Can a speaker driver work without a permanent magnet?
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- เผยแพร่เมื่อ 23 ก.ย. 2022
- Hello my friends!
I wanted to test for a long time how a speaker driver works without a permanent magnet. So in this episode my question will be answered.
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Reminds me of how old fashioned speakers were made, before permanent magnets were really a thing for consumers
Man, this video is great with a lot of information, funny humour and electronics. I love it please keep up the good work.
You've done all I needed to try ... Very good job .. loved your trials
Nice project! Just a note, impedance is usually measured at 1kHz and not DC
Nicely explained as always. Best wishes
Hello Sorin, you are the best !! 👏🏻👏🏻👏🏻
great work, sounds beter then all my speakers i ever build
I never thought this was possible, you did the impossible, nice.
i find your videos enjoyable to watch , nice editing , etc. Keep it tot asa =))
You could try to connect the inner electro-magnet to the opposite poles of the voice coil in a hum-bucking setup so the amplifier drives both coils in opposite polarity. This may be more efficient and effective since the electro-magnets would push and pull eachother.
I tried it and it sounds very weak, probably because the electromagnet is weak. it needs a better coil.
@@Sorin_DIY So the idea set me off on a path to look into this and they exist and are called Electrodynamic Speakers. Most are very old but some high-end companies still make them.
@@George.___thank youu I was always wondering if that was a thing since I also thought it would use the energy more efficient but never knew for what to search
@@Sorin_DIY Have you tried both polarities? I imagine only one would work or produce any meaningful sound for that matter…
@@Sorin_DIY I found a video with this exact principle in action!
m.th-cam.com/video/_AtZOcq6EqY/w-d-xo.html
Excellent video. Clear and concise, interesting and informative. I got just one question: "Can a speaker driver work without a permanent magnet?"
You see, you did get asked that question, after all! Hahaha.
great video! ive always wanted to make my own speaker and this is a good starting point.. as a suggestion for non-magnetic speaker, how about a plasma speaker?
I always wanted to do the exact thing you did
Another great video!
Very cool, make more loudspeaker videos, maybe even some that I can use on a daily basis, I think it would be really cool
Excellent vid.
Oh yes ... I’m going to wind this coil by hand as it wold take too long trying to use faster methods ... LOL ... I know that experience all too well. 😀. keep up the great work 😀👍
A fild coil speaker, very coool!!!
Great ideea!
Thanks!
Great power with great responsibility😂😂
Long time no see your video Sorin😁
Just connect ends of vibrator coil and stator coil ,that wouldn't require a seperate power supply ,also help in reduce heating of stator coil due to ac current flowing in it
Hi Sorin, Sir, u e awesome as always, im still learning a lot from ur vlogs, plz keep doint it, u r bless for noob nerd like me 😁.
Could u build a solar power station, portable, for a solo off-grid stealthpacker like me. Teach me the simpler way, i believe so many people like me need it.
Big Thanks
Throw it in an enclosure tuned to closer to the mid range bandpass.
I was hoping to see an attempt at powering the electromagnet with another audio amp as some bonus footage.
Will it be better if we use the same audio to feed the magnet instead of DC current or on top of that?
No, it sounds better with the audio signal in the voice coil.
@@Sorin_DIY
Well, coils like AC more than DC and also that's one of the advanages of using dynamic magnet.
Did you check the material of those washers? I think the magnetic saturation and the permeability may not be very high, which makes the magnetic field less powerful. Of course, better materials may be hard to find.
Also, the suspension could be a little tight, if it's only the material that has to stretch. You could probably get better bass with a suspension of which shape also stretches, not only the material.
I know you probably intended to make this just as a test. But I wanted to share a little knowledge if there's someone who's interested in going further with this design. Thank you for the good video! 😃
Hi. in this video I only wanted to test this theory, so I built a simple speaker driver. in an older video I built a much better speaker driver that sounds pretty good. this speaker suspension will work for medium range drivers. these washers may not be the best material for an electromagnet, but this is what I could find. the coil is very important and also the position of the coil, to concentrate the magnetic field where is needed.
1:54 killed me 😂😂😂
Hi I love your video.
Aye same yen9
Teşekkürler
Put a heat sink and thermal paste to the electromagnet, years ago I had almost the same idea but lack of materials and budget is always my great enemy, it took me 2 years to make my stun gun and almost same amount of time to my workbench power supply after that it has been 3 years now and i have not completed my gauss rifle
bro
will the speaker work if the magnet coil and the voice coil are connected in series ????
(without using bench power supply)
if you connect the coils in opposite polarity, the speaker will work, but very weak and very distorted. it's not usable.
