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

Multi-Way Conventional loudspeakers with crossovers

PC Speaker System (2.1) Idea Help
PC Speaker System (2.1) Idea Help
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
Thread Tools Search this Thread
Old 13th October 2006, 05:29 AM   #1
AIA is offline AIA  United States
diyAudio Member
Join Date: Feb 2006
Location: CO
Default PC Speaker System (2.1) Idea Help

I am looking into the idea of building a PC speaker system so that I can chuck my beater Cambridge PC Works set-up so they stop hurting my ears. The concept is a two-way that consists of full range drivers in their own boxes next to the monitor and a separate sub under the desk. Not exactly a bleeding edge idea, I know. I thought Zaph Audio's Hi-Vi B3N(S)'s might be good for the desktops, and I am sure that I can find a decent, inexpensive 6-8" woofer / sub at PE or Madisound. (Any suggestions would be welcome!) We are not talking about major volume or even serious high fidelity here: mp3's and WMA's off the hard drive is the source.

But where I need help is: can I design the XO as if the full range and woofer were in one box, but actually build two (well, three) boxes? I thought of running cables between the boxes that were simply long versions of the internal wiring needed in a regular 2-way. Can I throw a volume pot in there to adjust the volume of the sub down stream from the main volume control, or is there another way to adjust the sub volume? L-pad?

I would like to run the set-up from one amp (a modified radio shack accurian 2x25w), rather than have a dedicated sub amp, so this is the only way that makes sense to me, but what do I know?!?

At the end of the day, this will look and function like most of the commercially available 2.1 computer systems out there, but it should sound a helluva lot better and be significantly more fun to build!

Thanks in advance for any insight.

  Reply With Quote
Old 13th October 2006, 09:42 AM   #2
sreten is offline sreten  United Kingdom
Join Date: Nov 2003
Location: Brighton UK

passive crossovers at bass frequencies are hideously expensive.

I suggest you try the Aura NS3 design found in the Archives section
of Zaphs site, as its desktop near field leave out the baffle step
filter components, as long as your not a bass freak nearfield bass
output may be adequate, certainly very high for a 3" driver.

If you using a computer you don't really need the higher frequency
filter either as its simple to use an onboard graphic EQ to replicate
this filters correction.

make the boxes 2 litres, no point making them any bigger.

Or if you fancy bigger and porting :


Click the image to open in full size.

Though I'd set port frequency to ~ 50Hz.

  Reply With Quote
Old 13th October 2006, 10:36 AM   #3
Geek is offline Geek
diyAudio Member
Geek's Avatar
Join Date: Sep 2004
Those Aurasound's work great for MM

Here's a set I made for my computer:

6.4l BR box (tuned to 48 Hz), they go to 50 Hz quite nicely.
  Reply With Quote
Old 13th October 2006, 01:25 PM   #4
boone is offline boone  United States
diyAudio Member
Join Date: Jan 2004
Location: Portland, Or.

Cambridge PC Works has a decent 3 channel amp ( TDA 1554Q chip ) w/ x-over built in to the woofer cab. I just threw away the Cambridge drivers and hooked up a pair of o.b. 3" sats with an o.b. woof under the desk. Sounds much better.

  Reply With Quote
Old 15th October 2006, 02:22 AM   #5
AIA is offline AIA  United States
diyAudio Member
Join Date: Feb 2006
Location: CO
Thanks for all your input. I think that I have been convinced of using the Aurasounds rather than the Hi-Vi B3S. The Auras may be more expensive, but less has to be built around them like filters and even a sub.

boone - I presume that you used 4 ohm drivers to replace the stock PC Works drivers?

Once this project gets off the ground, I'll check back in with some pics.

best regards - aia
  Reply With Quote


PC Speaker System (2.1) Idea HelpHide 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
7.1 digital speaker idea GestaltH Digital Source 2 2nd January 2011 11:54 PM
speaker grill idea gychang Full Range 3 31st October 2008 10:32 PM
Crazy speaker idea crick Full Range 0 22nd August 2007 12:03 AM
Need idea / help building a 5.1 surround system Amp. mastero Chip Amps 11 16th October 2006 05:21 AM
Speaker idea: best of both worlds Nielsio Multi-Way 12 30th November 2002 06:12 AM

New To Site? Need Help?

All times are GMT. The time now is 03:27 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio