The crossover building video: kzread.info/dash/bejne/nYNmyMOopNCZo6g.html Another thing about this coupling between coils is that no filter is 100% effective - it's a slope, so there's already some low frequency signal going to the tweeter and high going to the woofer, but at a MUCH lower volume. My scope was set to 5mV per division, so the coupling when the coils are spaced as I did in my crossover is around 5mv peak to peak. And yes, this would go up as the volume goes up, but so would the regular music output from the speaker. You can help support the work I do in making these videos: Plans for sale: ibuildit.ca/plans/ Support this channel on Patreon: www.patreon.com/user?u=865843&ty=h #ibuildit #diyspeakers Did you know I have other KZread channels? My main channel: kzread.info More videos on my second woodworking channel: kzread.info My home reno channel: kzread.infoHome Website: ibuildit.ca/ Facebook: facebook.com/I-Build-It-258048014240900/ Instagram: instagram.com/i_build_it.ca/

@UberAlphaSirus

5 жыл бұрын

I would love to see more info on the transfom circuit on your sub amp. Reasearching stuff on speakers is like going on mums net.

@IBuildItScrapBin

5 жыл бұрын

Sirus - details here: sound.whsites.net/project71.htm

Thanks for being the only person on KZread to actually practically demonstrate this by putting 2 coils together. Every other video is all maths and theory.

As an electronic guy It's lovely to hear good old common sense. There is a thing called good enough, and just bacause you can mesure it, it does not mean you can hear it. Why does they sell overprised things? Because somone out there (all to many) will buy them. Love your videos John.

@stever7638

2 жыл бұрын

This was a cool video, but I think a few areas were overlooked. What happens when you start pushing 50 watts through the crossover? Also, I don't think it's completely about hearing the mutual inductance...but how the mutual inductance could alter the crossover point that the coil was setup for.

You are correct in all. Electronic technician since 40 years.

@bigpicturethinking5620

5 жыл бұрын

False. Electronics was invented in 1993 so your claim is impossible.

@marc_frank

5 жыл бұрын

@@bigpicturethinking5620 ? 😂

@alfredneumann4692

5 жыл бұрын

So i'm a ghost. :-)

@sebastienmgn2968

5 жыл бұрын

@@bigpicturethinking5620 make a google search on History of electronic engineering and you will discover than electronic have been invented over 100 years ago

An excellent reminder why some of us should not get bogged down in the details. Thank you, I need these reminders. It is difficult to train oneself to produce that mental alert, that voice that says: "Hey, you have become too deeply involved in this step of the project. You have stopped making progress. It is time to step back, look at the big picture, remind yourself of your initial vision then move on to the next step."

You never cease to amaze me. You know the technical, but you also bring the practical to the project. That's where many fail.

I’m glad you make these videos for the rest of us to help us understand the true basic understanding

Really neat. Learned about mutual inductance in physics. It's so much better to see visually. Thanks John!

Man, you have the heart of an engineer and they're the ones who got us to the moon not audiophiles.

perfection is not only unattainable but an impediment to progress

I just can't get over how nice those speakers look... just amazing design and execution

I'm not even remotely clever enough to understand any of this, so i'll just go watch the bread video again. This is my favourite of your channels though, just random stuff.

@tomgoffnett5624

4 жыл бұрын

Baking bread is its own science. If you can bake good bread you're the best kind of "scientist".

Very well put!

Good demonstration.

Words of wisdom “If it sounds good, it is good!” Thanks Professor John for the videos

Hey, John, I have to say. I noticed how clean your shop looks. It's pretty nice. Seems like that shelf of yours is working pretty well.

Loving the 'inherent vice' clip. A little Can is a nice touch for a video about audio :)

Thanks, this is what I needed to know.

Another great video.

Two thumbs up, John!

Oh my! You are going to miss all the subtle nuances in your AC/DC tunes....HAHAHA.... Just kidding John. I think you are right on point with your explanation.

