DIY Speaker Driver Tutorial (Aperiodic 3-way Loudspeaker from Scratch)
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- เผยแพร่เมื่อ 1 ธ.ค. 2020
- In this video, I show the process of making good sounding DIY speaker drivers. I also make aperiodic enclosures for the drivers. I got inspiration from this video:
Home Made Speaker Driver - Sorin, DIY electrical nerd
• Home Made Speaker Driver
I only wanted to pay a little bit more attention to the quality of the parts and materials. However, you may want to watch that video also, to get a better idea how to do some of the steps.
I made most of the parts myself, but the spider and the surround were bought from GS-Audio (link below). They offer a lot of different speaker driver parts.
The metal parts for the magnetic structure are somewhat hard to find. It may of course depend on where you live. However, most shops only sell that stuff in large quantities. If you can tolerate some imperfection, you may want to check out s355 structural steel. It has somewhat sufficient permeability and magnetic saturation. Some companies cut steel pipes and steel bars, and ship them even in large quantities.
If you have any question about building a speaker driver (or an aperiodic enclosure), feel free to ask in the comments. There's a lot of information I didn't include in the video, because I wanted to keep it easy to follow.
Warning! if you try making a good speaker driver at home, don't be surprised if it gets expensive. If you want to reduce the costs, you will have to make a compromise with the quality of the design and the materials.
Some useful links:
Software for designing magnet structures:
www.femm.info/wiki/HomePage
Speaker driver parts and kits:
www.gsaudio.it/
Software for enclosure and crossover design:
kimmosaunisto.net/Software/So...
Software for frequency response and impedance measurements
www.roomeqwizard.com/
Like and subscribe if you enjoyed this video. I mostly upload my own songs, but every now and then, I also make DIY-videos. - วิทยาศาสตร์และเทคโนโลยี
How can this only have 7.7K views? This is one of the best, most informative videos I have ever seen, with superb results. Congratulations!!!
Now we can make speaker enclosure by using bowls made IKEA furniture. RIP B&W Nautilus. Congratulations for making such a wonderful speaker and thanks for sharing it.
Great stuff mate. Very satisfying making them and then listening.
Been making drivers/speakers myself for a while now, so nice to see someone else at it too.
Thanks for sharing. Have fun !
The case when the head is friends with the hands.,👍💪🛠️
Great job.
Great job
awesome!
Very impressive stuff. I was thinking of making a coaxial driver with a horn tweeter in the middle just the like the old EV and University stuff from the 1960s. By the way, when positioning the voice coil and spider, why not just use plastic shims to keep equal distance the whole way around. If you watch a speaker recone tutorial, you will know what i’m talking about. 👍
Sounds like an interesting project. Just tell me if you end up making any video or documentation about it, it would be interesting to see 😀.
I know the voice coil aligning method and I actually tried it too. But I wanted to be sure that the outer surface won't rub. With the plastic strips, I only see the inner surface of the former. And as I know that the coil gap isn't perfect either, I'm not yet satisfied with the information that the former is centered compared to the pole piece. Do you understand what I mean?
@@olijomusic2481 Yes i see what you are talking about. Thanks for explaining.
nice bro
Nice!
Good
This is pretty impressive. Do you have T/S params and FR/Impedence plots of the drivers?
Yes, I made the impedance rig to measure the T/S parameters and the impedance. Actually, that was why I ended up making it aperiodic, as the woofer Qts very high. The aperiodic design kind of damps the cone movement, as it forces the air to move in and out through a resistive vent.
I also took some not very accurate FR measurements of the drivers using my USB mic. The measurements were not that accurate, but they helped me to find the cone break-up frequencies, and to design the crossover network.
Cool! Was the subwoofer enclosure aperiodic as well? Also what are the crossover frequencies?
I did not make any subwoofer, but the woofer and midrange enclosures are both aperiodic. Crossover frequencies are 800 Hz and 3800 Hz. Maybe I should make a subwoofer too 🤔. It may only be hard to handle the large magnets.
I want to make a small subwoofer box for my peerless XLS 10 using aperiodic box can u suggest how to
👍👍Top ! 👍👍
Very good job! Congratulations!
Could you direct me to any website, pdf or even books on how to calculate and build speakers like you did?
Thanks.
There's not very much information about DIY speaker drivers in the internet. But by reading about how they are made in factories, you can find your own ways to do it. It's pretty hard to calculate beforehands how the driver will act. But there's some software that can be used to model the system, if you know the parameters for all the parts you use (like material, elastic modulus, density, magnetic properties etc). The magnet structure can be modeled with a software called FEMM. I have also used COMSOL Multiphysics in school projects to model speaker drivers, but that's quite compilcated too, especially if you don't know the properties of all your materials.
When I made those drivers, I didn't do any computer modeling beforehands (i thought it would be too hard and time consuming). I only measured the impedance afterwards with a simple impedance rig, using softwares like REW and ARTA/LIMP. Then I used the measurement data to calculate Thiele-Small parameters for the driver. Based on those parameters, I chose the enclosure type. My drivers had high total Q-value (which means something like very low damping), so decided to make aperiodic enclosures, to balance the damping of the drivers a little better. Also, I wanted the enclosure to be somewhat compact, so an aperiodic enclosure was good for that, because it allows smaller cabinet size. Here's some information about aperiodic speakers diyaudioprojects.com/Technical/Aperiodic/
If you want to know about the physics behind speakers and speaker drivers in general you can check these books:
www.sciencedirect.com/book/9780123914217/acoustics-sound-fields-and-transducers
www.amazon.com/Loudspeaker-Headphone-Handbook-Third-Borwick/dp/0240515781
However, those books, probably do not include any DIY tips.
Also
www.diyaudio.com/
Is good place to discuss all the technical details of DIY speaker projects
There's also some useful links in the description that I can recommend.
@@olijomusic2481 Thank very very much!
how did you make crossover for the speakers
I actually just used some crossover calculator from the internet. I know that if I desingned the crossover myself with some software tools, I could get even better results, but at that point of the project, I was quite exhausted already, as there was a lot of work in the drivers and the enclosure already.
The crossovers are external, as I didn't want to put them inside the enclosures, as they are tricky to open in case of any error. In addition to the crossovers, I made an analog filter around 100 something Hz to tackle the one worst resonant frequency of the enclosure.
Dimension bowl sir thanks
www.ikea.com/us/en/p/blanda-matt-serving-bowl-bamboo-60214343/
These are the wooden bowls I used.