Subwoofers (and the air itself!) are NOT in-phase with your mixer and amplifier.

You've gotta be one of the most passionate, most interested, most curious, and smartest people in audio on the Internet right now.

You are the only one in the web teaching actual science with audio engineering. Things most audio “engineers” have no clue about. Thank you

If you have a solid understanding of kinematics and fourier transforms it makes this stuff easier to grasp, but that is honestly more esoteric than what most people need to actually apply this in practice. This is BY FAR one of the best intuitive explanations of how phase works with sound reinforcement that I have ever come across. It's something I've understood but always had a hard time explaining in detail because it's such a math heavy topic to really get in to. Great job bridging that gap! Would love to see more.

For the first time ever, I finally understand the affects that phase response has on a system because of this demo. Thank you!

This is now one of my favourite videos on tech. It's just... the applied sound engineering and exploration, I had to rewatch it to gain insight

An insane amount of useful information and I’m all here for it! The visualizations are super helpful too, thank you so much for the effort!

Most educational half hour I've spent in a long time. Awesome. Thanks!

Love it, this reminds me greatly of my electrical engineering classes at uni. You're like connecting all the dots when it comes to audio applications

Amazing! Amazing amazing. This is the kind of content I've always wished existed. Now we just need a pipeline for absolute beginners to get to this point

I believe there's a term called Jerk when decribes the rate of cahnge of acceleration. Also wonder how damping factor and power bandwidth comes into play. Awesome video, thanks!

Great video. I really like how you've taken something that can very dry, mathematical and abstract and make it understandable in an intuitive way

That was one of the best descriptions I've ever seen for the behaviors of the "signal, driver, soundwave, mic" relationship. It's a very complicated process, and this is a great way to break it down and understand each component. For your next challenge, you should try to do the same type of breakdown for a bass-reflex cabinet. That is one of the most important and least understood elements of speaker/cabinet design. I've been struggling to wrap my head around it for ages.

nothing is in phase my friend

I totally love the detailed technical explanation. Fantastic video. Little brain numb (in a good way) after watching it with high focus. I learned quite a lot from this video. Thanks for the great work! I really didn't expect to get info on both the advanced electronics I expected, but on fluid dynamics as well. I never thought about that before, but it really does make sense having to factor air pressure, displacement etc. And that's all Fluid Dynamics/Mechanics. Totally awesome.

This must be one of the most beautiful videos I have seen. I watched it 3 times already and will keep doing it. It explains so much and rises so many new questions...

That's an incredibly inciteful tutorial. I had no idea how much went in in the journey of music through my sound system! Terrific demonstration!

In the near-field of a dipole, which is where you're measuring with your microphone, the pressure and the velocity are 180 degrees out of phase. The driver cone determines the air velocity and the microphone picks up the pressure field. That's where your phase shift at 14:00 comes from.

Hands down the best video I've seen describing audio phase relationships both in thoroughness and in critical thinking. I can only hope for more people to enjoy this!

I look at those Yamaha Dante interfaces everyday,This a great video. Great channel

The animation 24 minutes in was such an awesome lightbulb moment, thank you!! Epically useful video!