How true this is John. Recorded some audio for a video on one of my other channels. The 'voice actor' I hired (for free) kept nit picking the script and how everything should be spoken. Took 5 times as long to record than is should have. I'll probably record it again with my voice so it will be right, lol.

well said

Right on....

Finally some common sense for speaker build doctrine !!

Like that, sounds good, is good...kinda like if is looks straight it is straight.... Thanks for the video.

"If it sounds good, it IS good." Truer words have not been spoken. Don't let audiophools get you down. They probably buy Monster Cables.

@sup3rbird

5 жыл бұрын

"They probably buy Monster Cables." True, and they are eager to show them to their uninformed friends and associates.

@jonperez8513

5 жыл бұрын

Hey don't be hatin' on monster cables!!

@cameronl62

5 жыл бұрын

@@jonperez8513 They work fine, but overpriced thanks to marketing wankery. Best speaker wire? Lamp cord. Last I checked, $.014/foot.

@IBuildItScrapBin

5 жыл бұрын

Not crazy about the term "marketing wankery", since people are still free to buy or not buy the speaker cables they want. More like "buyer ignorant" that allows overpriced products to sell. And then some people believe if you pay more, you get a better built product, which actually appears to be the case with the stuff that Monster sells. At the end of the day, if there's a market to be exploited, someone will do it. And the only reasonable thing to do about is is to not buy that product.

@jonperez8513

5 жыл бұрын

@@IBuildItScrapBin so I'm geekin a little bit, as John might have indirectly defended me 😁 Otherwise, I don't buy monster anymore generally speaking. The misses used to work for Best Buy. She got a discount that was 10% above whatever cost was. She got monster cables for pennies on the dollar. Generally there was at least 300% mark-up. No more discount, no more fancy cables.

great video and demonstration. that being said...using a 0.55mH instead of 0.7mH IS a big difference and will definitely mess up your frequency response in a significant, measurable way if the coil is used for example in a zobel filter to flatten some bumps

I agreed with you right up to when you mentioned pro designers using textbook formula. I know quite a few high end designers and builders. No one with any real understanding of crossover design uses or starts that way. its a waste of time because it is inherently an inaccurate method. What you have as far as layout is fine. plenty of space. To mount an inductor to stand, hot glue and a pr of zip ties work great.

@IBuildItScrapBin

5 жыл бұрын

Your comment has the needle is in the red on my my nitpick detector :)

great video, my advice is ignore the neg comments, chances are those folks never built anything in their life.

THANKS FOR THE VIDEO. THUMBS UP. JUST WONDERING WHAT GAUGE MAGNET WIRE YOU ARE USING FOR THE INDUCTORS.

Thank you for harping on this point. I love precision, I love absolute, and perfection. Reality kicks in when you do anything with real materials like metal, wood, electronics, etc, and if you are OCD over the details, you won't do anything, or it will take forever, or cost way too much, just like you said. I have to work through the reality of getting it done, and letting good enough be good enough, knowing I will get better, or it really didn't need all the obsession in the first place to be excellent.

thats was good brake bread with john

Great video once again but what was that high pitched humming noise going on in the background? Nyuk, nyuk, nyuk.

"If it sounds good it is good." NO DOUBT! All of us hear differently and have different taste. If you like the sound, it's perfect!

Agree 100% John! If it sounds good to you, that's all that matters. Unless you're an audiophile of course.................. :)

@cumhachd

5 жыл бұрын

...and it seems nothing sounds good enough to an "audiophile"

The generator may be set to 10V P=P, but did you measure it with the coil connected? Most signal generators have an op amp output and do not have a power amplifier to drive low impedance loads. I doubt it can drive 10V P-P into a crossover coil. 10V P-P into the speaker is about 8 Watts of power into an 8 ohm load. Doubt the signal generator is up to the task.

Amen

A coil that is 'standing up' is also more subject to vibration problems. And a speaker is a high-vibration environment, so securely mounting everything is a really good idea. You could always have another mounting block or something, of course, but that's more effort... Seems like turning the coil is more of an OCD "I want to do it just because" type of thing. I would certainly do it just because :)

I can hear it even when it's off... Damn tinnitus... Don't forget to wear protection protection kids, of the ear variety specially.

