How does a speaker work?

In this clip I demonstrate how a speaker works, in this case a guitar speaker. I go through how the ingoing parts such as the magnet, voice coil, voice coil former, back plate, front plate, pole piece, cone, gasket, suspension, spider and dust cap are related.

[@robbes7rh]

Thanks, Johan, for answering a simple question in under 5 minutes, using clear diagrams, just the right amount of science, and a concise, well-recorded narrative. Yours is a procedure I wish more people who make instructional videos would follow. I'm looking forward to watching some of the other selections in your impressive video catalogue.

[@JohanSegeborn]

Thanks! Very glad to hear that! Cheers Johan

[@PsyWalks]

I still call it magic that whole voices come out of this wonder machine

[@jeevanjyoti3930]

This is the way of telling something in an intelligent person's manner
Without any decoration but just education
Keep it up

[@magnusdenyer2424]

R/iamverysmart . You reek of ego

[@OneStonedBear]

Damn. I always wonder how a speaker works when im stoned. This explains everything...

[@JohanSegeborn]

+OneStonedBear :-)

[@sixbe9002]

OneStonedBear bruh im watching this and that magnet looks like its jerkin off

[@ammaryasir2270]

@@JohanSegeborn Where is the next video that explains how speaker produces different kind of spunds?

[@cxllion]

@@sixbe9002 Lol....

[@jeffreywilliams3030]

im stoned

[@bejalm9489]

This video really healped me find out who i am

[@JohanSegeborn]

+Bejal M Thanks my friend :-)

[@elijahjflowers]

Same.😂

[@user-bv4ec1oe9n]

@@JohanSegeborn Thank you

[@theargument9422]

And who are you, a bass or a tremble?

[@unboxalicious]

@@theargument9422 he a spider

[@johnnytheg]

I've literally watched dozens of videos on this subject, but this video clearly explained everything in a way that made total sense. Thanks!

[@weatherataglance6075]

Great video! I’ve been wondering how speakers produce sound for years now, so I just decided to look it up today!

[@reeselively7581]

you have a great narrator voice

[@JohanSegeborn]

Thanks :-)

[@arcaneaion4477]

Omg even I was gonna say that .....your voice would be so good to hear on audiobooks 👍👍

[@mrfrosty8883]

Literally when you said look up Faraday law I looked it up and it explains so much it's amazing what you can learn it in just a few minutes

[@bas-into-games]

perfect explanation for someone who does not understand anything at all, thank you, good job, well done.

[@chrisalvarez3013]

Your explanations were so calm and clear! Thank you!

[@JohanSegeborn]

Thanks Chris, great to hear that!

[@christophergavey7445]

Thanks man, spent ages looking for a good discussion on this :)

[@JohanSegeborn]

***** Thanks, glad if it was useful. Cheers Johan

[@DrGadget424]

Thank you professor Snape for the great video.

[@UnluckyFoxRot420]

This was one of the most helpful videos I have watched.😁😁😁😁

[@scriptKiddieOG]

Expertly explained! Cheers!

[@EliteWolves1]

Thank you Sir this really helped me for College, thank you very much :)

[@JohanSegeborn]

Thanks, glad to hear that! Cheers Johan

[@GM-Real]

explained in very simple and interesting way . thanks

[@JohanSegeborn]

+gurpreet singh Thanks, glad to hear that!

[@endleesravidassia8606]

Today my seminar of how work a speaker and this video is very useful to my seminar according to Punjabi videos ..thnx u so much

[@bimazivanovic4784]

Exolained really well, thanks a looooooot man

[@vigneshkrishnamoorthi8247]

awesome lesson . internet bringss passionate teachers closer to eager students

[@josephdonahue2996]

I am a physics major and think I understand the Lorentz force equation... the magnetic field inside a ring magnet should resemble the force inside a solenoid, which is all in one direction with the same direction as the axis of the magnet. The voice coil is within this uniform field, with lets say the field pointing up at every point on the voice coil. If I pick a point on the voice coil and do the "right hand rule" for a cross product of current with the magnetic field, I get an "outward" force on the coil at each point, as if the coil is being forced to expand. This doesn't produce a force upwards or downwards on the coil. If I want the right hand rule to produce an upward force, I need the magnetic field(or some component of it) to be pointing "inwards" at every point on the coil. This is best produced at the ends of the magnetic gap or even outside the magnet... so is the ideal rest position placing the coils near the top or outside of the magnetic gap?

