The traditional way to reproduce audio is to have a separate source (+DAC), a voltage-drive amplifier, and a multiway loudspeaker with a passive crossover. Most non-linear distortions are introduced by the loudspeaker, whose drivers are essentially the same as 100 years ago. Room distortions aside, what can be done to the drivers to sound better?
There are ways to cancel mid-range distortions by adding an extra non-moving coil that cancels the magnetic field if the iron parts surrounding the voice coil. After much experimenting with prototypes, I found that the best and most robust approach would be to feed the voice coil and the non-moving coil with two separate amps. The details are in the .pdf attached. Then you can add a thin velocity-sensing coil and control low frequencies. You'll need a DSP like the TI C28xxxx, which already has ePWM modulators and a high-speed instrumental ADC. These DSPs allow the ROM security locks - so that the design becomes unstealable.
I am just a scientist. I can build prototypes to verify the ideas and test them through and through. But there is a difference between a prototype (taking half a room, with a total wire mess) and a compact industrial product, which can pass all certifications and be integrated in a normal-sized loudspeaker. To implement something of such complexity, I am looking for a partner company that has relevant capacity and is willing to step up to the advanced solutions, well above the audio industry's stone-age state-of-the-art. Is Aiyima such a company?
There are ways to cancel mid-range distortions by adding an extra non-moving coil that cancels the magnetic field if the iron parts surrounding the voice coil. After much experimenting with prototypes, I found that the best and most robust approach would be to feed the voice coil and the non-moving coil with two separate amps. The details are in the .pdf attached. Then you can add a thin velocity-sensing coil and control low frequencies. You'll need a DSP like the TI C28xxxx, which already has ePWM modulators and a high-speed instrumental ADC. These DSPs allow the ROM security locks - so that the design becomes unstealable.
I am just a scientist. I can build prototypes to verify the ideas and test them through and through. But there is a difference between a prototype (taking half a room, with a total wire mess) and a compact industrial product, which can pass all certifications and be integrated in a normal-sized loudspeaker. To implement something of such complexity, I am looking for a partner company that has relevant capacity and is willing to step up to the advanced solutions, well above the audio industry's stone-age state-of-the-art. Is Aiyima such a company?
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