scooter99 Posted February 4, 2015 Report Share Posted February 4, 2015 First things first, N8, I had this started in the General Section, and then thought that since I was talking about subwoofers, I might put it in the Subwoofers and Enclosures section. Hopefully that was correct. If not, my appologiez. So as the title says, I'm trying to boost my knowledge about subwoofers (no pun inteneded). Is there somewhere that someone has done an extensive explination on how the subwoofer actually works? I've looked around in here and there is some information, but not a lot of it on this subject as a whole. In here anyway. What do I mean? I'd love to know all the parts of a subwoofer, easy enough to look up I suppose. But how do the parts all intertwine to make the uber sexiness we know as bass? Cones, and dustcaps, and formers and windings, and ohms, and all that stuff. How does one effect the other and what specifies which sub would be better in a sealed vs a ported, or bandpass enclosure. What are the basic understandings of Thiele-Small Parameters? I know there are a bunch of them, but how does one read them to understand why the sub does what it does? How are Thiele-Small Parameters determined and why are they different between different brands? Why would a 4" coil be better than a 3" coil or a 2.5" coil, etc? Is it as simple as power handling? Or is there more to it than that? I'd like to know all of this to get a better understanding of the subwoofer so I can try and better understand "the chase" that we all love to follow. I'm going to do my own research of course, but my hope is that some of you out there that really do understand the way a subwoofer works, might help those of us out there that don't understand it by explaining it as completley and as much in basic terms as possible. For instnace - "This is the (blank) and it is responsible for the (blank) and the differenece in size (if applicable) is this." Make sense? I'll post up some links of what I find that might be of some help. Here's my disclaimer: You all know me by now, you know I'm a very inquizative person. I ask questions. If you tell me oh it's does this, but don't explain why, I'm going to ask you why and for more elaboration on your answer. I'm not being a dick, I'm not calling you out, I just really want to understand it and i would love for there to be a good explination for someone who comes on here to learn and sees this and says "damn I get it now" after reading it. So if I ask you, and you don't know, just say, "I don't know it was just my understanding from when I was told", or simply "I don't know", and hopefully someone on here can pick up and answer why it is what it is for you. See, then we all learn something! Ok enough talking from me now. I'm off to do some research. Facebook Page: S99Creations 2006 F250 Lariat Build Link to comment Share on other sites More sharing options...
scooter99 Posted February 4, 2015 Author Report Share Posted February 4, 2015 I'm reading up on this link right now. Seems to be very informative. http://education.lenardaudio.com/en/05_speakers.html Facebook Page: S99Creations 2006 F250 Lariat Build Link to comment Share on other sites More sharing options...
n8ball2013 Posted February 4, 2015 Report Share Posted February 4, 2015 I got to the part where you almost posted in general audio and glossed over THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
never knows best Posted February 4, 2015 Report Share Posted February 4, 2015 good site for basics- http://www.bcae1.com/ Link to comment Share on other sites More sharing options...
never knows best Posted February 4, 2015 Report Share Posted February 4, 2015 also more good info here- http://www.termpro.com/asp/pubs.asp?Category=2&Org_ID_Filter=0&Year_Filter=0 Link to comment Share on other sites More sharing options...
scooter99 Posted February 4, 2015 Author Report Share Posted February 4, 2015 I love reading something informative from someone who likes to throw in a little comedy!! This is from that link above I posted, and he's talking about the gap and voice coil and vibrations etc. "Hopefully the voice coil has been perfectly centred in the gap. The clearances are very very small, less than half a bees dick." Made me laugh. Facebook Page: S99Creations 2006 F250 Lariat Build Link to comment Share on other sites More sharing options...