[@m.sachinkumar7156]

ur voice is soo comforting...!!

[@Chronix74]

Great explanation for my curiosity, thank you good sir.

[@JohanSegeborn]

Thanks, glad to hear that!

[@wedad1930]

Thank you so much ..That was really great and helpful..

[@ghostboy1825]

im only watching this because of school lmao

[@mradrinaline43]

Yeah me too

[@sheebasheebarg6879]

I'm a 10th standard student. In our text book this is very hard to understand. But when I watch this video this is very interested. 🤗🤗

[@JohanSegeborn]

Thanks, that’s great to hear!

[@EjMacarus]

Thank you for the video! I will have to admit I wish my lectures would be voiced by you haha. Cheers!

[@johnroberts838]

Excellent video, thank you.

[@Usuallyjustahuman]

Johan thank you so much! I like your demos and tutorials really much. Please keep on doing this good work and benefit to us. Greetings from Germany

[@JohanSegeborn]

Really glad to hear! Cheers Johan

[@Usuallyjustahuman]

Btw: Where is part two? I am really curious :)

[@JohanSegeborn]

I'll be doing that one sometime soon I hope. Cheers!

[@thefuzz4447]

I still don't get it.. but I LOVE this channel and Celestion speakers!!

[@rafaelbrenerrosa]

Johan, great video. Just exactly what i want to know.
Thanks.

[@JohanSegeborn]

+Rafael Rosa Thanks Rafael! Really glad to hear it

[@bat_1906]

this actually helped alot with my homework, thanks!

[@joelmiddaugh8229]

It's crazy how Dr. Johan has a much more British sounding voice than regular Johan.

[@MR0DDB4LL]

indeed. it's also pronounced differently, something more like yuw-hahn (with stiff upper lip)

[@SLASHERamc]

This is amazing.

[@connorferrand527]

Brilliant teacher

[@sarinapaparone]

A brilliant tutorial for a scientific dummy like me. Great stuff...I actually understand it thus far!

[@JohanSegeborn]

Thanks Freo, Glad to hear that! Cheers Johan

[@albinrakeshkumar6724]

My tution sir discribed same as you but you demonstrated it super......

[@JohanSegeborn]

Thanks man, I’m glad to hear that!

[@miftazalabdullah1376]

Helped a lot bro!😉

[@payalthakur3856]

Nice Explanations.

[@wonkaytry]

SO GOOD! Thanks!

[@JotheezJO]

Thanks...me and my friend had a conversation about it ....so we youtube it...and found you...thanks ....

[@AhmedSC]

Great video

[@xtasyrinald]

Clearly Understandable one...Thank you so much for your effort Sir.

[@JohanSegeborn]

Thanks Rinald, glad you liked it!

[@Adityak1997]

Brilliant way to teach thanks and keep it up

[@JohanSegeborn]

Adityak1997 Thanks, Really glad you liked it! Johan

[@druckaudio9756]

Thanks for the explanation

[@The_rajalat]

Thanks!
I can now make my own 😊

[@miscellanywell]

GREAT VIDEO! THANKS

[@ArunKumar-eq9jd]

awesome work

[@JohanSegeborn]

+Arun Kumar Thanks Arun! Cheers Johan

[@nikhilsakoji8020]

Excellent explanation sir

[@JOZBITsBEATs77]

Good lesson

[@benokhattirach310]

Amazing video!

[@JohanSegeborn]

Thanks, glad you like it!

[@hirenparmar2934]

Very nice video and explain

[@ricardocardo4718]

Perfection!

[@AtomicMug]

Hi, Johan! I can't get enough of your channel. Brilliant.
I was wondering if you could explain sometime WHY different speakers sound different from each other from an design/engineering perspective?
For example, Creambacks and Greenbacks LOOK like they're constructed similarly: Basket, paper cone, voice coil, ceramic magnet...
But what is it that makes them emphasize different frequencies to sound different?
For example, if I got a brand new Greenback and immediately re-coned it with a non-Celestion replacement cone, would it still sound like a Greenback?
Why does an Alnico magnet make the speaker sound different from a ceramic magnet or an electro dynamic magnet?
There are a lot of guys on CZcams who do speaker A/B comparisons, but you're an engineer and understand (and can explain) the actual mechanics better.

[@goatmeal5779]

Thanks! This helped alot!

