Drivers and their enclosures
Printed From: Speakerplans.com
Category: Plans
Forum Name: Scoops
Forum Description: One scoop or two ;-)
URL: https://forum.speakerplans.com/forum_posts.asp?TID=97544
Printed Date: 20 April 2024 at 1:58am
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: Drivers and their enclosures
Posted By: George1234
Subject: Drivers and their enclosures
Date Posted: 16 January 2017 at 5:15pm
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If I have a 6" sub how do I work out the size and type of enclosure to build for it? I aim to build a mini system for my room, If anyone can help, would be greatly appreciated!
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Replies:
Posted By: luton_soundman
Date Posted: 16 January 2017 at 5:16pm
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By the individual driver parameters ------------- Sound Hire/Sales new/used equipment. |
Posted By: George1234
Date Posted: 16 January 2017 at 5:18pm
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I'm new to understanding drivers - which parameters would I need to be looking at? |
Posted By: George1234
Date Posted: 16 January 2017 at 5:22pm
| What sort of parameters should I be looking at? |
Posted By: Dub Specialist Sound
Date Posted: 16 January 2017 at 7:08pm
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all of them t/s prams of drivers/spec ect ------------- Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE... |
Posted By: odc04r
Date Posted: 16 January 2017 at 10:18pm
You've got a lot to learn! Start here - http://speakerplans.com/index.php?id=faq1" rel="nofollow - http://speakerplans.com/index.php?id=faq1 What is the make/model of the driver you have already? |
George1234 wrote:Posted By: George1234
Date Posted: 16 January 2017 at 10:30pm
| I have none yet, im just thinking of building a small system - is there a way of building a horn loaded cabinet to fit a 6/9" sub? |
Posted By: Mark James
Date Posted: 17 January 2017 at 7:51am
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the problem with horns is that for it to run bass frequencies it needs a long enough horn and a big enough mouth, so unless you want to use a stack of like 12/16 horns then there is no point. and i dont particularly think you want 12+ cabs in your bedroom? [actualy if i had a big enough bedroom,..... actualy no id still rather just have 4 18s tbh but i still wouldnt use that in my room] theres a 6" tapped horn tham6 i think its called might do what you want, might be better just to have a sensible reflex cab tho... horns are realy designed for a specific job, using them outside of that is like trying to do the paris dakar rally in a formula one car ------------- me so horny me love you long throw horn loaded for her pleasure |
Posted By: Mark James
Date Posted: 17 January 2017 at 8:14am
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wont let me edit, but the tapped horn will work as a single unit unlike most horns which need big[ish] stacks ------------- me so horny me love you long throw horn loaded for her pleasure |
Posted By: _Natty_
Date Posted: 17 January 2017 at 9:18am
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the result of a micro scoop for a micro driver is strictly for fashion and looking pourpose, i tried a couple of 5" speakers for a friend... they cant go down in no way... but the result is not so bad... theory some times can be forget and choose by your hears. my suggestion is to forget about how accurate is the scoop enclosure and find a decent driver as suggested by others looking to the ts params... keep in mind that so little transducer can't be compared to the standard big boys
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Posted By: odc04r
Date Posted: 17 January 2017 at 9:36am
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Your only hope for a 6" driver and low frequencies is a bandpass or reflex assisted enclosure unfortunately. And it won't be any old 6" driver for decent results. The bandpass might give you some rumble but not much else. Your best bet with a 6" driver is to build a pair of floorstander or bookshelf speakers. Might be a bit more HiFi looking than PA but that's the world that 6" drivers come from generally. Generally due to the way 6" drivers are made for PA you are going to struggle to get anything lower then 60Hz out of them and the power you cab give will be limited. As long as you realise that then build anything for practice and looks. It's all good woodwork practice. |
Posted By: George1234
Date Posted: 17 January 2017 at 2:58pm
| Thanks very much! So I should start looking at small systems, like a Hifi system to get started with? Is it possible to use 12" drivers or higher? Or does it all depend on the t/s parameters? |
Posted By: odc04r
Date Posted: 18 January 2017 at 11:04am
