DIY Loudspeaker building overview.
Speaker information not taught in college electronics class can be found here. They cover the basics. Here you will find tricks of the trade that require years of speaker building to learn. The "Single sided 2 way system" should have been a lab class project but wasn't. It's designed to teach the most important information in the shortest amount of time.
This compilation of loudspeaker building information and parts sellers is primarily for home speakers. If you have questions about anything I've said you can use the message the mods button to send me a private email, I will try to get you a good answer as soon as I can.
I want people to enjoy their music as much as I enjoy mine. The stockholders of speaker parts builders and sellers don't care if you ever build a good pair of speakers, they just want your money, over and over, if they can. There is a lot they can do to fool you. The gasket on most woofers is on the front side, it should be on the rear side of the basket. Yes, it makes a difference. Most capacitors are well over 250 Volts, 100 Volts sounds best. The cap makers will never tell you to not mix the voltages of caps in parallel. If you do it can ruin your speakers fidelity and you will think you made a mistake and not have a clue as to what went wrong.
There are no schools for loudspeakers like there are for violins etc. Many books are as confusing as they are helpful. This site is intended to be like a school and provide common and hard to find information, to build a working pair of above average speakers. Much of the information in the charts and graphs focuses on the information needed for solving problems before they happen, and for making better informed decisions.
My tech school spent two days of lecture on loudspeakers, they should have spent two weeks or more because there is more than enough material to learn to fill two weeks of lecture. http://www.nutshellhifi.com/library/speaker-design2.html, sheds a lot of light on how much is NOT taught to students.
Copy this link, http://goedhartvoordieren.nl/?page=r/loudspeakers/, to paste in and search the Way Back machine, (https://archive.org/web/web.php) many posts and chart links can be found there.
Add more there if you want to. I expect that the Way Back Machine will outlast Imgur and Reddit, I hope I'm wrong. Copy and paste the sidebar to a safe place for future reference, just because it is a good idea.
(12-13-18) I wish reddit didn't break the traffic counters for the 2016 election. They screwed up the one for this sub real bad. However, after about a year and a half of glitchy bar charts and accidentally showing me some numbers I usually don't get to see, Im happy to report that the daily traffic count is between 300 and 600 a day, depending on the season. Summer break is the lowest and Saturday mornings and Sunday nights are often very busy. That's a lot of speakers being built. September is a peak month as students return to school with news of what they built. Thanksgiving and Christmas break are very busy :)
Even Imgur can't count anymore. The SPL and Loudness chart had over 6000 views by the end of 2016. All the Imgur counts are way off, but the charts are good.
The following links go to charts, graphs and short essays. Click twice on the pics to get an enlarged view.
How speakers make sound: http://animagraffs.com/loudspeaker/
Single sided 2 way system
Vas and cabinet volume http://imgur.com/vwc9nsI
Liters conversion http://imgur.com/W9QrFCQ
Speaker cabinet building tips http://imgur.com/a/6oPl2
Basic Crossover schematic http://imgur.com/FmOaKCx and SPL correcting resistors schematic http://imgur.com/nElTRqy
SPL correcting resistors chart http://imgur.com/a/tD6vY
How to find SPL single resistor reducer sizes.
(L Pad calculator: http://www.apicsllc.com/apics/Misc/filter2.html)
SPL and Loudness http://imgur.com/4UyDXRW
Crossover Orders http://imgur.com/Dfy9BSW
Crossover Slopes http://imgur.com/MlOfkkf
Bessel is Better http://imgur.com/j43ZdDa
db/loudness/power graph http://imgur.com/a/guvyx
Decibels and Voltage and Power distribution http://imgur.com/Tfrqd1q
Damping http://imgur.com/0DCvJbY, see more here:http://goedhartvoordieren.nl/?page=r/loudspeakers/comments/2drc3g/new_3way_projects/
Elves Hair http://imgur.com/AINC8Hx
now called Angle Hair http://www.hificollective.co.uk/catalog/mundorf-twaron-angel-hair-wadding-p-7701.html
Amps, Ohms, Wire size http://imgur.com/Q5StmUH
Coils, pics http://imgur.com/nyjOFb1
Coil unwind chart
Coils series aiding http://imgur.com/a/JWyF1
Good frequency response looks like this
Testing your speakers http://imgur.com/OQWW6Vb
Speaker builders argue all the time
Charts are tone deaf http://imgur.com/v7V7bjB (Link: http://www.nutshellhifi.com/library/speaker-design2.html)
Loudspeakers are a flawed technology
1970 sub bass http://imgur.com/joSjAeF
Bass loss compensation circuit http://imgur.com/qjK7hsg
Someone should make these caps
My capacitor bread board
Why do caps sound so different?
Capacitor Evaporation http://imgur.com/13VCzSk
Audio Capacitor Characteristics 1 http://imgur.com/ilXAawv
Audio Capacitor Characteristics 2 http://imgur.com/pI7UPdO
Choosing Capacitors 1 http://imgur.com/TUTljSD
Choosing Capacitors 2 http://imgur.com/IHRgbZJ
Causes of Speaker Failure http://imgur.com/T8yAgD3
Crimp Connectors http://imgur.com/wmDhvbs
Speaker Drivers Parts http://imgur.com/dI0uSW3
One of Mine http://imgur.com/c1EL0ph
Everyone has my permission to copy, repost, distribute, or print to paper any of the jpegs I've posted here. Everyone has my permission to do the same with my text in the self posts.
[KLM Degler Systems, Brown Inst. '77]
Since Feb 12, 2014