Krakin Posted February 5, 2015 Report Share Posted February 5, 2015 I highly recommend reading up on AC circuits in this book. http://www.ibiblio.org/kuphaldt/electricCircuits/AC/AC.pdf And if you need some background you might want to start with the DC Circuits book. http://www.ibiblio.org/kuphaldt/electricCircuits/DC/DC.pdf This site has a lot of great stuff. http://www.subwoofer-builder.com/ http://www.silcom.com/~aludwig/ https://sites.google.com/site/amateuraudio/theory/compression One of the best sites I use. http://sound.westhost.com/articles.htm With this specifically dealing with T/S Parameters. http://sound.westhost.com/tsp.htm Have fun with the Germans. http://www.hifi-online.net/ http://www.physicsclassroom.com/class/sound/Lesson-5/Resonance One big ass book on Helmholtz Resonators (ported enclosures) https://books.google.com/books/reader?id=Xy4DAAAAQAAJ&printsec=frontcover&output=reader&pg=GBS.PA46 Small acoustics lessons http://www.trueaudio.com/st_spcs1.htm http://www.sonicdesign.se/optimum.html Best site I have for acoustic lessons and speaker lessons. http://www.linkwitzlab.com/publications.htm JBL Document http://www.pispeakers.com/ssdm_99.pdf Pi Speaker's Documents http://www.pispeakers.com/Speaker_Crossover.pdf http://www.pispeakers.com/Speaker_Crossover_Lab.pdf More Speaker Stuff http://www.stonessoundstudio.com.au/stone/diy_speaker_info/diy_introduction_p1.htm Diaphragm Materials Somewhat Explained http://www.stonessoundstudio.com.au/stone/diy_speaker_info/diy_driver_types_p3.htm Absorption coefficients of common building materials and finishes http://www.stonessoundstudio.com.au/stone/speaker_enclsoure_box_materials.htm Physco-Acoustics http://www.avforums.com/threads/sub-psychology.661795/ For the most detail about eddy currents in general: http://en.wikipedia.org/wiki/Eddy_current]http://en.wikipedia.org/wiki/Eddy_current]http://en.wikipedia.org/wiki/Eddy_current For the most detail about EMF: http://en.wikipedia.org/wiki/Electromotive_force]http://en.wikipedia.org/wiki/Electromotive_force]http://en.wikipedia.org/wiki/Electromotive_force Back EMF: http://en.wikipedia.org/wiki/Counter-electromotive_force]http://en.wikipedia.org/wiki/Counter-electromotive_force]http://en.wikipedia.org/wiki/Counter-electromotive_force The rest of these will be those and other things like impedance but in specific application: basic explanation and equations: http://physics.bu.edu/~duffy/py106/Electricgenerators.html]http://physics.bu.edu/~duffy/py106/Electricgenerators.html]http://physics.bu.edu/~duffy/py106/Electricgenerators.html More very basic explanations: http://www.prestonelectronics.com/audio/Impedance.htm]http://www.prestonelectronics.com/audio/Impedance.htm]http://www.prestonelectronics.com/audio/Impedance.htm This is a forum, but the guy answering knows his stuff so just double check anything you read but aren't sure about: http://physics.bu.edu/~duffy/py106/Electricgenerators.html]http://physics.bu.edu/~duffy/py106/Electricgenerators.html]http://physics.bu.edu/~duffy/py106/Electricgenerators.html https://www.boundless.com/physics/induction-ac-circuits-and-electrical-technologies/magnetic-flux-induction-and-faraday-s-law/back-emf-eddy-currents-and-magnetic-damping/]https://www.boundless.com/physics/induction-ac-circuits-and-electrical-technologies/magnetic-flux-induction-and-faraday-s-law/back-emf-eddy-currents-and-magnetic-damping/]https://www.boundless.com/physics/induction-ac-circuits-and-electrical-technologies/magnetic-flux-induction-and-faraday-s-law/back-emf-eddy-currents-and-magnetic-damping/ http://www.caraudiohelp.com/newsletter/speaker_impedance.htm]http://www.caraudiohelp.com/newsletter/speaker_impedance.htm]http://www.caraudiohelp.com/newsletter/speaker_impedance.htm http://sound.westhost.com/project56.htm]http://sound.westhost.com/project56.htm]http://sound.westhost.com/project56.htm http://sound.westhost.com/patd.htm]http://sound.westhost.com/patd.htm]http://sound.westhost.com/patd.htm http://en.wikipedia.org/wiki/Electrical_characteristics_of_dynamic_loudspeakers]http://en.wikipedia.org/wiki/Electrical_characteristics_of_dynamic_loudspeakers]http://en.wikipedia.org/wiki/Electrical_characteristics_of_dynamic_loudspeakers http://www.churchsoundcheck.com/imp1.html]http://www.churchsoundcheck.com/imp1.html]http://www.churchsoundcheck.com/imp1.html For your goals about designing, here are your 2 new best friends. http://sound.westhost.com/tsp.htm]http://sound.westhost.com/tsp.htm]http://sound.westhost.com/tsp.htm http://www.diy-audio.narod.ru/litr/FaradayRingsVoiceCoilImpedance.pdf]http://www.diy-audio.narod.ru/litr/FaradayRingsVoiceCoilImpedance.pdf]http://www.diy-audio.narod.ru/litr/FaradayRingsVoiceCoilImpedance.pdf A GREAT Book that is used by many Universities around the world. http://www.avatar.com.au/courses/PPofM/ Some more explaining boxes http://www.hometheaterhifi.com/volume_5_2/cmilleressayporting.html http://www.troelsgravesen.dk/vent_tuning.htm Transmission lines. http://www.t-linespeakers.org/design/MJK-for-dummies/index.html And the Handbook of OP-Amps. http://www.ti.com/lit/an/sboa092a/sboa092a.pdf Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
scooter99 Posted February 5, 2015 Author Report Share Posted February 5, 2015 Damn son!! That's kick ass!! Thanks! Hang on, let me grab my glasses and I'll get to work! Thanks Krakin! Facebook Page: S99Creations 2006 F250 Lariat Build Link to comment Share on other sites More sharing options...
Krakin Posted February 5, 2015 Report Share Posted February 5, 2015 I kind of forgot if I linked some stuff and didn't want to double post any so I may have left a few out of my list. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
scooter99 Posted February 5, 2015 Author Report Share Posted February 5, 2015 Well this is great. It's appreciated. Thank you. Facebook Page: S99Creations 2006 F250 Lariat Build Link to comment Share on other sites More sharing options...
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