I figured a way to do it with no magnet or coil or any power source. I think if I put a coil on it that it would just melt.. so I substituted the coil for spinning plasma. Maybe you would like to help me out on my project. I'm going to build it very soon. I designed a couple of speakers made of granite and I mount them facing in opposite directions but sharing the same center. It should make a doughnut around it and levitate. I have all the parts designed. It's a thermoacoustic device.. using sound to make heat and sound to spin heat in a doughnut where it condenses into water that gets vibrated apart into hydrogen and thermally heated into plasma and spun in the same doughnut. I'm more of a mechanical person... some help or advice with the speaker part would be appreciated. I will figure it out eventually once I build it if I need to put an electromagnet on it. It's an ac device using water with no fuse and so the amperage could go quite high....I could put a magnet and coil on it but that would be too easy.... my idea is that it may not need it... for sure it doesn't need any wires because the sound is coming to it wirelessly....old school way with a wireless microphone. I eliminated the need for wires and an amplifier by using a 454 lb xylophone key as a microphone and having it rest on the edge of the disks... transferring the vibrations it picks up directly to the disks...It makes it wireless. The disks in turn take the sound and blast it into the underside of the xylophone key in a feedback loop. The sound created inside spins everything in a doughnut.. and all the cold air gets sucked though the center hole of the disks in a continuous doughnut... the spinning plasma becomes the coil and the current conducting through the granite disks creates the vibrating magnetic field.... and so I think I eliminated both. Come to think of it .. the galaxy is the same thing.. spinning plasma and no permanent magnet or coil.....
Didn't think this would be possible
Old radios from the 30s did this. The magnet coil was called the field coil, and served double duty as part of a pi filter for the power supply too. At that time no alloy would hold a high amount of magnetism for a long tme.
@@marka1986 wow
Heres a little fun fact:
A voice coil is basicly a ElectroMagnet!
(But just modified so that it can vibrate the speaker cone)
Building it into a Styrofoam box should've made a fairly decent speaker.
Next step, put it in a box. I’ll bet it sounds even better.
What happens when you have two voice coils, one inside the other, driven from opposite polarity signals?
it will create sound, but very weak. a permanent or eletro-magnet will create a much stronger magnetic field.
What if you powered the electro magnet with the audio signal passed through a rectifier? Would it work?
it will probably work, but the sound will be very weak, unusable.
i have driver without magnet and it has impedence of 8 ohms it works well and only produces trebles or highs
Attach it to a piece of glass on the front, should sound better.
👍
Very early speakers and headphones used an electromagnet driven by the amplifier to move a metal diaphragm, I had a speaker for a short time that worked that way. Super inefficient though.
They would also use the speaker coil as part of the DC power supply filter.
@@stevebabiak6997 Yep, a 3rd for a choke.
The main thing this speaker is missing is a good *magnetic return path.* As shown, the return path is long and through air... very bad for performance.
But old speak on old radio didn't have a permanent magnet.
A speaker can work without permanent magnet for example my Fertin LB12 EX with an exiting coil and his power supply DC
Interesting
use a drill on slow speed to wind the coil
bro can you make a Emergency Flaslight torch that is powerful to lit up a standard room of 10mx10m i mean a small Flaslight without fan
Yes, I plan to make something like that in the future.
@@Sorin_DIY ok brother thank you very much
Or piezoelectric speakers (crapy but can do the job).
way too many ransformers references lol, Optimus Prime would be proud, Megatron would replace Starscream with you
can you make a Bluetooth headphones from scratch pls?
anyone with a brain would instant know
yes
there is a thing called electromagnet
and heck, there is also something called piezoelectric speaker
I suggest you to buy a 20$ oscilloscope kit. it will be very useful and you can upgrade to a bigger one when u have the money for it.
So, what if all permanent magnets stop halfway through the video? What then?
See, why DC why don't you hook the electromegnt to the same lines as the voice coil ?!
It will work, but the sound will be weak. the electromagnet needs a high current to create a strong magnetic field, the amplifier is not powerful enough.
@@Sorin_DIY ok thanks I didn't know it, but in hind-sight it's quite obvious, that the sound will be weak
Wa sorinel wa fa si in romana cate un clip
Hmmm...if you used two coils that repulse each other...just a stab in the dark here
if you connect the coils in opposite polarity, the speaker will work, but very weak and very distorted. it's not usable.
@@Sorin_DIY I see. Thanks,man
Cool idea, but it doesnt worth it i think
It would be better if you made both coils the same resistance and conected them in reverse of each other
oc its well worth it, its Rough ready & works... now You go & make it work better now you know how.
I don’t think that would work because both coil fields would change at the same time so it either always push away or attract
como hacer amplificador de señal 4G O 5G para celular
th-cam.com/video/MNJL1OhKDMY/w-d-xo.html
Most speakers sound like crap so this might be better and you wouldn't know.
I'm 3rd
Who is f from Phillipines here
Sir please you can hindi speaking
This is old tech nothing new...