[@JohanSegeborn]

Thanks Glad to hear it!

[@iamtheman8889]

Good and useful

[@waterdragonsage8460]

Thanks for the vid. I'm going to make the best headphones in the world one day so now I'm just making my own headphone speakers to test out.

[@foreverduke4059]

So whats your progress on your mission

[@mxtchamilkyt2228]

For headphones not normal magnets you should use rare earth magnet to use it bigger speakers is a normal magnet

[@didarulislam1402]

Sir did u made the headphone

[@waterdragonsage8460]

@@didarulislam1402 Not yet, i had a design, but i'm going to postpone designing for the time being. For the current best headphone look up the raal requisite head speaker.

[@topten7064]

Very nice

[@FirebrandVOCALS]

Good Video .. Cheers!

[@avieus]

Great voice

[@saleems6409]

may be this is six years ago..but for me new video...tq Boss

[@lightningboltfiresnake4952]

thank you for the amazing video i owe you my life father please keep your faith in the sun alive

[@VisionElectricAus]

very good presentation.. thankyou

[@JohanSegeborn]

+Vision Electric Solutions PE Thanks!

[@karimaddas7617]

thanks for the lovely video. the reason there is a force on the coil is not due to faradays law. if a wire with a current exists in a magnetic field, it experiences a force due to the magnetic part of the Lorentz force law

[@rohitbhatt9223]

Nice video help me alot in exam thanks

[@KajHeGeHaggman]

Interesting, thanks!

[@JohanSegeborn]

+Kaj Haggman Thanks Kaj!

[@aronkay5274]

THANKYOU so much Johan! You are an amazing Teacher
Wish I could talk to you face to face. Ive always been perplexed about speakers.
I do have a question: In a movie scene we may have a bird chirping and a person talking at the SAME TIME. How does the diaphragm produce these two pitch's simultaneously if it can only move at one frequency. Either it moves at pitch of bird or the person. Do you understand my question? I havent got a straight answer from anyone at university!

[@JohanSegeborn]

Thanks! Really glad to hear that! They are superimposed, It's like a string with all its overtones. Check out this clip!
czcams.com/video/q-Z4kndewSw/video.html

[@TTT-V]

this was what I exactly looked for

[@rojasnando4771]

muchas gracias !!

[@rakesharagodi6929]

Helpful

[@harshachary8438]

nice information provide for speaker
thx

[@JohanSegeborn]

Thanks, I'm glad to hear that!

[@mhvdm]

I've always wanted to know how a magnet fucks a coil
Without joking, great video!

[@JohanSegeborn]

+Memeson Thanks man :-)

[@mukundathakur5097]

very interesting sir. you know i am fan of physics. there was an old speaker at my house. i knew that every speaker had a magnet. so i was eager to crack that and take out the magnet to play. but after i did it, i really didn't like to destroy it. i am planning to remake it in my own way and understand the mechanism so i will present in the science exhibition. help m with your appreciative videos.

[@JohanSegeborn]

Mukunda Thakur Thanks! Glad to hear that. Good luck with the exhibition! Cheers Johan

[@EduPhysicsByMG]

Nice

[@TimpBizkit]

The pole pieces convert the ring magnet with a pole on opposite sides into a bent horse shoe magnet with the poles facing each other in the gap. Well imagine a ring of horse shoe magnets with the poles bent inwards to create a narrow ring shaped corridor with the north pole on one wall and the south pole on the other. In this sits the coil of wire, held in place perpendicular to the magnetic fields, such that the ring magnetic fields induced in each wire produce the strongest force upwards or downwards.

[@javiceres]

Perfect

[@thecctwinsoutdoorandgaming9847]

This is something the should do in school

[@pytheus]

Thank for this video, and all the others Johan! Really great work and the comparisons are wonderfully informative! I have noted the lack of the JCM 2000 DSL 100 (or any other JCM2k TSL) in your vids. Please, is that amp not worthy due to tone or workmanship or ... ?

[@JohanSegeborn]

+Derek P. Thanks Derek! They are worthy indeed, I just haven't got a an opportunity, but I've had many requests on those lately so they're prioritized now! Cheers Johan

[@manavgoyal3828]

Good video

[@JohanSegeborn]

Thanks!

[@darshan_9052]

Nice💯

[@dkoning373]

Thank you

[@alexlee6129]

Thanks for the great video! I just have one quick question. What is the difference between the mechanism introduced 0:10 and the one you talked about later on. I made a simple speaker with the first method, and it worked just fine, does the latter produce a different sound?

