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1983 Linear Technology 2x43 Electronic Crossover / Network

C

Chris_M_JBL

New Member
Hey everyone,

I'm trying to dig up some info on a really obscure piece of vintage gear. It’s a pair of Linear Technology 2x43 Electronic Crossover Networks, built in the USA around 1983.

There's a pair of these near me right now that I'm looking at buying. they were made specifically to pair with my JBL 4344 monitors, but information online is practically non-existent. I wanted to see if anyone here has ever run across them or how this specific setup is supposed to work. based off of looking at the back of them i can only assume that one box is for the left channel and the other is for the right. ive questioned AI but i dont trust that for what its worth, other than how the crossover splits the frequencies.

If you’ve ever owned, serviced, or even just seen one of these in the wild, I’d like to hear your thoughts or any history you might know about it!
i would also be quite interested if anyone has ever seen a schematic for these.


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Thanks,
Chris
 
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They couldn't have gotten very far representing themselves as "Linear Technology" in 1983. Could it just be a prototype or custom build?
 
audiotemp said:
They couldn't have gotten very far representing themselves as "Linear Technology" in 1983. Could it just be a prototype or custom build?
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this isnt the only pair that ive seen for sale, so maybe neither. they apperantly also made control amps, power amps, and for whatever reason a compact disk player. the most that ive found is It is an external network that can be connected to the bi-amplifier driver terminal of crossover frequency 300Hz, so i guess one box per channel
 
I assume you'd set your JBLs to bi-amp mode and then these would substitute for the built-in woofer/mid crossover section. Without literature it would be just a guess as to whether this would make an improvement. Is the 4344 known to have a weakness in that area? Or maybe it's meant to change the sound somewhat for a particular application.
 
It appears to be a passive network built from multiple capacitors and inductors to improve upon the internal low frequency crossover.
 
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Yeah one box per channel. Amp to xover, output from xover to the speaker. I would assume the idea is the internal crossover in the JBL are bypassed somehow since it makes no sense to run two in series.
 
Sounds like these are aimed more at the 4345 then, or maybe the idea is they externally convert a 4345 into a 4344 so it can be fed from a standard amp setup
 
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