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Sparkos Labs, Inc. Discrete op amps for amplifying audio ...
https://sparkoslabs.com/discrete-op-amps/
The SS3601 / SS3602 discrete op amps will outperform virtually all audio grade monolithic IC op amps in open loop gain, noise performance, output current, and magnitude of class A bias current. Even the coveted OPA627 monolithic op amp, with a price tag of over 25 dollars, has 30dB less gain and around twice the noise of these discrete op amps.
Discrete Op-amps - Hairball Audio
https://www.hairballaudio.com/catalog/parts-store/discrete-op-amps/
DIY-990 Op-Amp Kit. $32.00. Shop Now. JE-990 Discrete Op-Amp. $60.00. Shop Now. BA512 Discrete Op-Amp. $50.00.
Discrete Opamp - Burson Audio
https://www.bursonaudio.com/about-us/discrete-circuits/
Discrete circuits are custom built by Burson for specific applications rather than an op-amp’s jack-of-all-trades-master-of-none specifications. The art of circuit design yields superior sound in every way in comparison to simple plug-a-chip engineering. A system can only sound as good as its weakest link.
Op Amps - Purple Audio
http://www.purpleaudio.com/discrete-opamps/
Discrete Op amps. Used in all of our equipment and available to upgrade other equipment. None of our op amps are potted, you should never have to trash one of these. We offer long and short pin on KDJ3 & KDJ4. We have had clients purchase 100 and replace all of the op amps in their console. Bulk pricing available. The KDJ 6. Class A input stage.
Supreme Sound Opamp V4 - Burson Audio
https://www.bursonaudio.com/products/ss-discrete-opamp-v4/
The entire discrete op-amp is constructed with audio-grade transistors and resistors that ensure minimal coloration and maximum dynamics. But that also posed the challenge of producing them with very tight component-matching.
Audio Op Amps - It's The Loop Gain You Seek, Not The ...
https://sparkoslabs.com/discrete-op-amps/audio-op-amps-gain-seek-bandwidth/
Introduction: Numerous opinions and preferences exist regarding op amp selection for hi-fi audio circuits.The question we attempt to answer is "Which op amp is the best for audio applications?" We go on Digikey, look up the AD's, LT's, LM's and NE's, and rapidly find our eyes glazing over from specification overload.
Discrete Operational Amplifier - The Audio Pages (Main Index)
https://www.sound-au.com/project07.htm
Opamps such as the LM4562 are almost impossible to beat with any discrete circuit. There is nothing to indicate that an IC opamp with distortion below 0.001% will sound 'worse' than a discrete circuit. The many claims of opamp 'sound' are generally due to non-blind test methods and are mostly (but not always) false.
Discrete OpAmps - Analog Circuit Design · Samuel Groner
http://www.nanovolt.ch/resources/discrete_opamps/
Discrete OpAmps. Designing and building discrete operational amplifiers is a fascinating business for me. Although IC technology is mature, there are still situations where discrete design beats ICs—typical advantages of discrete amplifiers are potentially high supply voltages, high maximum dissipation, much extended options with respect to choice of passive components …
DIY Op Amps
https://www.passdiy.com/pdf/diyopamp.pdf
usually operational amplifiers. Monolithic op amps are the gum drops of linear electronics. The Digikey catalog shows hundreds of such parts with prices ranging from about fifty cents to over twenty dollars, depending on performance, package, and manufacturer. Virtually all of these parts would serve in an audio project calling for an op amp.
Chips vs. discrete – PS Audio
https://www.psaudio.com/pauls-posts/chips-vs-discrete/
An op-amp is a functional amplifier that always has two defining blocks: an input differential pair and an output gain stage. There’s often a third block added, an output buffer. Let’s look at yesterday’s drawing. The Diff pair is the input and the feedback point.
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