BLH of LE8T - 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 22nd November 2006, 07:13 AM   #1
cominup is offline cominup  Viet Nam
diyAudio Member
 
Join Date: Apr 2004
Location: hanoi
Send a message via Yahoo to cominup
Default BLH of LE8T

Hi all,

Please, anyone has plan for Back Load Horn of JBL LE8T? I've found on our 4R but I couldnot find out. Have you ever seen that one be build already? Or I can use BLH of Fostex FE206 (FE208) b'cuz they are 8' driver?

Do you have any comment if LE8T goes with some kind of tweeter like JBL L20 or L25? And x-over is just simple only one cap or they need more?

Thanks,

Cominup.
__________________
Ill do it by myself
  Reply With Quote
Old 23rd November 2006, 08:15 PM   #2
diyAudio Member
 
Join Date: Sep 2004
Location: Paris' suburbs
these speakers will be better in bass reflex or closed enclosures.

my 70 liters @35Hz were terrific !

add a tweeter with a simple cap from around 12 kHz or a little less.

ribbon or VIFA XT25 will perform very well with those Le8

regards

Lagroute
  Reply With Quote
Old 23rd November 2006, 10:01 PM   #3
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Got any T/S parameters or a link to them? I don't have time to go seeking them out at present, as I feel rotten, and I've a ton of work to do, but we can give a more detailed answer with some more data.

FWIW, there's no reason why they won't work in a BLH: any dynamic driver will, if you're prepared to go large enough, just how large depending primarily on their Q and Vas.
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  Reply With Quote
Old 24th November 2006, 07:43 AM   #4
cominup is offline cominup  Viet Nam
diyAudio Member
 
Join Date: Apr 2004
Location: hanoi
Send a message via Yahoo to cominup
double post,

Mod delete pls!

Thanks,
__________________
Ill do it by myself
  Reply With Quote
Old 24th November 2006, 07:45 AM   #5
cominup is offline cominup  Viet Nam
diyAudio Member
 
Join Date: Apr 2004
Location: hanoi
Send a message via Yahoo to cominup
Thanks for your attention.

Pls, find here attachment:

"Even more

--------------------------------------------------------------------------------

Thanks for the link; I missed that thread the first time. It makes sense that there would be a consumer labeled version of the 2115.

But I was thinking there was something older than the Aquarius, and went looking in the catalogs. Is this site's library a great resource, or what!? Here is the one I remembered; I have a dim memory that someone posted about it several months ago:

http://www.lansingheritage.org/image.../page08-09.jpg

This shows a LE8 from the 1962 catalog, which apparently introduces the "new" LE series in a separate section. The picture is a little blurry, but appears to me to show a black cone with a large whizzer cone, and an aluminum center dome.

Only two years later, in the 1964 catalog:

http://www.lansingheritage.org/image...964/page13.jpg

there is an LE8T with no whizzer, and a white cone.

In the 1969 catalog:

http://www.lansingheritage.org/image...ome/page22.jpg

there is a D280, which appears to be a D208 with a white cone, supposedly "water resistant".

The 2115 appears in the 71 Pro catalog.

All of these have a white surround - didn't someone post a while back about this white plastic/rubber stuff getting stiff and cracking? My LE8Ts - I don't know when they were manufactured - had rotted dark gray surrounds when I got them, and the current kits have what appears to be the same. The dark surround first appears in the 1974 pro catalog on the 2115, though the 74 home catalog shows an LE8T with white surround.

In the 1979 components catalog, there is the LE8T-H, which I assume is the ceramic magnet version. I suppose that dates mine to between 74 and 79.

So .. all these appear to be different 8" fullrange speakers:

D208/2110
D280
LE8
LE8T
LE8T-2/2115
LE8T-H

I haven't even tried to figure out the 8" midranges ... "


(Copy of Paul Joppa from http://audioheritage.org/vbulletin/s...&highlight=le8)

Some more infor:

"Fs = 55 Hz
Qms = 4
Vas = 36 liters
Cms = 761 m/N
Mms = 11 g
Rms = 0.95 mohms
Xmax = 5.588 mm
Xmech = 11.18 mm
P-Dia = 152.4 mm
Sd = 0.0183 sq.m
P-Vd = 102 cu.cm
Qes = 0.54
Re = 5.5 ohms
Le = 0.3 mH
Z = 8 ohms
BL = 6.2 Tm
Pe = 30 watts
Qts = 0.48
no = 1.07 %
1-W SPL = 92.4 dB
2.83-V SPL = 94.1 dB

(The LE8TX is a 16 ohm version.)
"

Hope that it fullfill your request.

Thanks again.
__________________
Ill do it by myself
  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
Jbl Le8t-h e_fortier Swap Meet 13 11th August 2009 07:52 PM
JBL LE8T-H for sale on e-bay e_fortier Swap Meet 2 12th September 2008 01:27 AM
What to do with a JBL Le8T ? Lagroute Full Range 17 26th August 2005 11:15 AM
New JBL LE8T-H PSz. Multi-Way 2 23rd July 2004 12:37 AM
New JBL LE8T-H Drivers jimbo149 Swap Meet 0 5th January 2003 02:44 AM


New To Site? Need Help?

All times are GMT. The time now is 05:45 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