Hey, I totally heard that in my supersound bunker with the angelhair speakercables, your heartbeat and bloodflow overpowered it a bit, but anyway.

@jonperez8513

5 жыл бұрын

What did you do with the rest of the angel? I bet you that is a really annoying bunker hearing everything too much.

Very spiffy in black!

Beautiful room! Are you in SoCal?

Good morning sir. After watching this video with great interest and as a fellow amateur audiophile, I thought I would briefly share a speaker repair with you. Back in 1985ish I purchased some Klipsh KG4 horn loaded, poly polypropylene main drivers, with passive radiator speakers from a Military Post Exchange wile on deployment in West Germany. Up until recently, they have performed flawlessly, sound excellent and are used primary in my home theater setup in my home. However, I recently noticed a scratching (cliping) noise at certain frequencies at most volumes in one of the KG4s. I ran a sound test (30hz thru 20khz) from KZread and was able to determine the driver responsible for the noise. I removed the driver which was made from polypropylene and has an inverted (concave) butyle rubber (I think) suspension which was in like new condition. After manually moving the driver with my fingers, I detected the scratching noise. Upon closer inspection, I noticed that the wires coming from the speaker cage binding posts, where the inters the back portion of the speaker were loose. As if the adhesive had failed and the wired was dragging in the hole during vibration. The wire terminated under the voice coil cap on the other side (front) of speaker. I decided to retract the wire(s) from the rear side of the speaker cone with a pair of forceps until the slack was gently eliminated. Then, I used a toothpick and deposited a single drop of 2P-10Thick Adhesive to the wire and allowed it to flow onto the speaker cone. While still maintaining steady retraction of the wire, I sprayed a quick blast of 2P-10 Activator onto the glued area. I did this with the adjacent wire as well. After a few minutes, I reassembled the speaker and tested with both the same sound test (30hz thru 20khz) as before and various music and various home theater audio decoding formats and listening volumes. It was amazing that this repair has brought my speakers back to original sounding life again. Most certainly, I would have not be able to purchased replacement drivers for such an older model Klipsh speaker? Anyway, I thought you might be interested in this story. BTW, I am not promoting the super glue brand...it's just what I had on hand that is normally used for woodworking projects or to repair a cut finger from time to time. Klipsh KG4 fronts Klipsh SC5BK center Klipsh R5800 rears Velodyne DDP Sub (will soon be replacing with Klpish R112SW unit) Yamaha TSR 7850 Receiver Thank You Mark Nicholson Former US Army EFMB Combat Medic 1/94th FA MLRS

Insanity is good, if it's exactly the right kind of insanity.

@bigpicturethinking5620

5 жыл бұрын

I keep reminding my psychiatrists of this fact.

I dont know much about this to debate but i rotated one coil because it is free and for my ocd to stay calm. Yust for my peace of mind!

Im not an audio-enginear, but i did stay at a Holiday Inn last week

This Video was sitting in my "watch later" for way too long :)

With lower frequencies in Audio versus Radio spectrum, much higher inductance is needed. This is why iron core inductors are used to enable less required turns. Is there any electrical theory that explains why iron core inductors are hated ?

Thanks for your test theory. It is very plausible but somewhat flawed. In a active audio crossover playing music is quite different than using a tone generator that is set at a constant voltage level. In a operational speaker crossover you’re having a wide range of voltage input and output going through the crossover. And for some people who play music quite loud, that voltage can range anywhere from 2.86 V all the way up to and over 80 v. So yes you would be able to hear the difference, just my opinion. And I don’t consider this a small little thing , like you stated

@IBuildItScrapBin

3 жыл бұрын

You do realize that it's the same signal that's already going to the driver at full volume, right? It's not some other totally different signal - it's the same, just a different band of frequencies. I know you can't reliably hear that at any volume level. Assuming you can isn't the same as actually doing it.

