Air velocity 2 vent diamet 4" v length 10.1"
 User Name Stay logged in? Password
 Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read Search

 Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
 5th November 2011, 08:23 PM #1 joojoo1234   diyAudio Member   Join Date: Oct 2011 Air velocity 2 vent diamet 4" v length 10.1" What size passive would you substitute and with what xmax etc? I don't know how to calculate it or guess at it. 36.1 hz tuning Could someone tell me a method?
Ron E
diyAudio Member

Join Date: Jun 2002
Location: USA, MN
Quote:
 Originally Posted by joojoo1234 Could someone tell me a method?
Calculate Vd=Sd*Xmax for your woofer, your passive radiator should have at least twice the Vd of the woofer.
__________________
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan
Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. —Aldous Huxley

 6th November 2011, 01:48 AM #3 joojoo1234   diyAudio Member   Join Date: Oct 2011 And the box has to stay the same? I have tried modelling passives in win amp and I have not gotten a nice curve... all goofy.
Mikey p
diyAudio Member

Join Date: Feb 2004
Quote:
 I have tried modelling passives in win amp......
Must be a sub for music.

What driver are you trying to model?

 6th November 2011, 08:29 PM #5 joojoo1234   diyAudio Member   Join Date: Oct 2011 eight inch m8a hivi Newbie. What I am wanting to do is get down to 25 Hz in a enclosure around 15" 12" 20" ... using push pull. Passive radiator or transmission line or folded horn with the driver Still able to cross at 100. Doable? I cannot get a passive driver flat in winked.
 6th November 2011, 11:07 PM #6 revboden   diyAudio Member     Join Date: Feb 2011 to 25Hz with a 8" woofer with 5.8mm Xmax... What fx are you looking for at 25Hz, F12 (-12db down)?
bjorno
diyAudio Member

Join Date: Mar 2005
Location: Jacobsmountain
Quote:
 Originally Posted by joojoo1234 Newbie. What I am wanting to do is get down to 25 Hz in a enclosure around 15" 12" 20"... transmission line or folded horn with the driver..Still able to cross at 100. Doable?..
FYI:

b
Attached Images
 HiVi-M8a_TS.JPG (151.8 KB, 50 views) isobaric_2xHiVi-M8A_PE.JPG (483.8 KB, 49 views)

joojoo1234
diyAudio Member

Join Date: Oct 2011
I am not mentally disabled for the record.

Quote:
 Originally Posted by joojoo1234 Newbie. What I am wanting to do is get down to 25 Hz in a enclosure around 15" 12" 20" ... using push pull. Passive radiator or transmission line or folded horn with the driver Still able to cross at 100. Doable? I cannot get a passive driver flat in winked.
sentence punctuation... winked... ? This is what you get when you go to this forum from your cell phone... winisd...

joojoo1234
diyAudio Member

Join Date: Oct 2011
Quote:
 Originally Posted by bjorno FYI: b
Thanks! I am working at understanding it. Two questions. What programs are used here and am I seeing am Isobarik in a folded horn?
edit
Okay it is called hornresp... have downloaded it. Just so I am using my time correctly these graphs are saying it is possible?
I had thought of using Isobaric with a horn config... did not know if transmission line would be better but I guess you think not do to the size? Thanks again on the help... so many cool people on this forum.

Last edited by joojoo1234; 7th November 2011 at 03:15 AM.

joojoo1234
diyAudio Member

Join Date: Oct 2011
Quote:
 Originally Posted by revboden to 25Hz with a 8" woofer with 5.8mm Xmax... What fx are you looking for at 25Hz, F12 (-12db down)?
not sure... ? learning and ambitious... perhaps overly.

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Site     Site Announcements     Forum Problems Amplifiers     Solid State     Pass Labs     Tubes / Valves     Chip Amps     Class D     Power Supplies     Headphone Systems Source & Line     Analogue Source     Analog Line Level     Digital Source     Digital Line Level     PC Based Loudspeakers     Multi-Way     Full Range     Subwoofers     Planars & Exotics Live Sound     PA Systems     Instruments and Amps Design & Build     Parts     Equipment & Tools     Construction Tips     Software Tools General Interest     Car Audio     diyAudio.com Articles     Music     Everything Else Member Areas     Introductions     The Lounge     Clubs & Events     In Memoriam The Moving Image Commercial Sector     Swap Meet     Group Buys     The diyAudio Store     Vendor Forums         Vendor's Bazaar         Sonic Craft         Apex Jr         Audio Sector         Acoustic Fun         Chipamp         DIY HiFi Supply         Elekit         Elektor         Mains Cables R Us         Parts Connexion         Planet 10 hifi         Quanghao Audio Design         Siliconray Online Electronics Store         Tubelab     Manufacturers         AKSA         Audio Poutine         Musicaltech         Holton Precision Audio         CSS         Dx Classic Amplifiers         exaDevices         Feastrex         GedLee         Head 'n' HiFi - Walter         Heatsink USA         miniDSP         SITO Audio         Twin Audio         Twisted Pear         Wild Burro Audio

 Similar Threads Thread Thread Starter Forum Replies Last Post Richard Ellis Headphone Systems 3 11th November 2012 09:27 AM dtm1962 Swap Meet 0 15th January 2010 04:38 PM freddi Multi-Way 0 21st January 2007 06:56 PM

 New To Site? Need Help?

All times are GMT. The time now is 07:34 PM.

 Home - Contact Us - Advertise - Rules - diyAudio Store - Sponsors - Privacy Statement - Terms of Service - Top - Opt-out policy

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.