Office desk as open baffle subwoofer - 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 28th June 2009, 06:17 PM   #1
diyAudio Member
 
Franz Gysi's Avatar
 
Join Date: Oct 2007
Default Office desk as open baffle subwoofer

Hello

Some some weeks ago I converted my home office desk into a subwoofer:

Adding a wall on the backside and on one side converted it to a big open baffle.

In the backwall I mounted a 15" Goodmanns Axiom, actively driven over a DYI crossover and LM3886 Amps in bridged configuration.

Click the image to open in full size.

On the desks top I am using two Fostex FE83E, glued with silicon into two ceramic balls (normally used for garden decoration).

Driven by a TA2024 amp.

This is my nearfield setup, to listen harddisk stored sound, via a CS4398 DAC with output transformers.

It's sound is great: having enough bass (down to 30Hz) equalizes the highs and opens the mids.

And, with normal sound levels, absolutely no problems for the neighbours, at least in my flat.

Body sound included, when in contact with the desk!

Have fun!
Franz
  Reply With Quote
Old 28th June 2009, 06:24 PM   #2
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Looks good - nice to hear of an OB sub going so low...

Does your laptop "walk" around, when you turn it up??

Chris
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote
Old 28th June 2009, 06:37 PM   #3
diyAudio Member
 
Franz Gysi's Avatar
 
Join Date: Oct 2007
Quote:
Does your laptop "walk" around, when you turn it up??
Just to set the relations: this is not a laptop, it is a normal keyboard and a 22" screen

This open baffle is quite big, but you are not aware of it, when you enter the room! An elegant way to camouflage the open baffle...

High WAF guaranteed!!!

In the first weeks, I used a 8" driver. But I really prefer the big one, mounted since yesterday.

Click the image to open in full size.

Franz
  Reply With Quote
Old 28th June 2009, 08:33 PM   #4
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Dang! I have a huge corner 'L' shaped work table stored out in the garage that I'd planned to do the same thing with except load a stereo pair of 12" Avatar/Adire Shiva sub drivers to it as I've had about all I can tolerate from this little CREATIVE brand 2.1 boom-box computer system. So much for my Winter Surprise system posting.

After seeing yours, I may have to move up the timetable. Oh well, great minds think alike, right?

Like the little 'FR' driver balls too, though I haven't made up my mind which of the various old RadioShack (RS) drivers I'll use. The 40-1197 would be the closest, but I'm thinking the 4" x 10" oval 40-1297 on their own OBs turned vertically to minimize vertical dispersion/maximize the horizontal might be the 'Hot Ticket'.

Time will tell. Thanks for sharing! Now that the 'cat's out of the bag', maybe others will give it a try.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 29th June 2009, 04:15 PM   #5
diyAudio Member
 
Franz Gysi's Avatar
 
Join Date: Oct 2007
Sorry, GM

I did not want to disturb your next winters surprise project!

The idea was born in a german audio forum, when I asked for a subwoofer project for my desk.

My first intention was some flat box who will find its place behind the flatscreen.

Why do you want to use a stereo setup for the woofer? I see only problems, using more than one sub source. Please be aware, that ALL stereo recordings are in mono for the bass region.

Now, I am playing with the idea, to replace the fullrange speakers by ESL panels...

Franz

P.S.
For german speaking readers: This is the thread where the idea is born:

http://www.rahaso.de/foren/msg.php?f...bau&idx=50238&

and here it is documented how "loudpipes" and PeterG developped the idea, triggered by the threads title "looking for ideas for an office desk subwoofer":

http://www.rahaso.de/foren/msg.php?f...bau&idx=50244&
  Reply With Quote
Old 29th June 2009, 04:47 PM   #6
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Greets!

Thanks for the thought, but my 'lament' was only made in jest and not to be taken seriously.

Yes, I'm aware that virtually all recordings are mono below 120-150 Hz depending on the format and/or the whim of the recording engineer. I meant 'stereo' only to denote that each sub driver would be fed by the same stereo amp as the mains even though they will be centered at the 'sweet spot', though not centered on the OB.

ESL panels would be really nice to have, but well beyond my proposed project's budget.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 29th June 2009, 05:05 PM   #7
diyAudio Member
 
Franz Gysi's Avatar
 
Join Date: Oct 2007
Hello GM

What budget? We are speaking about DIY.

So you must be talking about time budget?



I really like this setup. But dont forget:

It IS a nearfield setup, this kind of desk-subwoofer-baffle.

Neverless the room is still playing an important role.

Franz
  Reply With Quote
Old 29th June 2009, 05:45 PM   #8
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Financial, as in 'if I don't already have it lying around' it's not in the budget.

Yes, I'm well aware this is a near-field situation and that room modes will still dominate down low.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 29th June 2009, 06:13 PM   #9
diyAudio Member
 
Franz Gysi's Avatar
 
Join Date: Oct 2007
Quote:
Yes, I'm well aware this is a near-field situation and that room modes will still dominate down low.
Exactly, my limited english does not allow to express it like you did

Quote:
Financial, as in 'if I don't already have it lying around' it's not in the budget.
Just keep ESL in your mind and one day, you have all (or most) you need lying around.

I am sure about it!

Franz
  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
Unibox Run in Open Office? PB2 Multi-Way 2 12th November 2008 02:08 PM
Loudspeaker design using Open Office Calc (or Excel) pelanj Multi-Way 21 6th November 2008 11:01 PM
Murphy baffle radios [ open baffle ] keithpeter Full Range 10 11th September 2007 07:59 PM
open baffle subwoofer "enclosure" dimensions noodle_snacks Multi-Way 4 18th July 2006 06:51 AM
Australians- what solid timbers for baffle? (open baffle loudspeaker) tktran Multi-Way 13 29th November 2004 11:09 PM


New To Site? Need Help?

All times are GMT. The time now is 12:24 AM.


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