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JBL L100 Homage

Posted 20th November 2010 at 04:55 AM by DougL
Updated 11th February 2011 at 04:50 AM by DougL

I got into audio my freshman year of collage in 1973. While I hated the "West coast sound",
The JBL L100 looked great, and had a great woofer. It is also higher efficiency than most.
HTGuide did a Thread on redesigning the XO and made a very appealing speaker.
I looked up the woofer and its 88 db efficient. So much for perception of efficiency.

My thought was to design a 3 way speaker that is ultra low distortion, 50Hz F6, and 93db efficiency. Borrowing the L100 concept, Driver compliment 12" woofer, 4" mid-range and OS compression driver.

There are at least 3 drivers in the 4" class with 93db Audax HM100Z0 4" Aerogel Mid-range ,
Fostex FE126En 4" Full Range
I already have and love MP14RCY/P in ob, but they are only 90db sensitivity.

The B&C 3/4" or 1/2" CD look like they might be a perfect match. Sure beats a 2" paper tweeter.
Even a B&C Dec 10 on a 6" waveguide would be a start.

Crossover TBD, but a Chaucer Elliptic 3 order with LR4 target slopes may be a good compromise. I could claim its "first order" with zobals LOL.

Box size about 6 cu ft , 48" by 14" wide by 16" deep. Q target .65

We shall see.
Posted in My Projects
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Total Comments 2


  1. Old Comment
    Looking for suitable drivers.
    AE Speakers Online Store
    Looks like the Bee's knees.
    On the less expensive front, a Beta12A looks like it would work with a sealed alignment.
    Dayton PA310-8 12" Pro Woofer @ 97db Fs 44 Hz and Qts .32 may be viable
    Posted 25th November 2010 at 09:22 PM by DougL DougL is offline
    Updated 7th December 2010 at 05:14 AM by DougL
  2. Old Comment
    Posted 20th December 2010 at 03:01 PM by DougL DougL is offline
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