RC Low Pass Filter Explained (with Speaker Example)

In this video, I go over the concept of RC low pass filters. This includes the theory as well as the application. I go through the basic RC low pass filter circuit design, and go into detail about the components such as the capacitor and the resistor. I put the theory to the test by wiring up the filter to a speaker and an audio source. Hopefully, you have enjoyed the video! If you enjoy these types of videos then let me know! There is also more engineering videos on my channel already, so be sure to check those out too! :)

**MUSIC**
Licensed under Creative Commons: By Attribution 3.0

[thecaderatcliff]

Thank you so much man. I spent a long time trying to get a visual understanding of how an RC LPF worked, and this cleared it up immediately. Really appreciate it.

[morgenfeldhahn]

Thank you this is so helpful! I've been looking everywhere but couldn't find a straightforward explanation of what is actually going on at each step. This was so clear and made so much sense

[atsa]

Thank you. Simple and very clear explanation. Now i get it clear as sound.

[Nikhilkunjathaya]

I can understand that there was demonstration mistake
But the explanation was really cool for explaining "what if I do like this" solved my doubts.
You recieved a sub 💙

[powerofyes]

That was the best explanation I've ever seen

[kaneater]

Nice Alex... I really liked your way of explanation and representation

[jlev]

Intro is the best ever! Great video. Keep it up.

[omarceentayyab]

@4:05 Thanks for that! Dudee! great video!

[evanjalinmarshal]

Tq so much sir....this vedio helped me a lot to understand this to the point explantion without any stories

[Point_breaker_]

This is the explanation for filter in yt 🎉

[alexjbeezy]

Yeah, there is an error in this video when it comes to the speaker demonstration. The RC filter is preassumed that there is no load at the output. So when I hooked up the 8 ohm speaker, that is a low impedance device, so it would have affected the cutoff frequency. What I should have done was put a buffer (op amp or voltage follower) between the filter and speaker to get that high impedance that the model shows. The theory is correct; the application is wrong. I'm also dumb.

[williamnichols]

I built a simple double filter. With two pots @ 50Kohm and two 47Mfd caps in both the lpf and hpf configs. I have a line level output from whatever going into that, then going to a vacuum tube amp that I also built for the mids/highs from the hpf. Then the other to a powered ss subwoofer. Its mono with the stereo channels together. I can tweak how much treble and bass gets split. The tube amp is just a small 6at6 and 6v6 mono amp. Im impressed! Someday ill build a stereo version of this in a proper cabinet. Or if I'm really brave, a push pull stereo amp.

[dont.ripfuller]

Oh cool, black magic, thanks for sharing

[tylergreen]

one thing that also confuses me...the node you speak of. is it an electrical component? does current just not go to the capacitor at all? what happens right there? I read path of least resistance is a myth. This is still by far the best explanation on youtube

[tamanampudiamarsainathredd]

Thanks for this Video.
Can you provide me the software which you are using to drive the sound and info related to that?

[oldguyjammin]

I have an Egnater tube amp for guitars that is a little Bass Weak. It has a 3 band EQ but even with the bass cranked it’s weak. I thought I might get in there an change out the capacitor in the bass EQ section for one that is double in value... is that right? Or should it be halved :)

[zastavaskala]

Do i put rc filter on output of amplifier or input ?Thanks, great video.

[basserex]

Hello! i have this problem in my car audio. This ripple current is going to my only one amp (7200watts), how to solve this problem? thanks!

[mufflerbearingR]

What size of resistor would i use if i wanted to make a low watt sub woofer? Could you lay out the wire diagram on how that would look?Asking for a friend. :)

[onythebst]

Should the impedance rating of the speaker driver be taken into consideration with the frequency cutoff calculations? Does the speaker’s impedance become the resistor?