Rerurn to Romy the Cat's Site
In the Forum: Horn-Loaded Speakers
In the Thread: New superlative horn build - ESD acoustic
Post Subject: Thank youPosted by jackydai on: 4/1/2019
Well that was my father. We founded the company together - he invests, I researches, mostly. Bruce Edgar and Sam Saye taught me how to design, and we built our first prototype system in California.
Think I need a bit more clarification on the five times modification I referred to. It’s not just five small changes that I was talking about but five generations kind. Every time it’s like half the work of designing an entirely new system. This was part of the reason why Herbert Reichert gave us entirely different opinion on the New York show. If that does not suffice then I’d hope people joining the upcoming Munich will post some thoughts here. I’m confident about this.
Perhaps I’m not good at the choice of words to say “best speakers”. What I meant by that was to get as real as possible, instead of certain flavors that people like. In the field of Artificial Intelligence there is this famous Turing test, where if people cannot descern an AI from a human being by its answers to different questions, then the AI is a successful strong AI. I’d like to apply the same concept to the field of audio: If a person cannot tell music played by an audio system from that of an actual band, then it’s a successful real reproduction. So yes, “best unconditional solution for sound reproduction” is a better description. Thank you.
A few other explanations to the things we are doing:
1. Why carbon fiber. Carbon fiber is far more resonance-free than glass fiber and wood. It’s also not sensitive to heat and humidity, and super stiff so that the shape of our sub-bass-horn is possible. Besides, China is the only place to do carbon fiber at this scale, at least at a reasonable price. Imagine the cost of building a 2 meters tall carbon fiber horn in Europe or the US. The horns alone can cost for a whole system.
2. Why field coil and high magnetic density. Lenz laws decides that when voice coil moves it creates back EMF which tends to draw itself back. In field coil we can balance this back EMF out by feedback circuit, making the sound more loyal to original signals. Also, field coil does not decrease as permanent magnets do, so the drivers can be used for decades without diminishing. What we have done differently to traditional field coil (like Western Electric) though, is that we developed constant current power supply instead of constant voltage, because the magentic field is decided by current not voltage. With constant voltage, when the field coil heats up, its resistance raises up and its current drops. As for high magnetic density, it provides more control to the voice coil, resulting in lower THD and better high frequency extension. It also raises the sensitivity, making more choices of class A amplifiers suitable.
3. The choice of music on show. We do play lots of European music common audiophiles listen to, but the media reporter in the video asked us to play the music he brought. There had also been reporters who asked us to play Chinese music to illustrate our background in their reports. Perhaps you can call it stereotyping.
Please correct me if I used wrong words again. Thanks.Rerurn to Romy the Cat's Site