Jensen BLH - 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 5th February 2012, 10:07 AM   #1
diyAudio Member
 
Join Date: Jan 2004
Location: Washington State
Default Jensen BLH

Hi ... I have been looking at building this old Jensen corner horn. Would HornResp, ironing out the kinks, be better than trusting the engineers at Jensen to know what they were doing? The common chamber behind the vee is quite large. Most of this type (Jubilees, etc.) are made with divider. I do tend to like open as a pressure equalizer, but?
Thanks, Zene
Attached Images
File Type: jpg bulletin3-3.jpg (78.5 KB, 216 views)
  Reply With Quote
Old 5th February 2012, 10:21 AM   #2
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
I think you can take it that the engineers at Jensen knew what they were doing. There wasn't a whole lot the pioneers of audio from the '30s onward didn't do. This is a fairly simple design from, if memory serves, Jensen's own Tech. Bulletin No.3 (aping Altec's famous Technical Letters).

Couple of thoughts: that box was designed for contemporary 12in to 15in drive units, be they full-range, co/triaxial or woofer. Typically, we're talking units with high efficiency and equally high Vas here, so on both counts, it needs to be big.
  Reply With Quote
Old 5th February 2012, 11:06 AM   #3
diyAudio Member
 
Join Date: Jan 2004
Location: Washington State
Scottmoose ... Just want to make sure I spoke with straight tongue. Pic shows area I was referring to. Zene
Attached Images
File Type: png Jensen II.png (70.8 KB, 202 views)
  Reply With Quote
Old 5th February 2012, 01:24 PM   #4
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
There looks to be a slight expansion discontinuity, which would show up on the impedance plot. I doubt it'd be a big deal though, & will help with the low-pass effect. If it really bothers you, you could put a front-rear partition in. I suspect I'd just leave it alone on the basis that life is too short.
  Reply With Quote
Old 5th February 2012, 02:11 PM   #5
diyAudio Member
 
Join Date: Jan 2004
Location: Washington State
Scottmoose ... thx for explaination. I agree to leave alone. I've built Khorns and LaScalas and they are not easy for anyone that wants to try. Now, where is my 50 year old drawing equipment? Zene
  Reply With Quote
Old 5th February 2012, 04:33 PM   #6
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
Zene,

I thought you might find this of interest too.

DECWARE CORNER HORNS
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  Reply With Quote
Old 5th February 2012, 04:45 PM   #7
diyAudio Member
 
spkrman57's Avatar
 
Join Date: Sep 2007
Location: Columbus Ohio
If I ever get enough room to use these in some corners I have the 12" version and will find out some day how well they work. I just have hoarded too much spkr cabs over the years and it has killed my available space.

I'm hoping this spring to rectify that situation and post the results on this forum.

Regards, Ron
__________________
Tubes and horns - JBL pro for home use!
  Reply With Quote
Old 5th February 2012, 05:07 PM   #8
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
If you search there is another thread on this horn.

Click the image to open in full size.

dave
Attached Images
File Type: gif JensenCompactHorn3D.gif (34.2 KB, 150 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
FS: Jensen JT-11P-1 line transformer WTB/WTT: Jensen JT-DB-E jsmith1 Swap Meet 0 26th August 2011 11:06 PM
Chambersize in a BLH Bkaasen Full Range 12 25th January 2011 04:57 PM
blh driver bigcatdairy Full Range 11 5th November 2008 06:11 PM
BLH or OB - ? freddi Full Range 0 30th December 2006 08:08 PM
BLH of LE8T cominup Full Range 4 24th November 2006 07:45 AM


New To Site? Need Help?

All times are GMT. The time now is 12:37 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