multiple driver speaker - 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 26th October 2012, 07:52 PM   #1
diyAudio Member
 
Join Date: Oct 2012
Wink multiple driver speaker

hi
after acquiring a pair of Bifrons hox 05 speakers i'm interested in trying to determine if these boxes are indeed original or at some time in their history they've been re/hacked.
the pair are identical in construction but are two different finishes.also one of boxes had a driver missing.after examining these a little more closely they appear to be an assembly of 9 4 inch full range drivers in a quasi bose scheme 8 drivers on wrinkled baffle and one driver on the back i'm trying to confirm that the box wiring is original it appears that both are wired in a series parallel scheme 8+8+8=24 24/3=8 final but follow a pattern determined by string (series) and position in the box also after a little
research it seems these where originally designed for PA use which leaves me wondering if they originally came with x-formers. Click the image to open in full size.
  Reply With Quote
Old 26th October 2012, 07:55 PM   #2
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
I think you tried to paste the image into your post, instead of the image URL. Can you point me to it so I can fix it?
  Reply With Quote
Old 26th October 2012, 08:01 PM   #3
diyAudio Member
 
Join Date: Oct 2012
sorry not sure what i did i didn't have any pic's ... oops.
  Reply With Quote
Old 30th October 2012, 03:27 PM   #4
diyAudio Member
 
Join Date: Oct 2012
hello...
is anybody out there?!!

help..please..
  Reply With Quote
Old 30th October 2012, 06:32 PM   #5
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
We really need a picture to be able to evaluate. Daniel next door has a pair and has purposely removed one of the isophon edrivers (the 9th one on the back).

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 31st October 2012, 12:15 AM   #6
diyAudio Member
 
Join Date: Oct 2012
Default multiple driver speaker

ok planet 10
here's the speaker porn you requested
so ante up what kind of info/tech documents do you have on these
Attached Images
File Type: jpg bifrons speakers 001.jpg (508.7 KB, 280 views)
  Reply With Quote
Old 31st October 2012, 12:17 AM   #7
diyAudio Member
 
Join Date: Oct 2012
why did your neighbor remove a driver?
  Reply With Quote
Old 31st October 2012, 12:39 AM   #8
diyAudio Member
 
James Lehman's Avatar
 
Join Date: Oct 2012
Location: Akron, Ohio USA
Send a message via Skype™ to James Lehman
IIRC the Bose system that had nine drivers in it was wired with all in series and each speaker was 0.9 ohms.

0.9 x 9 = 8.1 ohms. Weird.

Check the DC resistance of all of the ones that are still wired and then isolate one driver and measure that.

A DC resistance will be lower than the nominal impedance, but not by a whole lot.

James.

Last edited by James Lehman; 31st October 2012 at 12:41 AM.
  Reply With Quote
Old 31st October 2012, 12:44 AM   #9
diyAudio Member
 
Join Date: Oct 2012
they are indeed all 8 ohm drivers model HX125-8 made by Electroakusztikal Gyar (now b.e.a.g.)
  Reply With Quote
Old 31st October 2012, 01:30 AM   #10
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
hmm... the one's i've seen all had isophon drivers.

dave
Attached Images
File Type: jpg iso6FRw.jpg (26.2 KB, 256 views)
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  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
Multiple drivers vs. single driver sub AJ34 Subwoofers 46 16th November 2012 03:49 PM
Multiple driver connection, impedance Dr_EM Subwoofers 5 3rd June 2009 09:44 PM
Multiple driver MMT calculation question JohnIsBaffled Multi-Way 3 4th August 2008 01:31 PM
multiple driver HT sub ..how to design ? JinMTVT Subwoofers 78 4th September 2007 04:56 AM
Multiple driver sensitivity gain? woody Multi-Way 3 12th February 2004 03:24 PM


New To Site? Need Help?

All times are GMT. The time now is 07:24 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