02-05-2026 Post does not mapped to Knowledge Tree Edgar= Posts 50 Joined on 02-13-2021 Post #: 1 Post ID: 29572 Reply to: 29572 Do You Really Know How back EMF Works in Your Audio System? https://youtu.be/6Nxb3h2zd20?si=HjSLisose9LI0-8Y

02-05-2026 Post does not mapped to Knowledge Tree Paul S San Diego, California, USA Posts 2,834 Joined on 10-12-2006 Post #: 2 Post ID: 29573 Reply to: 29572 Application? Hi, Edgar. For sure back EMF is a factor in driving "FR" loudspeakers with amplified audio signals. It looks like this guy is trying to sell more efficient motor/generators? Have you figured out how to apply this idea to loudspeakers driven by amplified audio signals? One can hear differences with differing A/V clipping curves with amps I've played with. Loudspeakers are +/- reactive loads, which we generally try to avoid with motors/generators in industrial applications. There are crossover tricks that aim to make life easier for amps, but the real trick for me so far has been what I hear in the end. Best regards, Paul S

02-05-2026 Post does not mapped to Knowledge Tree Edgar= Posts 50 Joined on 02-13-2021 Post #: 3 Post ID: 29574 Reply to: 29573 Good question I feel like a lot of speculation would need to happen before getting anywhere near how to translate this into a result for audio. I have no idea, but back EMF is present at every stage of an audio system so its relevant to every component. If I had to make an early speculative bet, I would say transformers are what component could benefit most, maybe followed by loudspeaker motors but who knows? first audio designers would need to embody this information pretty deeply before we are going to see anything remotely like a result for audio. I'll offer a question for the sake of speculation. Do you know what frequency military aircraft electrical systems operate at? Its not 50/60hz like our grid, it's 400hz. Why? Engineers will tell you it makes for a lighter and more compact system because it allows for the reduction of the size of the iron cores with the increase of frequency. If that were the only factor, why stop at 400hz, why not go much higher in frequency like 4k or more? They definitely can if they wanted to but there is a reason they don't. Why?  I know the answer but do you? CLUE- there is something else happening in iron cores at 400hz. what do you think it is?

02-05-2026 Post does not mapped to Knowledge Tree Paul S San Diego, California, USA Posts 2,834 Joined on 10-12-2006 Post #: 4 Post ID: 29575 Reply to: 29574 "Something Else Happening" Early on in electronics DIY I was surprised to learn the differences between "what the equations predicted" and what I was actually getting, in terms of measurements and sound. For instance, I was initially surprised to find that "non-inductive capacitors" were a thing, and one way that was done involved a lot more winding. I mean, how could that be "better"? I've read about some ideas for "solutions" to (audio) problems that bring Rube Goldberg to mind, and I tend to lean toward Ockham. If I start reading more and more about great success along these lines, I might look into it. Part cynicism and part exhaustion, I will let someone else do the heavy lifting in this case. Not to brush it off, but I don't have the education or the experience to see the audio application. Best regards, Paul S