JBL LE-8 Speaker Cabinet dimensions

[cjloker]

Hi,

I'm in the process of re-edging two LE-8s that my father had in his stereo system while I was growing up. I removed them many years ago from the cabinets that he had built as they were in need of repair. Unfortunately I did not record the dimensions of the original cabinets. I believe they were ported and he ran the LE-8's as a full range speaker. I would like to build some new cabinets and possibly add a tweeter to the design. I'm guessing there is plenty of recorded information that would be of help in this project. I plan to utilize the JBL's with the Dynaco Mark III's that he alos bulit that I have kept running over the past twenty years. My father was a huge HiFi buff and it would be quite rewarding to have his speakers back in operation.

If you would be kind enough to direct me toward the resources needed to complete this project it would be very much appreciated.

Thanks,

Chuck

[Zilch]

http://audioheritage.org/vbulletin/showthread.php?t=6153

Don't miss the link in post #28.

Maybe tomt can tell us more about it.

Any forum members read Japanese?

http://www.angel.ne.jp/~kankyu/SPLE8T.htm

Tell us the details, please.

Chuck: Please click "User CP," above to enable location display in your profile. The forum likes to know where members are....

[tomt]

read Japanese?

i am not able to do so...

so...

http://babelfish.altavista.com (http://babelfish.altavista.com/)

this seems to work better than google.
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this guy actually has the nerve and dexterity to move
his cone/voice coil around, in the tweeter as well!

http://www.angel.ne.jp/~kankyu/SPLE8T.picture1.htm

[John W]

Here is a link to my first JBL project, which used LE8s. There is some description of the box and port size.

http://audioheritage.org/vbulletin/showthread.php?t=2486

Where are you located? I have since sold the drivers that were in these and the boxes are sitting in the closet gathering dust.

[GordonW]

My inclination, given my experience with the LE8, would be to use a cabinet of similar size as the Lancer 33... around 1.6 to 1.75 cubic feet air volume, with about 2" to 4" thick fiberglass insulation on the inner walls. If you use a 1.75 cubic foot volume, a 3" diameter port, about 7 inches long will be about right (tuning frequency of around 33-34 Hz). Should give solid bass response down to around 33 Hz!!

As for using the LE8 in a 2-way- one suggestion that comes to mind, is to use an LE25 type cone tweeter (LE25/LE25-2/LE26/etc), and the crossover from an L19. The DCR for the LE8 is fairly similar to that of the 116A 8" in the L19... that crossover might well do the trick. Should be pretty easy to duplicate that crossover schematic, using off-the-shelf parts...

Regards,
Gordon.