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N1EU's Audiophile Op-Amps - QSL.net
https://www.qsl.net/n1eu/Audio/OpAmp.htm
Audiophile Op-Amps (the author and accuracy of this information is unknown) While op-amps are not normally renowned for their audio prowess, they're sufficient for the amount of current needed for headphone use--but only if you get good ones. The Burr-Brown 604 used in HeadRoom's less expensive products is about as good as audio op-amps get.
Audiophile OPAMPs List here and post your impressions ...
https://www.head-fi.org/threads/audiophile-opamps-list-here-and-post-your-impressions.238894/
Recent king in the audiophile OPAMP arena seems to be National Semiconductor LM4562. Focal Clear Pro, Hifiman HE-560, Hifiman HE1000 V2, Westone W80, Headamp GS-1 + iFi iUSB 3.0 > IFi iDSD BL > iFi iTUBE 2 > iCan SE + Topping D50S > JDS Labs Atom + SONY NW-WM1A > 5QS / AM3D, + Gustard X16/H16, Topping D70S + iFi Zen Stream, Raspbery Pi4 Moode ...
The Top 10 Operational Amplifiers on SnapEDA – …
https://blog.snapeda.com/2019/10/23/the-top-10-operational-amplifiers/
Op-amp - DIY-Audio-Heaven
https://diyaudioheaven.wordpress.com/amplifiers/solid-state/op-amp/
Op-amps consist of the same basic building blocks as that of most amplifiers. A voltage and current amplification stage in one, represented by the 2 blue triangles shown on the left. They have 2 inputs. 1 positive (non-inverting) and negative input (inverting). Op-amps have VERY high amplification factors (in the thousands to millions).
Q17 - a QUAD405 audiophile approach to perfect sound ...
https://www.diyaudio.com/community/threads/q17-a-quad405-audiophile-approach-to-perfect-sound.374507/page-15
2021-09-14 11:52 pm. #295. For the most demanding audiophiles, we designed a classic source, both to build an amplifier and to replace the original source in QUAD-405. Capacitors with screws of 51-52mm diameter and a capacity from 22,000 uF to 51,000 uF and a voltage of 63Vdc can be mounted.
Op amps vs. chips | Audiophile News & Music Review
https://www.hifianswers.com/2021/10/op-amps-vs-chips/
Op-amps have been around since the 1930s. They were originally built using vacuum tubes. The term itself, op-amp, is short for Operational Amplifier. There are multiple types of op-amps, but for our purposes, we'll focus on the standard voltage amplifier so often used in audio circuits.
What's the absolute best opamp for audio purposes? | All ...
https://forum.allaboutcircuits.com/threads/whats-the-absolute-best-opamp-for-audio-purposes.62897/
What kills audio quality in op amps is called crossover distortion--this occurs at mid-voltage when the current output changes directions (different output transistors are switched on). It tends to be a fixed level of distortion voltage--not very noticeable at rail to rail output, but very noticeable at low signal levels.
Q17 - a QUAD405 audiophile approach to perfect sound ...
https://www.diyaudio.com/community/threads/q17-a-quad405-audiophile-approach-to-perfect-sound.374507/page-8
Muses01 exceeded my expectations in sound signature in a pre-amp application. Got few of those left over, not cheap though. No harm testing those in Q17. We shall see how it goes. Got plenty of other regular op-amps available as well. If the current pcb doesn't allow op-amp rolling, it should be considered as a room for future improvements.
Cycfi Research
https://www.cycfi.com/projects/six-pack/op-amp-shootout
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