Talking Crossovers - Video 1 - Our Hearing | Frequency Response Graph | DIY Passive Crossover 

Thanks for the input Phillip!!

Yeah! Thanks my friend! It’s coming!!

Thank you Kurt!!

Gracias Pedro!! Ya estoy trabajando para el próximo vídeo!!!

Thanks for sharing RainMan and for watching. I’m glad you liked and subscribed!

Woohoo! That’s right.

Fala Luís! Que beleza! Haha. Bom que está por aqui. Vc mora em Houston então? Vamos com tudo! Valeu

Thanks again Tony. I’ll keep it going.

Hey Pat!! Thanks for watching!!

Hey Neil! One little quibble... the right hand rule only works for DC. On an AC circuit like a speaker the poles will be flipping back and forth in step with the signal.

@@Douglas_Blake_579 Right - at any given moment in time, the magnetic field generated by one of the frequencies in the signal will follow the Right Hand Rule. And it does reverse direction twice per AC cycle. At all the frequencies that are in the music signal at a given moment. And as you know, this is how it impedes the higher frequencies from passing through the inductor coil.

@@NeilBlanchard Yep, I do know how it works. But I don't think I've ever used the right hand rule on anything running on AC.

Haha! Right! Thanks for the input Robert!

Hey there! Thanks for watching JPA. It really is super intense haha. I’ll keep going soon.

Thanks Turbo! I’m glad you liked it.

Hey there! Yes I have to measure the drivers in the box first and get the frd and zma files, then I go to the crossover software!

Thanks Chevy!! Hope I can get back soon!

What’s up Tom?? I’m glad it’s working. Crossovers finally!

That’s right! Let’s make those speakers!

Thanks for watching!!

Thanks my friend!!!

Yeah! Thanks for watching. It’s coming soon!

Good to hear!! Thanks mate!

Thanks my friend!!

Hey John! Thanks for watching my friend!

Glad you think so! Thanks my friend.

Hey there my friend! I miss it too. I’ve been working too much but there is new stuff coming soon!!! Thanks

Resistors are simple attenuation, they exhbit a constant value at all frequencies. Capacitors are frequency dependent, their resistance lowers as frequency increases. Coils are also frequency dependent, their resistance increases as frequency increases. Pretty simple, really.

That’s right!! Doug just nailed it!

Thanks for watching JR! I hope it keeps helping.

I'm sure Bernardo plans to cover Parallel and Series crossovers in an upcoming installment. It's something best done with images... which we can't do in the comments. As for the part values in a series crossover: Taking the standard 2 way design with a woofer and tweeter in series, a coil (L) across the tweeter and a capacitor (C) across the woofer as an example... 1) Choose your crossover frequency (F) to be low enough to avoid cone breakup in the woofer but high enough that you're not putting undue stress on the tweeter. This will be determined from the specs for the drivers you are using. 2) The crossover occurs when the impedance of the capacitor (Xc) is equal to the impedance of the woofer and the impedance of the coil (Xl) is equal to the impedance of the tweeter. With 8 ohm drivers that means Xc = Xl = 8. 3) This forms two 4 ohm impedances in series still giving you 8 ohms overall. It also means that the output from the woofer and tweeter at the crossover point will be equal, but 3db less than maximum, which when summed gives you an even frequency response. 2 * pi == 6.28 for these calclulations. The Calculation for C is 1 / (6.28 * F * Xc) producing an answer in farads. Mulitiply by 1,000,000 to get MicroFarads. The calculation for L is Xl / (6.28 * F) producing an answer in henries. Multiply by 1,000,000 to get an answer in MicroHenries. So if you're shooting for a 2,000hz crossover with 8 ohm drivers... C = 1 / (6.28 * 2000 * 8) * 1,000,000 == 9.95 uf L = 8 / (6.28 X 2000) * 1,000,000 == 636 uh This of course is not "cut and dry". It is, at best, a starting point from which you can adjust values up and down to get the response you seek. To get the more complex -- massively more complex -- math that takes driver characteristics into account, you will find yourself getting far fewer headaches doing this by modelling in XSim.

Hey there mate! Sure. It’s gonna come soon. We gonna work on parallel for now but series later on.

Valeu Felipe!! Vamo com tudo!

@@sonnoradesign wtf! Brasileiro??

First, you should head into the description panel above, visit the Downloads link (We've set up a special files list for this series). Grab the the Samples file, unzip it and spend some time getting familiar with the pitch of various octaves, decades and the piano keyboard. You can also read more about this in my "What you are hearing" essay on the website link. The designer's "rule of thumb" you're looking for involves doing some pretty heavy math, manually calculating crossover frequencies, reactance and impedance to match your drivers by specifications. Not fun... let the software do it for you. The lesson plan we worked out will show you what each of the main parts does in an AC circuit in part 2. The goal has been to keep it very simple, no monster math or complex lessons in electronics. You don't actually need to know what a capacitive time constant or inductive sustain is all about to use them properly in a circuit. You really just need to understand their behaviour. (That is: it is far more helpful to know what they do than to know how they do it.) If you want to get a jump on that you can go to the downloads link install XSim (if you don't already have it) and then take Filters101. I created Filters101 as a demonstration of each of the basic filter types. With Filters101 loaded into XSim you can activate each filter separately by dragging a jumper resistor into position and observe the effects of the parts. You can also tamper with it by changing the part values and see the results immediately. That will give you about 50% of what you need to know to create a working crossover. The rest comes from knowing when and how to use each filter type.

@@Douglas_Blake_579 thanks douglas I'll dive in.

@@diyfullrangehifispeakers Best of luck with it. Crossovers are simple, blunt, devices... but even 20 years into it, I still learn new tricks all the time.

Thank you my friend! I hope o can keep adding cause it’s hard to find clear info on crossovers. Yes, not everyone has DATs so we have to go over how to start your own crossover reading schematics, or using someone else’s measurements. I’ll go over it! Thanks for the input!!

Thanks for watching!!

Thanks for the input Mike. I’ve been a little busy at work but video 2 is coming soon!! I hope haha

Fala Carlos. Sou brasileiro também! Sim, SB acoustics é muito bom, fiquei surpreso quando ouvi a primeira vez. Da uma olhada no vídeo ta Transmission Line, MLTL-6 com SB muito bom. Valeu

Olá my friend! Hahaha! Fico feliz em saber. Vou olhar sim. Sabe como é, aqui no Brasil não tem como construir nada, o governo corrupto da qui tá levando o país cada dia pior, mais imposto na importação etc... Aqui não se acha um subwoofer e twitter de qualidade com preço bom, pelo contrário má qualidade e preço exorbitante. Assim que der quero visitar um amigo na Polônia...

@@carlosameno7956eu sei bem como é. Com o dólar a 5 fica dureza mesmo. Qua do eu sai daí ainda dava para comprar falantes, dólar estava 2 para 1. Na Europa tem o Soundimports que tem todo o material que eu uso aqui. Is caras são bem legais!!!

​@@sonnoradesign obrigado! CHR Tower Speakers é top demais, ocupa menos espaço, vou tentar fazer uma, para ouvir os clássicos de Pink Floyd.

Beleza!! Qualquer dúvida me chama!!

Thanks Christian!

Hey Gerard!! How’s it going? Thanks again my friend!

@@sonnoradesign Brainstorming my new project with Morel drivers.

Wow!! Sounds like fun!

Thanks a lot my friend

Much as gracias!!

Hey Denis. E mail me at sonnoradesign@gmail.com let’s see what can we do! Hehe

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