PURIFI ApS, Bruno Putzeys Discrete Op Amps: When and Why It Actually Matters “Discrete is an old audiophile hobby horse,” said Lars. “It proves nothing. Consider writing a few words.” Yes, precisely. Doing things discretely has no inherent value. The normal procedure is that y... Eigentakt Jun 24, 2025 0 294 Tech Notes
PURIFI ApS Combating Hysteresis Distortion (part 1: Amplifiers) Our blog post concerning hysteresis distortion got people asking what secret non-hysteretic material we were using then. What is it about our industry that programs people to look for unobtanium mater... Eigentakt May 13, 2020 0 4341 Tech Notes
PURIFI ApS This Thing We Have About Hysteresis Distortion *Read any Purifi interview and someone is sure to mention hysteresis distortion (or iron distortion, same thing). What is it about and how serious is it?* Hysteresis happens in any coil that has a ma... Eigentakt Ushindi Apr 28, 2020 0 6218 Tech Notes
PURIFI ApS Does negative feedback cause TIM? Actually, “TIM” is not so much a type of distortion as a test method to detect Slew Induced Distortion. Nobody calls it that though, and if I need to be pedantic, what we call the animal may not be th... Eigentakt Apr 20, 2020 0 3283 Tech Notes
PURIFI ApS Doppler distortion vs IMD? Let’s get this out of the way first: Doppler distortion is a form of IMD. This is interesting because IMD in general tends to get little interest on loudspeaker forums, whereas Doppler distortion is o... Eigentakt Ushindi Dec 7, 2019 0 7631 Tech Notes
