Operational Amplifiers | TI.com
https://www.ti.com/amplifier-circuit/op-amps/audio/overview.html
Audio op amps for the most. discerning audio enthusiasts. Building on TI's Burr-Brown™ technology legacy to deliver a superior audio experience. Explore our portfolio of audio op amps and deliver a superior audio experience to your customers. Our Burr-Brown™ and SoundPlus™ legacy has led to the high-performance, ultra-low noise, low power and small-size audio op …
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/
Audio-gd’s R2R 11 is another $350 R-2R DAC. by John Darko June 7, 2018, 11:12. Audio-gd is no Johnny-come-lately. The Chinese company has been making DACs, headphone amplifiers and two-channel components for well over ten years with the value quotient delivered by their PCM-1704-K DAC designs remaining largely unsurpassed to this day.
Audio-GD – P3 2020 Edition – Single-Ended ACSS Power Amplifier
https://magnahifi.com/audio-gd-precision-3s-single-ended-bridge-mode-class-a-acss-amplifier/
€ 599,- Audio-GD P3S Single Ended power amplifier is designed without any compromises using the best components on the market! Like all products of Audio-GD the amplifier is entirely made by hand and for a reasonable price. The analogue amplifier stages of this amplifier are non-feedback and DC coupled without any op-amps, all discrete.
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