Eclosure suitable for this driver. - 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 9th June 2010, 03:06 AM   #1
diyAudio Member
 
Join Date: Nov 2009
Location: Pune
Default Eclosure suitable for this driver.

Hello,

I got a 8 inch driver with the below mention specifications. I did built vented enclosure but was not really very happy with its performance. I would give all details of my design to you but later so that your suggestions won't get biased ,I request you all to suggest me a design for the driver like Vol. Vent length, diameter. material to be used for enclosure with recommended wall thickness and enclosure dimensions.

The specifications are:


Fs 31.55 Hz
Re 3.5 ohms[dc]
Qt 0.34 -
Qes 0.36 -
Qms 5.15 -
Mms 60.32 grams
Rms 2.320438 kg/s
Cms 0.000422 m/N
Vas 38.37 liters
Sd 254.47 cm^2
Bl 10.765342 Tm
Lp(2.83V/1m) 90.76 dB
Xmax 6.75 mm
__________________
There is always a first time....

Last edited by Aucosticraft; 9th June 2010 at 03:22 AM. Reason: Missed some points
  Reply With Quote
Old 9th June 2010, 03:30 AM   #2
Ron E is offline Ron E  United States
diyAudio Member
 
Ron E's Avatar
 
Join Date: Jun 2002
Location: USA, MN
Well, you don't say intended use...
You don't say what you didn't like...
Are the specs accurate measured or advertised specs?

Without using software or anything, I would say a start would be 25-35 liters, tuned to 35-32 Hz....port dims, wall thickness and enclosure dimensions are secondary....not to say they are not important, but the devil is in the details.
__________________
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
  Reply With Quote
Old 9th June 2010, 05:19 AM   #3
diyAudio Member
 
Join Date: Nov 2009
Location: Pune
Thanks Ron,

You were really quick, Well I intent to use this woofer with my home theater 65% for music.
I haven't disclosed what I didn't like, so that the the suggestions would not be tuned to my personal choice. about the specifications, yes they are actually measured but the to my astonishment the specifications provided by manufacturer is hardly different.
__________________
There is always a first time....
  Reply With Quote
Old 9th June 2010, 02:47 PM   #4
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Well, there's always a 0.5 Qtc sealed to get the extension required for HT as well as the critical damping for music, but the price of course is limited dynamics.

A low tuned TH will get you more dynamics down to an octave below Fs with high damping at the expense of increased cab size, but four drivers at rated power in sealed cabs that sum to the same net Vb yields the same performance; so if budget permits, my choice would be to buy three more drivers and locate these small ~61 L net sealed cabs around the room to even out its modes somewhat.

A good compromise option if only one driver would be a T-TQWT, but I'll let bjorno do his 'thing'.

BTW, for my records, what make/model is this and what is its Pe, Le?

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 9th June 2010, 03:11 PM   #5
tb46 is offline tb46  United States
diyAudio Member
 
Join Date: Jan 2006
Location: Texas
Default Boxplot_Vented

Hi,

Here is Boxplot's vented alignment.

Regards,
Attached Images
File Type: jpg Aucosticraft_8in_vented.jpg (81.4 KB, 86 views)
__________________
Oliver
  Reply With Quote
Old 9th June 2010, 03:13 PM   #6
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Quote:
Originally Posted by GM View Post
A good compromise option if only one driver would be a T-TQWT, but I'll let bjorno do his 'thing'. GM


b
Attached Images
File Type: gif Acousticraft_T-TQWT.GIF (135.6 KB, 89 views)
  Reply With Quote
Old 10th June 2010, 05:54 PM   #7
diyAudio Member
 
Join Date: Nov 2009
Location: Pune
GM, tb46 and bjorno, Thank you all for the reply. I am studying on what you said. actually I have to get my Sound Card replace so that I can re-tune my subwoofer.

Well the make is Iwai its India made. these people don't have dealers they directly sell. cost is really good. and these people are really supportive once they know you are serious designer. also these people are OEM for some International brands.



please go through the screen below for my current design
Attached Images
File Type: jpg 125.jpg (89.0 KB, 67 views)
__________________
There is always a first time....
  Reply With Quote
Old 10th June 2010, 06:57 PM   #8
tb46 is offline tb46  United States
diyAudio Member
 
Join Date: Jan 2006
Location: Texas
Default Post #7

Hi Aucosticraft,

There seems to be something wrong with the vent area/length ratio, when I use Boxplot to calculate for the same volume I get:

Vb = 23.45 L (0.83ft^3)
Fb = 36.2 Hz
Av = 6.2 cm Dia.-30.29cm^2 (2.44"Dia.-4.68in^2)
Lv = 25 cm (9.83")

Regards,
__________________
Oliver

Last edited by tb46; 10th June 2010 at 07:11 PM.
  Reply With Quote
Old 11th June 2010, 03:41 AM   #9
diyAudio Member
 
Join Date: Nov 2009
Location: Pune
Yes tb46, thanks, I too noticed it. The tool "Subwoofer simulator" gives good vb for deep and optimized bass. With some other projects I did experiment I usually make a larger enclosure then gradually reducing the volume I tune it to my need. while changing enclosure volume, I have to tune port too. while I was experimenting this way I found this tool gives me the bass I am looking for. but I always tune port with experiment.

I am waiting for new soundcard, so with the help of LIMP I could get the true picture.
__________________
There is always a first time....
  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
This driver suitable for OB? Fast1one Subwoofers 9 25th April 2011 05:29 AM
fr driver suitable for car use? brookbh Full Range 5 28th June 2008 08:10 PM
Any suitable driver for horns available in india? venki Multi-Way 0 23rd September 2005 11:57 AM
Suitable driver for Ultralinear? arnoldc Tubes / Valves 10 11th November 2003 10:23 PM
What eclosure for Visaton BG20 zek Multi-Way 7 15th August 2003 05:28 AM


New To Site? Need Help?

All times are GMT. The time now is 12:31 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