hasmac
New Head-Fier
- Joined
- Mar 4, 2017
- Posts
- 31
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- 52
It must be the same as a regular dynamic, the impedance is in the same ball park, my Akai ASE-40 is 40ohms pushing a 40mm membrane, and it doesn't have a problem with volume.
Nice work, but I think you can increase the trace area.
What's the technical reason behind the snake-like shape of the foil in planar magnetic designs? Increased resistance? Less mass? Ignoring the drive requirements for a moment, would an unetched piece of foil work just the same? I would think the larger conductive surface area and wider magnetic field would give it more uniform control.
If I recall, the strength of an electromagnetic field is determined by amps x turns so I will simply make mine as close to zero ohms as possible using an unetched piece of metalized film with a single polarity on either side of the diaphragm and turn up the current. Seems like it would work correct?
I have an amp that can drive zero ohms so the driving requirements aren't a problem.
This is called a ribbon driver
I'm also curious about that amp you speak of that can drive a dead short.
Cool topologies that can do cool things do exist.
After that test I relized that I NEED to build good headphones cause I'm absolutely not impressed by top headphones (especially when I read price tag).
You're absolutely right! But I've already shown you my current design
Active surface is 54 cm2 or ~8,4 squar inches. For example Audeze has ~6,2 sq. inches. When I compare big and small membranes that's the same story as when you compare big speaker with 15" woofer and bookshelf speaker. They even can have same bass extension, but I'm sure you understand about what I'm talking about.
Great work!!! is it possible to do with aluminum because copper traces will corrode faster.
Hmmm, aren't ribbons just skinny strips of foil? I would think that an unetched metallized mylar film in a planar driver shape would be a bit of a crossover between the two. I don't think a pure ribbon headphone would have good bass either.
It's called a transconductance amplifier. It will sound terrible on almost anything other than a ribbon because most drivers are designed for voltage amplifiers. I would have to design it to spec but it would work wonderfully into zero ohms.
You have no idea, I spend too much of my time designing said topologies and my designs make the "flagship" big name amplifiers on the market sound like garbage in comparison. I'm trying to build my own amplifier company because it's disgraceful what passes as the standard for a "good" amplifier, especially at the prices people charge.
There really has been almost no innovation in the audio industry in many decades.
Thanks! Let's continue my story. I've made several 40 ohm membranes with 0.25 traces. You can see a result on embroidery frame before glueing.
I've made on cnc router sample enclosure for measurements and listening tests.
By the way, have you ever heard of a beam deflection tube