Passive low pass RL filters

[marcjacobi]

But the 8 ohm speaker in your example, which you treat as a resistor is in fact an inductor that uses magnetism to tug on the speaker cone... Hmmmm... Also is the resistance of the speaker constant over the complete audio frequency spectrum? Hmmmm... Love the vids.

[abhijeetnayak]

Your way of explaining thinks is awesome. You should be professor in some university teaching electronics.

[Xxfadedshadows1xX]

im shit with math but i love thees vids

[legofreak55555]

thumbs up if you saw the camera at 1:31

[MASTURCHEEF001]

This is very interesting.

[willseleven1]

can you swap inductor and resistor components to filter low frequency and let through high frequency at a cut off point? similiar to the way you demonstarted on RC low pass filter video.

[Afrotechmods]

@willseleven1 yup!

[Derpinguin44]

It's been a while since I've been on the forums. I remember how much I wanted to be an electrical engineer just BECAUSE of how awesome your projects were.

On a side note, I was looking up overclocking a core 2 duo and came to your videos.

Fate, my friend.

[FussyCashew]

Great video! Thanks alto for that!

[fortyfivestudios]

i really love your videos.. they are much more entertaining than some wikipedia articles.. :P maybe you can even help me with a little problem of mine... i got a rather old alpine amp, a friend gave it to me. it makes some crazy hf noises, coming out of the amp, like from an old tv... well, he thought there might be some coils "swinging" and used some varnish to stop it... well it didnt, and now im sitting here, in need of an amp not making noises... what could be the cause? :<

[letsgetverydrunk]

my brain is cat?

[Sabockis]

2000hz low feq? thats rlly low lol

anyway great video and i love all of your videos. keep up the good work !!

[Jannto]

2khz is a tad high isnt it?

[321AUDIO]

good work 

[outwit2010]

so if I use 4 ohm speaker the cutoff point will change?

[Afrotechmods]

@outwit2010 yup

[uN1Qu3DZ]

@outwit2010 things get complicated additionally because a speaker isn't a straight resistive load and it has its own inductance (of the voice coil). So depending on the speaker, the crossover points might move around. That's why most of the time, those generic crossovers sold for "4 ohm" or "8 ohm" speakers don't work well.

There are a number of pieces of software that can accurately measure loudspeaker parameters using nothing more than your soundcard. I like audioTester myself.

[pico3423]

thanks - simple and to the point, you have the best tutorials

[myno1fakeaccount]

Great videos please keep them coming!

Also kudos for great taste in music :D

[DomChLand]

TBH I don't have any idea what he's saying but I'm still watching.

It's your voice!

[Bylga]

Thank you for making such great videos.

[nmiller03]

What song did you play with the woofer?

[B1r6m4n]

I swear you are the best teacher I've ever had...!

[leeYT321987]

Just watched the new inductor videos.

You are the man.

Thank you.

[Jhfgsjdcd]

Can u do a video on resistors ? Please

[exia78]

got it

thanks

[wow1022]

video on class d amplification?

[bkraz333]

Great series of videos!

[cyberdems]

Your tutorials are so intuitive and you make otherwise complex stuff much easier to understand by explaining it really well with good visuals. THANKS a mil =D

[V8Jagnut]

very good vids. thanks.

[Madarpok]

Why do air core inductors introduce less distortion than iron/ferrite core inductors?

[Afrotechmods]

@Madarpok Look up "magnetic hysteresis". The magnetization and demagnetization of core materials is neither linear nor 100% efficient.

[trance183]

@Afrotechmods I wish you lived near me. We would have already solved the energy crisis by replicating Thomas Henry Moray's Radiant Energy Device. :)

[BASEM434]

@Dappy666

the capacitors are measured in FARAD not in henry

[coilsinamotor]

@Dappy666 and on top of that the the eqation is L1+L2+L3+etc...=total inductence. for capacitors if you put them in seirs the capacinece is divided by the number of capacitors and thats how you got you number....

[Dappy666]

@BASEM434 Yes i know but, the pic of these two inductor looks like cap's, so i mixed up with the a cap. Also i build a low pass filter with capacitor. So, sorry for my mistake ;-)

[bigranger16]

@Arcagelinos1 because i have nooooooooo idea whats going on.

[dmxspider]

+1 for my knowledge. :D thanks

[0528203]

well just before the end i found myself thinking whats the advantage of this compared to a rc filter and then he jumps straight in with the perfect explanation

[austin777136]

God damn alphabet needs more letters

[kinsi55]

there are no annotations in this video :D

[hamiel85]

I assemble AC converters for a living and we use massive coils in the larger units. Weighing like 200+ Kg at least. :) Then again I work with the smaller units, but they are quite hefty also.

[xXdenhartXx]

Awesome, keep it up.

[DarkLevis]

Nice vid yet again, looking forward to new ones :)

[Demoman42]

DnB Yeah! :D

[Demoman42]

Hey! Thanks! ;D

[odessa999]

Great vid, you can read minds too ... Towards the end I was thinking why not just use an RC filter ...then boom ... spooky :D

Thanks for taking the time to make an upload these vid's they are very useful

[T1mmy05]

And again a very easy to understand video :D!! Thanks

[bigranger16]

i watch this and i feel stupid.

[ducttaperulestheworl]

nice

[the666bud]

liked the vid what the math formula is it 2 x 3.14 x2000

[WSPSkydiver]

Great video. Very well put together and you made it very understandable. Thanks and keep them coming!

[noname973]

LIKED



[Afrotechmods]

I love it when people click the like button before they could possibly have seen the video. Those are some dedicated fans.

[poodyplaya]

@Afrotechmods We are a dedicated audience

[Ursenfuns]

@Afrotechmods

Tend to forget it afterwards and trust in you to not publish pornographic or fascistic contents (by using illustrating cats).

[SmokeTatum]

@Afrotechmods you get used to good videos, all videos that i saw on your channel ware good so if i see that you put something new i already know i will like it. And yes, by some linked videos its so interesting that i get soo deep in watching it that its possible to forget to klick like button before switching to new part, thats another reason to klick on begin from vid. Thanx for sharing your knowledge btw.

[lucasmontec]

@Afrotechmods I'll always like your vids before seeing them. So far you made only awesome stuff!

[danielrsexton]

@Afrotechmods I liked this comment before reading it.

[TrickyNekro]

@Afrotechmods

Oh come on... It's your voice that makes the deference, it makes it sound extremely more interesting like you are ready to same a joke or something

[trance183]

@Afrotechmods haha, guilty as charged! Its because we know you won't disappoint us. :)