Woofer to use in a FAST with Alpair 5 (desktop system) - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 30th March 2011, 07:53 AM   #1
Westy37 is offline Westy37  Australia
diyAudio Member
 
Join Date: May 2010
Default Woofer to use in a FAST with Alpair 5 (desktop system)

As the title suggests, I'm looking to build a FAST (Fullrange Assisted Subwoofer Technology) system for my desktop. At the moment I've got the Alpair5s running fullrange in a crude open baffle and I'm pretty happy with their sound. However, they're desinged as a mid-tweeter and this shows. Bass content is muddy and actual low frequency response is pretty quiet relative to the rest of the spectrum.

So the plan is to build a passive FAST design crossed over from the Alpair 5 Grey | Markaudio somewhere in the region of 300-400hz. I don't currently have measurement equipment but it is on the way. So for now I am just trying to work out some candidates for the woofer to be used in this design.

A few restraints that are perhaps worth mentioning.
  • I would like to use a 6.5" woofer due to space constraints.
  • The combined volume for the alpair5 and the woofer per cabinet needs to be less than about 25 litres (again a space constraint). I intend to run the alpair sealed in a seperate chamber.

I would appreciate any input regarding potential woofers for this project. I'm not entirely sure what sort of efficiency I need to be looking at for the woofer and whether a 4 or 8 ohm nominal woofer will work most easily with the 4ohm nominal alpair driver.

One driver that I do have on hand is the Peerless 850122. If that is suitable I'll stop searching for a different woofer but if it's not then it's not a big deal; I'll find another use for it in another project. http://www.d-s-t.com.au/data/Peerless/850122.pdf

Other examples of FAST builds:
Nescio: Alpair5 + Trio8 + DSP = wow
A thread for Tysen and variations on FAST
Tysen Variation FE167E with CSS SDX7


So fire away, what woofers should I be considering?

Last edited by Westy37; 30th March 2011 at 07:57 AM.
  Reply With Quote
Old 30th March 2011, 08:16 AM   #2
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
I'd go ahead and use the Peerless.

I'm going to use a pair of push-push EL70s (in Thirlmere-R) as helper woofers with my A5 (in a 4" PVC TL). I'm using them because they are handy. The woofers will be oriented to the sides.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 30th March 2011, 12:21 PM   #3
diyAudio Member
 
audiobomber's Avatar
 
Join Date: Jul 2004
Location: Sudbury, Ontario Canada
A couple of plans to consider:

Alpair 10 + Alpair 5 Simple Plan | Markaudio

Alpair 5 / SDX7 Team | Markaudio
__________________
Dan
  Reply With Quote
Old 31st March 2011, 12:23 AM   #4
Westy37 is offline Westy37  Australia
diyAudio Member
 
Join Date: May 2010
Thanks for the suggestions. I should have added that I would prefer a subtle looking woofer i.e. not the SDX7.

Looking around a bit more I've seen this woofer:

Audiomarketplace - Exodus Anarchy 6.5" Mid Woofer

Exodus Anarchy tested by Zaph - Techtalk Speaker Building, Audio, Video, and Electronics Customer Discussion Forum From Parts-Express.com

Anyone have an opinion on this one? To me it seems very similar to the SDX7 but minus the flashy looking phase plug.

Last edited by Westy37; 31st March 2011 at 12:25 AM.
  Reply With Quote
Old 31st March 2011, 12:26 AM   #5
Westy37 is offline Westy37  Australia
diyAudio Member
 
Join Date: May 2010
I also meant to ask; what sort of volume should I be looking at for the sealed box of the Alpair5?
  Reply With Quote
Old 31st March 2011, 06:23 PM   #6
diyAudio Member
 
audiobomber's Avatar
 
Join Date: Jul 2004
Location: Sudbury, Ontario Canada
Quote:
Originally Posted by Westy37 View Post
I also meant to ask; what sort of volume should I be looking at for the sealed box of the Alpair5?
If you cross high enough, sealed volume doesn't matter too much. One of the reasons I thought to post the kits was to give you some ideas in case you want to go your own way. For example, you would be safe to use the same volume as Markaudio.
__________________
Dan
  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
Finished desktop tl (henkjan/juoiga) alpair 5 _henry_ Full Range 18 18th May 2014 09:40 PM
Driver/enclosure to complement Alpair 10.2 FR Pensil in a FAST system? southernoise Markaudio 24 7th February 2011 01:04 PM
Alpair 6 Desktop TL TeLHannos Full Range 8 1st July 2010 08:46 PM
FS desktop pcb etching system kjunom Swap Meet 2 7th December 2005 02:36 PM
desktop/micro system diy cosmos///95lux Everything Else 5 31st December 2004 05:42 PM


New To Site? Need Help?

All times are GMT. The time now is 07:15 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