[@JohanSegeborn]

+Alex Lee Thanks Alex! I think they are the same.
The first concept where the magnet is moved through the coil and a signal or current is induced is basically a microphone. In a speaker you instead have a signal/current that you wanna transform into movement. Cheers Johan

[@TimpBizkit]

You get a stronger concentration of field lines at right angles to the coil with the second model, so it is more efficient. Field lines at right angle to the current flow gives the most force.

[@ron030363]

With bass at high volume, the excursion of the diaphragm or cone would cause the voice coil former to hit the inside back up the magnet structure. They make us believe the illusion of this cannot happen and this creates anxiety for the spirit due to fear of damage

[@pyroman6000]

Lol- why is it you sound Swedish in some parts and British in others? Nevertheless interesting video, thanks!

[@kylelikeskjvbible]

He may have learned English from someone who sounded British? maybe a British teacher in school, or a movie, or something else?

[@prashanthyarram4273]

Thanks a lot

[@JohanSegeborn]

Thanks!

[@pleximanic]

Best channel on youtube!
I wonder what happens if you degauss the magnet?
Have you tried it?

[@JohanSegeborn]

Thanks, really glad you like it! :-) havent tried degaussing, I assume it increases compression and reduces attack. Cheers

[@mikymony3477]

AWESOME

[@JohanSegeborn]

Thanks! I really appreciate it! Cheers Johan

[@moosicnsk8]

great video ma, really helpfull, qhere a i found the continuation?

[@JohanSegeborn]

Thanks! Haven't gotten around to do that. But I will soon! Cheers

[@pachathavala]

Thank you John....can you please add the link of next video on subject

[@impraveen777]

Nice plz put more videos

[@esmeulonsouzadeoliveira3636]

Esmeulon - Gostei
.

[@kianoosh.]

great video !! where is the link to next video?

[@Thunderst0rn]

very interesting video
btw you sound very like the officer crabtree in allo allo :D

[@JohanSegeborn]

Thunderst0rn Thanks! ..and I'm afraid you're right. Cheers

[@farahiqbal4667]

Thanks

[@miguelvallejo7289]

like. thanks!

[@JohanSegeborn]

+gto80601 sonicboom (gto-eight0six0one) Thanks!

[@stcommet505]

I feel like this would be a great South Part episode...

[@CasamTheAnimator]

Yeah and the speaker includes windings, it needs an electrical audio circuit to work, when you only connect to electricity, it generates frequency sound.

[@SamVieiraGuitar]

Thanks a lot for the video!! Im using a tube amp, and im sure you are aware that I cannot disconnect a speaker out of the amp while it is on because it will damage the output transformer. So I was thinking, can I remove the coil out of a speaker and wire it to a jack and use it as a dummy load for the amp? This was I can use the DI out without having to use the speaker, so is it possible?

[@abhihobby]

Hi john it is really great explanation.I want to know much more detail means if x is my input voltage then how much sound pressure generated by diaphragm movement.

[@JohanSegeborn]

Thanks!
Check these links out: Say that you have a 50W amp and an 8Ohm Impedance Speaker corresponds with a voltage of 20V and a current of 2,5A. Try it for different values.
hyperphysics.phy-astr.gsu.edu/hbase/electric/acohml.html
In the second link you can relate input power to the element sound pressure level at some distance. ((One interesting thing to note is that doubling the effect of the amp is basically same as the difference between a Greeback G12M of effectivity 96dB and a V30 of effectivity 100dB.))
www.hometheatrebasics.com/home-theatre-tools/spl-calculator/
Cheers!
Johan

[@benmacpherson2675]

grouse video johan have learned so much from you already just wondering i have a fender bassman and it has greenbacks in it. i would love to know exactly what that means. what makes it a greenback shorly its not just a colour thing. just trying to understand my amp better. cheers johan your the best. there jensen if that means anything

[@JohanSegeborn]

+Ben Macpherson Thanks Ben! Greenbacks are the Ceramic Celestion G12, G10 and G15 speakers made basically between 1965 and 1973. They all have speaker cones made by Pulsonic, Celestion changed to other cones RIC1 in 74 and those are often referred to as Creamback. During the Pulsonic period, green magnet covers were he most common, thereby the name. Jensen is an American speaker brand (today made in Italy) Cheers