Amp/Preamp Asylum

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Original Message

Well this is certainly true

Posted by Feanor on June 6, 2022 at 13:00:25:
Let's be aware that the Burson discrete op amps are designed, (in varying degrees depending on the model), to mimic tubes by causing highish amounts of 2nd & 3rd order distortion. For instance see this distortion spectrum for the Burson V3 (as reported by Sparkos labs, see link) ...
Contrast that with the result for the Sparkos SS3602 which happens to be what I prefer in my VTV Purifi amp with VTV buffer ...
I tried Burson V6 Vivids, (supposedly less tube-like), in the VTV but found detail and dynamics to be compromised vs. the Sparkso.
BTW, unlike E-Stat I'm not obsessed about the evils of feedback nor of op amps, (be they integrated or discrete). Old fashioned thinking, (see E-Stat & Morricab), holds that negative feedback is bad because it causes high-order distortion -- and so it does!!. But while small to moderate amounts of feedback cause high-order HD, lots of feedback reduce all orders of distortion, high as well as low.