Hello, this topic is super interesting. I have seen articles on how to "flatten" the impedance of the speaker,"Zobel Network", as I understand after watching your video, having a flat impedance the transistor does not give more voltage but it does give more current in the impedance areas canceled or flattened by the zobel network. Am I right? Another important topic in the world of audiophilia is attenuators and impedance adapters. Especially with headphones and IEMs. I have seen an online calculator to make a symmetrical attenuator, but you have to know the output impedance of the amplifier and the impedance of the headphones. And this last part is where the impedance is not flat and changes the sound, from white to pink, depending on how you do it. These attenuators are expensive, but impedance adapters are cheap. I would like to make one for my IEMs and attenuate about 12dB without changing the sound much. Could you measure the impedance of the headphones and create the model like the one shown in the video? I know of a utility that, based on an image of the impedance and frequency response graphs of a speaker, exports a txt with the data of the curves, but that's it, data in two columns, X Y. Could this data be used to create a spice model or something? For use in electronic simulation software. I know there is Xover calculation software for speakers and boxes that uses this data, but not an equivalent model for electronic components. Thanks for the videos, I learn a lot.

@ElectronicswithProfessorFiore

4 ай бұрын

Short of a simple headphone adapter for a stereo receiver, I am at a bit of a loss regarding the insertion of attenuators between an amplifier and a load (pun not intended). If the user has the ability to turn the signal down, why not just do that instead of driving the amplifier harder and then attenuating it? As a general rule, distortion increases with signal increases, and then there are the Z issues presented by the attenuator. But in all candor, I don't use IEMs so I don't know what the issues might be regarding levels. What I do know from 50 years as an audiophile is that there seems to be an endless stream of what can be charitably described as "marginal ideas of dubious worth" that float around the community. The bottom line is that if an amplifier has a very low output impedance, the impedance of the load should not matter all that much (regarding frequency response), assuming the load is designed with constant voltage drive in mind. The important bit is that the amplifier designer understands that a complex Z load might push the output devices beyond their SOA (unlike a resistive load) and designs for it.