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I doubt that the tumult would exhibit increase many Db over a tempest because it has almost the same efficiency and only 3db more power handling(approx) The only good part would be a light wallet and low distortion :) Personaly i find 120db rather good.Attaining this spl down to 30hz is...

http://www.diysubwoofers.org/sbc/ http://www.jlaudio.com/tutorials/magic/index.html To get the best out a driver the t/s specs must be known. Most PRO 18"s are not meant for HIFI lows and wont have high xmax. you COULD just throw it into a box of known tuning,but how it reacts ,is...

1)Its a matter of choice -15hz maynot be a priority. 2)Its a matter of response of the speaker,what happens when you tune it higher You may notice with the (for example)shiva,tempest that tuning higher produces a peak in the midbass. This is due to the t/s specifications...

Neat stuff,and heres me thinking during my DC circuits class,, BH curves,saturation, co ercive force... so boring :D I see it CAN come in handy! :emoji_thumbsup: :) FEA rocks-when people can use it :-D

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Incase u missed it in other forums.. 40hz , 143litres in volume and sounds GREAT ;) My website shows expected response http://homepages.paradise.net.nz/quadroph 8" digitor horn. im going to use the lab12 later on (hopefully in january) This was a practise one ,and i learnt an...

WAF?:D 54l is TINY the only way to get smaller,is to sacrifice something .

i know their great aye. anything but black i thought about textured paint,but dont know where to get it,its not popular il have to go searching round paint shops. ;)

Hello im about to build a basshorn. 143Litres. cutlist pic below How should i finish it externally? it will be 18mm MDF and look abit rough. im planning on similar construction techniques to this http://www.speakerplans.com/page200.html I was thinkin of something like this-...

Also, i sent u PM daniel_avr

lol,i realised we are discussing this in this guys thread,when it doesnt really concern him,so will pursue this discussion with PMs rather than thread-hog. Cheers Brian

[SIZE=2]point 1 if xmax directly was related to THD,then why is it defined by % of BL or kms not THD @ mm excursion... Does 70% BL on one woofer, and 70% BL on another,have equal THD at that point/?? point 2 www.linkwitzlab.com 'thor' subwoofer see his measurements on the subwoofer...

Hold up Woofers seem to distort differently even with similar xmaxes'' Xmax is the smaller of Xmag and Xsus, and that is where its 70% of BL or 70% of suspension linearity that speaks NOTHING directly, of what the speaker distortion output is! look at mfk-projects.com the woofers...

i designd my box with winisd pro. a mate compared it to his spreadsheets based on diysubwoofers.org spreadsheet. Very similar results. its tuned within 1hz predicted Cheers!

Dont forget,you dont HAVE to use every mm of excursion as every mm you go,will be more distortion. Also the suspension will be less linear moving further. thats if your looking for low distortion..for HT its not so critical :)

[SIZE=2]my 40hz horn is 150L for my 8" and 240L for my lab12 the 25hz horn is 120cm x 90 x 46cm (approximately) yep i know that FEA link John knows his stuff.Im glad some one did that stuff cos not everyone has the nerve to do FEA and come out alive :P The bdeap is simply a well...

are they sealed or ported or Free air?? hard to tell. id still prefer 25hz horns under the stage 110db/1watt+2kw.....probably similar output. :laugh::laugh:

You are basing your Question,on your experience,which is that your box doesnt flex while inputting alot of power(incar) my experience is,my 18mm MDF 175L box with lots of bracing in it(vertical and horizontal cross members + a big shelf port), with 10watts,flexes! can feel it easily. I...

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Oh,my website link displays as my signature below my posts,that will show the basshorns . Cheers:)

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sealed -3db at 70hz waste of time.unless you want quiet bass ported- 28L tuned to 40hz is much better! one 4in port 18in long or 50L tuned to 33hz 1x4in port 14.7inches long.. approximately. :emoji_thumbsup: :)

diysubwoofers.org for general sub informations,box types ;)

dpl12 can be used in ported box.i would prefer it ported the epb is for sealed BUT youl want PRs i dont see the port i want,fitting in its only 84db efficient also.. the DPL12 is supposed to be more cleaner,and according to mfk-projects.com too.. cheers Mike

winisd/lots of people says keep it below 5% of speed of sound- i know lots of ppl in this forum have attempted to cram in small ports into low tuned boxes,so some one will have a beter number Because my port is designed for this,i can only comfirm my jbl has very low airspeed,which isnt...

the larger the box,the more bracing needed i would expect 25mm mdf - 3/4 inch? all round, + HEAPS of bracing eg horizontal braces on the longest dimension 40cm apart, etc check out this guys bracing on his 18 double u double u double u dot geocities dot com slash adrian_mack slash...