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Well the same principles apply, HiFi guys tend to be less about maximum SPL and more into other exotic details of designing enclosures but the fundamentals are the same. T/S parameters are very useful for modelling a system at small signal levels, where driver and magnetic gap behavior remains linear. They are also most useful for under ~400Hz modelling although can be extended higher if you are more careful. Under there you can generally assume the wavelength of sound is much larger than your cabinet dimensions and so doesn't interact with it much in terms of resonance. They will not predict large signal effects so well necessarily, and they can't really tell you anything about the particular way some drivers sound compared to each others. There is also a statistical distribution of parameters over drivers due to manufacturing tolerances and that parts of them will loosen up slowly over time as they are used. So in summary, they are massively better then nothing at all and allow you to get within 90% of your design goals I'd say. But at some point you need to build a prototype, account for real world effects + adjust, then perhaps build a better mk2 model with what you have learned. |
Posted By: George1234
Date Posted: 18 January 2017 at 12:37pm
| In terms of parameters, surely the designs for a full scale rig can be scaled down to suit any size of driver? |
Posted By: DMorison
Date Posted: 18 January 2017 at 12:50pm
Not in all cases, no. Some of the ways in which cabinet design features affect the sound are based on the wavelength of the sounds you want to reproduce, as well as the drivers used - horns in particular are very dependant on wavelength related principles. So if you want a horn to go down to 40Hz, it has to have a minimum path length and mouth area, regardless of whether you put a 5" hifi driver at the start of it or a 21" PA sub. (There are slight exceptions based on sub-types of horns etc (eg tapped horns are less dependant on mouth area) and acoustic environment, but you don't want to start learning to design by relying on exceptions, you're better to learn the fundamentals first.) HTH, David.
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Posted By: George1234
Date Posted: 18 January 2017 at 1:01pm
| Ah okay, Im very interested in all of this - having only started looking to what actually goes into a speaker, I dont know what these fundamentals are, can you help? |
Posted By: odc04r
Date Posted: 18 January 2017 at 6:17pm
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If you really want to learn fundamentals your best bet is to buy some second hand textbooks and read 'em! The internet is a great resource but sometimes nothing beats an actual book. If you are good enough at maths to understand complex numbers then get 'The fundamentals of acoustics' by Berenak. Otherwise look for something a little less technical. |
Posted By: fat_brstd
Date Posted: 18 January 2017 at 11:29pm
This one? - https://en.wikibooks.org/wiki/Acoustics/Fundamentals_of_Acoustics" rel="nofollow - https://en.wikibooks.org/wiki/Acoustics/Fundamentals_of_Acoustics ------------- Melbournes Rootical Warrior Roots - Dub - Steppers http://www.facebook.com/adrians.wall" rel="nofollow - facebook page |
Posted By: DMorison
Date Posted: 19 January 2017 at 12:44pm
This is much more basic, and a little dated, but very easy to digest: https://www.amazon.co.uk/Introduction-Loudspeakers-Enclosure-Design-BP/dp/0859342018" rel="nofollow - - https://www.amazon.co.uk/Introduction-Loudspeakers-Enclosure-Design-BP/dp/0859342018 Vance Dickason's "Loudspeaker Design
Cookbook" (on about its 73rd edition by now I think) would be a little more
intermediate, but doesn't cover Horns. For more specific stuff about horns design, you
might try some of the articles here: http://www.quarter-wave.com/Horns/Horn_Theory.html" rel="nofollow - - http://www.quarter-wave.com/Horns/Horn_Theory.html or
this one: https://www.grc.com/acoustics/an-introduction-to-horn-theory.pdf" rel="nofollow - - https://www.grc.com/acoustics/an-introduction-to-horn-theory.pdf HTH, David. Edit - correct attribution /
spelling |
Posted By: DMorison
Date Posted: 19 January 2017 at 12:47pm
Little bit bigger than that I think: https://www.amazon.co.uk/Acoustics-Leo-L-Beranek/dp/088318494X" rel="nofollow - https://www.amazon.co.uk/Acoustics-Leo-L-Beranek/dp/088318494X Edit: un-buggered quotes
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Posted By: odc04r
Date Posted: 19 January 2017 at 1:14pm
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Yeah, that's the badboy. Good shout on the loudspeaker cookbook too, that's a little more digestible without spending hours. |
Posted By: George1234
Date Posted: 19 January 2017 at 1:32pm
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Safe! Cheers for the help - I'll keep everything posted, and ask for help accordingly! |