Sub design software ? - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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
Reply
 
Thread Tools Search this Thread
Old 15th June 2006, 10:30 PM   #11
diyAudio Member
 
Join Date: Jun 2006
downloaded it, but caint get it to work...
and it doenst have DAYTON speakers in it at all....whats up with that ?

Acording to my volume stated by factory, what diminsions does the bow need to be
  Reply With Quote
Old 16th June 2006, 02:04 AM   #12
diyAudio Member
 
roger_lew's Avatar
 
Join Date: Nov 2005
Location: Moscow, ID
Are you planning on building the 2 cubic foot vented box specified in your first post? For the MA driver? Are you thinking Dayton now (winisd lists them under DLS by the way)?


Well if you are building the vented box for the MA you just need to make sure the internal volume of your box is 2 cubic feet + the volume of your two ports (3"d x 15.5") + the volume of your plate amp(s) + the volume displaced by the speaker + the volume of your internal bracing.


This is how I would do it quickly.

1. Calculate port volume
Assuming you use .25" pvc pipe each of your ports are roughly 150 cubic inches each (pi*1.75*15.5, 1.75 opposed to 1.5 to account for .25 inch wall thickness).

2. Calculate the volume displaced by your plate amp.
Lets just assume 35 in^3.

3. Calculate (guesstimate) volume displaced by speaker
Let's assume 50 in^3

4. Calculate (guesstimate) volume displaced by bracing
Let's assume 300 in^3 (20" x 20" x .75")

4. Add up these volumes
Then you add up these measurements 2*12^3 (2 cubic feet) + 150*2 (for both ports) + 35 (plate amp) + 50 (speaker) + 300 (bracing)
... and you get 4141 in^3 (2.4 ft^3)

5. Find box dimensions with appropriate internal volume
You might have a depth, width, or height consideration that you need to abide by, but I am going to calculate a cube b/c it is easy and efficient by taking the cubed root of 4141 which is roughly 16 inches. The exact dimensions don't really matter (assuming they are not wildy disproportional) as long as the internal volume remains close to what you need.

Note: If you have 1" walls your port ends up being 1.5" from the rear wall, which might be to close for some but this is purely hypothetical.


Does that help at all?
  Reply With Quote
Old 16th June 2006, 02:18 AM   #13
diyAudio Member
 
Join Date: Jun 2006
well sort of....
thats alot of math there...

pretty sure rectacgle...for port issues...
and the speaker has a double stack magnet(Hugh) even larger that than the titianic's

you stated a 16" cube...
so to go rectangle i need 18" Tall/Long...and 12"/14" for the rest
correct ?
  Reply With Quote
Old 16th June 2006, 05:43 AM   #14
diyAudio Member
 
roger_lew's Avatar
 
Join Date: Nov 2005
Location: Moscow, ID
18*12*14=3024 cubic inches, which is smaller than what you need.

In my example you needed ~4041 in^3.

You could have internal dimensions of 18" x 15" x 15".

And don't forget that these are internal dimensions so if you use 3/4" MDF your box will have external dimensions of 19.5" x 16.5" x 16.5".
  Reply With Quote
Old 18th June 2006, 03:41 AM   #15
diyAudio Member
 
Join Date: Jun 2006
the box is built...
and drying...
tommorow is Sub Day...Yeah !

Built it out of 3/4" MDF, seperated the amp from the main box, and placed an extra 1/2" on the front and back, for a total of 1 1/4 thick...
braced the ports in the rear as well...
24" Long Total (last 4.5" is for the amp)
16.5" x 16.5" for the rest, with two 3" x 15.5" Ports...

Caint wait to hear it...
Keep ya posted...
  Reply With Quote
Old 20th June 2006, 12:50 AM   #16
Norcad is offline Norcad  Norway
diyAudio Member
 
Join Date: Jun 2006
Sorry Of course it's 12 ohm in serie.

BUT The Small/Thiele parameters DO CHANGE, if you use the voice coils separate.
The parameters you got, was with the DVC in series og paralell.
Qes = 0,47 & Qts = 0,41

With the DVC separate this will be:
Qes = 0,94 & Qts = 0,74

Just try, and you will hear that with seriell or paralell you can achieve an flat response, but try separates, an you would get an about 6 dB boost around 50 Hz, who will make the sub sound "boomy"

An another issue is to adjust the gain of to amps to give the same amount of power, that aint easy.

Norcad
__________________
Norcad
  Reply With Quote
Old 20th June 2006, 04:51 PM   #17
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
The parameters are the same as long as both coils are driven, be that series, parallel or separate. They only change when one coil is left open or shorted.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 21st June 2006, 10:39 PM   #18
Svante is offline Svante  Sweden
diyAudio Member
 
Svante's Avatar
 
Join Date: Feb 2004
Location: Stockholm
Psst... Look in my signature...
__________________
Simulate loudspeakers: Basta!
Simulate the baffle step: The Edge
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
PCB design software nigelwright7557 Swap Meet 0 27th December 2008 01:09 AM
Design Software senee Multi-Way 3 13th July 2007 03:08 AM
Need Design Software? dbaudio Swap Meet 2 15th April 2004 07:54 AM
Does anyone here use Ouickroute EDS 3 design pcb design software? setmenu Everything Else 2 18th March 2004 02:23 PM
Useful design software Bakmeel Solid State 7 6th November 2002 06:51 PM


New To Site? Need Help?

All times are GMT. The time now is 05:50 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2