Foster FE103A - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 15th February 2008, 06:15 AM   #1
rca9449 is offline rca9449  United States
diyAudio Member
 
Join Date: Jun 2007
Default Foster FE103A

Does anyone know what's the specs for the vintage Alnico Foster FE103A. I have a pair coming and just wondering if they would be usable with a 3/4 watt single ended darling amp.

Also, has anyone try them on open baffle with a low frequency helper - something similar to this: http://www.quarter-wave.com/OBs/OB_Design.pdf

I plan to copy this design except running the FE103A without any crossover.

Thanks in advance.
  Reply With Quote
Old 15th February 2008, 06:45 AM   #2
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Actual T/S will vary from unit to unit.

Fs from 85 to 150, efficiency from 89-92 dB.

When you get them please post pics. I have had quite a few of these, some need some attention before use.

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 15th February 2008, 09:22 AM   #3
Piek is offline Piek  Europe
diyAudio Member
 
Piek's Avatar
 
Join Date: Oct 2006
Hi, here is the response of the Sigma (red line), if this is comparable...

FE103Sigma

-Micha
  Reply With Quote
Old 15th February 2008, 12:11 PM   #4
rca9449 is offline rca9449  United States
diyAudio Member
 
Join Date: Jun 2007
I will post pictures when they got here Dave. By the way, have you ever used two of them in parallel per cabinet - I can use the 6db efficient bump - wonder if that will mess/smear up the wonderful midrange.

Thanks for the link Micha. I will check it out.
  Reply With Quote
Old 15th February 2008, 04:49 PM   #5
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
If you had them on the same baffle, it will destroy the mids + treble. Not recommended. If you must, bipole or possibly one on the top (though there's an increased risk of damage) will give a semi-omni effect & not cause the same lobing issues you'd otherwise run into.
__________________
Community sites www.frugal-horn.com http://frugal-phile.com/
  Reply With Quote
Old 15th February 2008, 05:19 PM   #6
badman is offline badman  United States
diyAudio Member
 
badman's Avatar
 
Join Date: Sep 2003
Location: Sunny Tustin, SoCal
Default Minor Nitpick

3 dB efficiency bump, 6dB sensitivity bump.
__________________
I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!
  Reply With Quote
Old 15th February 2008, 06:06 PM   #7
rca9449 is offline rca9449  United States
diyAudio Member
 
Join Date: Jun 2007
thanks badman - that's what i meant.

that's what i thought Scott. i will just use one. thanks.
  Reply With Quote
Old 15th February 2008, 06:13 PM   #8
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally posted by rca9449
By the way, have you ever used two of them in parallel per cabinet - I can use the 6db efficient bump - wonder if that will mess/smear up the wonderful midrange.
We had 2 pair of these in BD-Pipes. They worked well.

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 7th March 2008, 04:04 PM   #9
rca9449 is offline rca9449  United States
diyAudio Member
 
Join Date: Jun 2007
Default Pictures

They finally arrived. Pictures enclosed as promised Dave.

They are different - can't really use them. Perhaps someone has an odd ball that they want to trade. I really want to use that alnico magnet.
Attached Images
File Type: jpg dsc_0187.jpg (69.4 KB, 478 views)
  Reply With Quote
Old 7th March 2008, 04:05 PM   #10
rca9449 is offline rca9449  United States
diyAudio Member
 
Join Date: Jun 2007
Default 2nd pict

.
Attached Images
File Type: jpg dsc_0188.jpg (82.5 KB, 458 views)
  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
Buschhorn MkII w/ Foster W422, aka Fostex FE103A DRCope Full Range 54 11th April 2013 05:03 AM
Foster FE103a: how to fix stiff treated cloth surrounds KT Full Range 7 25th September 2009 12:55 PM
FE103a justpoor Full Range 7 23rd February 2007 09:44 PM
Pics of BD-Pipe w FE103A planet10 Multi-Way 11 25th August 2002 01:15 AM


New To Site? Need Help?

All times are GMT. The time now is 12:15 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