Your crossover looks almost the same as a mid 80s crossover by my friend Radio Shack you could buy. Your finest offerings 🙁

My dog started howling!

All true. I'd add that the design is correct to 3 decimal places, but the components are only available in fixed values and "close enough has to be good enough". In addition, most use standard tolerance 10% variation parts (overall variance between units may be 20%) and, if you are buying from China, I doubt your getting better than 20% parts and 40% between units - not exactly precise.

I think you take negative comments to heart to easy . People always complain no matter how stupid it is someone has to say something . I love your videos ur voice is so soothing to me dont know why but I could listen to you all day. Keep up the good work 😀

You seem to know a lot about speakers/audio, do you have a background in it, or are you just an enthusiast perhaps? Also wondering what bands and/or genres you listen to.

@Don.Challenger

5 жыл бұрын

He's Canadian so Bieber - but really it's the day after April Fools so maybe notAn audio enthusiast yourself? maybe try a peek here - www.uhfmag.com/index.html

Should have mastered this video to only have audio on the left channel, to piss off audiofools ^^

He is not going to use those speakers to Master an album! Just let him enjoy his music ! Geez 😅

Hi John, I don't know shit about coils or electronics but next time they get onto you about being wrong ask them for their you tube channel so that you can go and see their explanation for yourself. I will guarantee that they will not have one.

I recognize Vitamin C at the end, what I have heard the movie dialog too. What was the movie ?

the reason you couldnt hear a peep is because the coil doesnt have an out put your only sending that signal into it but wheres its speaker for its output? thats why you didnt hear anything

Minor correction. As soon as you said mutual inductance, I thought 'just say transformer'... and you did. However, the concept of mutual inductance is that the inductance of a coil is not the value printed on the label, because another coil is lined up with it. The concept of a transformer is that you purposefully transmit by intertwining 2 coils. The real test is to look at the signal when the coils are 6" apart, in the same plane, and perpendicular. You did that for overlapping coils, but not for the perpendicular configuration you're ignoring. If you see little improvement there(rescaled to better measure it), then it obviously makes little difference.

Where is John the woodworker ??? What did you do to him ???

@IBuildItScrapBin

5 жыл бұрын

Try looking on my main channel. This channel was never for woodworking projects.

Just shows who is an armchair mechanic... no real world experience, but yet an expert.

7:14 pun intended? :)

Fuck dude! Stop doing that, my dog is going N U T S!!! just kidding, keep up the good work!.

Are you really chef john?

Caps are also coils that will interact….

The law of diminishing returns. When its good enough for you, why would you put more time into making it perfect by somebody else's definition?

@Don.Challenger

5 жыл бұрын

Like wine - I drink it, I don't sniff it nor spit it (unless a neighbour bottled it) leave that to the connoisseur / the cognoscenti

EVERYONE HAS TO BITCH ABOUT SOMETHING; NO MATTER HOW MINOR THE EFFECT MIGHT BE.

I want that people to show their projects, I want to see the stupidities they do and shoot them with a thousand corrections, Hehehe ! Thanks for sharing !

@Don.Challenger

5 жыл бұрын

Yes, but when you preview their channels - nada (ya, so mine is content devoid too - what do you expect I'm commenting).

Looks like ketchup. Taste like ketchup. But brother, it ain't ketchup.

11 Thumbs 👎 Butt hurt Audiophiles 🤪. Very much enjoy your Speaker building Vids , Cheers 🖖🍻👍

dat oscilloscope needs a bit of cleanin xoxo that tells me u don't often check the functions outputted by ur wooden clamps, that's just lazy and unprofessional

Audiophiles are the worst! They believe all the crap that these 'high end' companies say, and obsess over the smallest things that are basically imperceptible to even a measuring device! Also, RIP red channel :(

@IBuildItScrapBin

5 жыл бұрын

The red channel's not dead.

It might be that a lot of people feel that they need to tell you they are smart, my thinking shows their ignorance

You should be a teacher

@bigpicturethinking5620

5 жыл бұрын

He kind of is.