Help! building acoustic suspension box - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 25th April 2016, 12:01 AM   #1
Rulo is offline Rulo  United States
diyAudio Member
 
Join Date: Apr 2016
Smile Help! building acoustic suspension box

For unique reasons, I need to build a sub-woofer into a space that is 7 1/2"H by 18 1/2"W by 17"D that will only allow front firing. Because of the reduced space I will have to build a custom acoustic suspension box. Because of limited resources I will cannibalize an RCA WF60R, 60 watt sub to use the amp. I can fit a 6" speaker. I know I will not get wall shaking boom... all I want is to bring some depth to my Realistic Minimus 7, 8ohm speakers in a small living room.

2 questions:

1- Should I use one or two 6" speakers and why?

2- Any recommendations on REASONABLY PRICED speakers?

I can build the box but am a real novice on audio. Any help would be GREATLY APPRECIATED!
  Reply With Quote
Old 25th April 2016, 06:03 AM   #2
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

That gives you about 0.9cuft internal volume. TBH I
suspect you want a budget rather than ideal solution.
Its not difficult to add bass to Mimimus7's.

I'd suggest two of these (look like Monitor Audio drivers) :
BS28-6P 6" Aluminum Cone Woofer 8 Ohm Shielded
(Why two ? The box volume indicates two would be much better.)
In your sealed box will be fine, but you could add a vent tuned to 40Hz,
around 2" diameter and 4.5" length, which is more about power handling.

FWIW the ideal solution is probably :
Tang Band W69-1042J 6"x9" Subwoofer
In your box vent tuned to 33Hz (2" diameter x 7" length).
(or 2.5" diameter x 12" length).

rgds, sreten.

Lightly stuff your sealed box, line the walls of a vented box.

Last edited by sreten; 25th April 2016 at 06:32 AM.
  Reply With Quote
Old 25th April 2016, 06:10 AM   #3
AllenB is offline AllenB  Australia
diyAudio Member
 
Join Date: Oct 2008
Quote:
Originally Posted by sreten View Post
I'd suggest two
So would I, for a slight increase in efficiency and peak output since a 6" driver may be marginal to begin with.
  Reply With Quote
Old 25th April 2016, 01:52 PM   #4
Rulo is offline Rulo  United States
diyAudio Member
 
Join Date: Apr 2016
Guys, thank you for responding. You are giving me food for thought and a starting point. Any other thoughts would still be appreciated. Again, thank you.
  Reply With Quote
Old 25th April 2016, 02:06 PM   #5
Rulo is offline Rulo  United States
diyAudio Member
 
Join Date: Apr 2016
Sreten, I am 73 years old and old fashioned; brought up at a time when we used complete words. What is TBH and FWIW?
  Reply With Quote
Old 25th April 2016, 02:14 PM   #6
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
Rulo, they are acronyms from the internet age (or perhaps dating back to bulletin boards).

TBH = To Be Honest
FWIW = For What It's Worth

Basically just ways of saving on typing Not as bad as the textspeak we see from mobile phones!!!! I use them all the time.

Some others you may come accross.

IMO = In My Oppinion
IMHO = In My Humble Oppinion
LOL = Laugh Out Loud

There are plenty of others, but once you know they are acronyms it can be easy to work out from the context. If not just google what does acronym xxx stand for (where xxx is the acronym).

Tony.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos
  Reply With Quote
Old 25th April 2016, 02:21 PM   #7
Rulo is offline Rulo  United States
diyAudio Member
 
Join Date: Apr 2016
Thank you. Since you're obviously a patient man let me push you limits. I understand a ported box would probably bring deeper bass and require less power, but, my understanding was that an acoustic suspension box would be "smoother" across the spectrum. True?
  Reply With Quote
Old 25th April 2016, 02:33 PM   #8
diyAudio Moderator
 
wintermute's Avatar
 
Join Date: Aug 2003
Location: Sydney
Blog Entries: 22
Speakers are all about tradeoffs

What the Sealed enclosure will give you is the best transient response. That is The speaker will return to rest after an excitation the most quickly in a sealed enclosure. This come at the cost of bass extension.

The ported box will give you the bass extention, but at the cost of inferior transient response. There are many possibilities for tuning that response though, and some will be better than others.

The compromises that one person can live with another may not be able to. It is a personal thing, which one really has to find out on their own (either by experimenting, or by listening to different types of systems created by others).

Tony.
__________________
Any intelligence I may appear to have is purely artificial!
Some of my photos

Last edited by wintermute; 25th April 2016 at 02:35 PM. Reason: add comment and experimenting.
  Reply With Quote
Old 25th April 2016, 05:42 PM   #9
Rulo is offline Rulo  United States
diyAudio Member
 
Join Date: Apr 2016
Thank you Tony. I think I'll stick with the sealed enclosure which would be easier for me to build. Any suggestion as to the fill material I should use and where to buy? Thank you again for your help.
  Reply With Quote
Old 25th April 2016, 05:55 PM   #10
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

If you go with the drivers I suggested and a sealed box, just
stuff it with the contents of a very cheap polyester pillow.

rgds, sreten.
  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
effects on box size for acoustic suspension mor2bz Multi-Way 5 16th December 2013 10:57 AM
Acoustic suspension dan stanton Multi-Way 9 12th February 2010 09:40 PM
A question about building a sealed box (acoustic suspension). piro Multi-Way 3 8th March 2005 09:51 PM
Acoustic Suspension Designs BAM Multi-Way 4 23rd October 2003 04:38 PM


New To Site? Need Help?

All times are GMT. The time now is 08:27 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki