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

simple enclosure for Fostex FE-208EZ?
simple enclosure for Fostex FE-208EZ?
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 2020, 09:17 AM   #1
Havoc is offline Havoc
diyAudio Member
 
Join Date: Feb 2002
Location: Belgium
Default simple enclosure for Fostex FE-208EZ?

I made a pair of Bruce V1.2 from the Frugal-horn site (Spawn family). Started it a long time ago but it got shelved when life came in the way. Can't say I'm happy. Very thin sound, bit like a tiny transistor radio in a cavern.

Is there a reasonably simple enclosure for those Fostex speakers so I can at least salvage them into a usable speaker? The enclosure Fostex proposes is a bit a puzzle of all little pieces and I'd like something with less sawing involved. Something like a simple BR?
  Reply With Quote
Old 28th June 2020, 02:19 PM   #2
Scottmoose is offline Scottmoose  United Kingdom
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
I'm not surprised. Bruce was designed for the FE207E, which had rather different specs. to the FE208ESigma, and for it to work in that enclosure, the latter really needs some series R (or an equivalent high / adjustable output impedance amplifier). The overdamped (low Qt) characteristic is why it's not well-suited as-is to regular vented box loading.

You don't mention what your amplifier is, but if it's a regular voltage source type amp, then with a 2.5ohm power resistor inserted in series, about 13 litres tuned to 67Hz would be OK[ish] near boundaries. If you want more, then assuming about 6.8ohms series R, 44 litres to 44Hz would do, in similar conditions. 8.2ohms series R would allow a Vb = Vas, Fb = Fs alignment, near enough.
__________________
www.wodendesign.com (commercial site)
www.frugal-horn.com www.frugal-phile.com (community sites)
  Reply With Quote
Old 29th June 2020, 05:45 PM   #3
planet10 is offline planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
simple enclosure for Fostex FE-208EZ?
Havoc,

It is worth mentioning that the same resistor trick Scott specifies for a simple reflex should also work with Bruce. I would try that first before venturing towards a new box.

dave
__________________
Stay safe. Stay home. Respect the 2m bubble.
 

Reply


simple enclosure for Fostex FE-208EZ?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Passive Crossover for Fostex 208ez and T90A WayneAudio Multi-Way 36 20th July 2019 04:24 PM
Kofi Annan in: "Unemployment and The Fostex 208EZ (or 206en)" Kofi Annan Full Range 12 14th July 2014 05:46 AM
WTB Fostex FE167E, FE127E, or any fostex suitable for BR enclosure. juanito Swap Meet 3 12th October 2013 03:04 PM
Disadvantage for place the Fostex 168e sigma into Fostex 166e BLH enclosure ? davidshya Full Range 2 27th January 2013 09:41 PM
fostex 208ez and fostex ft17 h good kombo? almightybozo Full Range 1 24th September 2010 06:00 PM


New To Site? Need Help?

All times are GMT. The time now is 11:34 PM.


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