Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

advice on concrete subwoofer enclosure
advice on concrete subwoofer enclosure
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 20th March 2020, 01:48 PM   #1
natedb is offline natedb  Belgium
diyAudio Member
 
Join Date: Mar 2020
Location: Ghent
Question advice on concrete subwoofer enclosure

Hi guys!

I just joined the forum! I am looking for some advice on the construction of a concrete speaker for a design project. In short I am studying engineering and for one of my courses I want to design a speaker using concrete. I already know how to create curved surfaces in concrete but I also want the speaker to sound somewhat decent, or at least design the shape that way. The choice of a subwoofer is based on the sole fact that there are less variables to consider. It would be a passive subwoofer and the budget for the driver is less than 100€.

Any help on specific parameters i should take in account for my build? I want to collect some theoretical background on sound engineering to support my design choices. I'm all ears!

cheers, Nathan
  Reply With Quote
Old 20th March 2020, 02:04 PM   #2
waxx is offline waxx  Belgium
diyAudio Member
 
Join Date: Apr 2014
Location: Belgium
To be able to answer your questions, we need to know what the goal is (frequency spectrum, efficiency, max volume desired)

To start, learn about Thiele & Small (TS) parameters and how that dermines wich driver is fit for what: Thiele/Small parameters - Wikipedia
  Reply With Quote
Old 20th March 2020, 02:08 PM   #3
natedb is offline natedb  Belgium
diyAudio Member
 
Join Date: Mar 2020
Location: Ghent
Well, my technical know how of speakers is rather limited. Would it help if i said that I own a pair of older B&W LM1 speakers and it would be nice if i could pair this sub with them?
  Reply With Quote
Old 20th March 2020, 04:11 PM   #4
Indigent Audio is offline Indigent Audio
diyAudio Member
 
Join Date: Mar 2020
Location: Santa Cruz, CA
Selecting a speaker will determine the box size/shape/type of box which the speaker needs, you can do this by using the t/s info, the manufacturer recommendation or software such as bass box pro etc...Since weight of the enclosure and cost of the speaker are issues you will probably want to choose an 8-10 inch speaker in a ported enclosure. Using concrete as your material will be challenging, if you make it too thin the output of the sub will eventually break it, if you make it too thick it will be too heavy to move. I would recommend a thin wood form with chicken wire to reinforce, then only remove the outside of the form leaving a wood lined reinforced concrete enclosure. If you want something different you could use sonotube of different diameters as your forms. You can look up cider block bookshelf speakers for inspiration, good luck
  Reply With Quote
Old 21st March 2020, 05:23 PM   #5
KaffiMann is offline KaffiMann  Norway
Fanatic
diyAudio Member
 
KaffiMann's Avatar
 
Join Date: Sep 2009
Location: Grua, not far from Oslo.
advice on concrete subwoofer enclosure
Beyma 12BR70 fits the budget and does not need a huge box, sealed 50-60 liters works fine. No earth shattering bass, but very good, and high value for the money!

Build two!
__________________
Things are starting to happen, work in progress: https://kaffimann.com
  Reply With Quote

Reply


advice on concrete subwoofer enclosureHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Polymer concrete as an enclosure material? Hyvok Subwoofers 15 28th April 2014 01:39 AM
Advice for enclosure volume, driver size and porting? DIY coffee table subwoofer ciper Subwoofers 8 21st May 2012 01:38 AM
Need advice on subwoofer/enclosure and winISD ahl395 Subwoofers 7 28th August 2011 06:00 PM
Sub Enclosure made out of concrete Rafal Subwoofers 37 3rd May 2009 03:42 PM


New To Site? Need Help?

All times are GMT. The time now is 11:07 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki