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JBL L110

KeyserSozee

KeyserSozee

Active Member
I recently had a pair of JBL L110’s dropped off to me in complete disarray (electronically). I’m in the process of replacing the famed JBL 033 tweeters… wish me luck! I may post my results here when it’s all wrapped up.

My (first) question is.. How accurate are the JBL N110 schematics? (Attached)
I have faith in this schematic, it’s looks proper at a quick glance. I will have to wire them as shown in the schematic, as they were completely dismantled when delivered.

IMG_0442.jpeg

My second question is… Typically the ‘marked/striped’ wires are used for negative speaker connections, and the ‘solid’ coloured wires go to the positive terminals.
This schematic shows the ‘MF’ driver wired out of phase. *This would be assuming that all ‘striped’ wires go to their respective drivers negative terminal and the ‘solid’ coloured wires are going to the speakers positive terminals.

Any insight would be appreciated,
Thanks!
 
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Certain types of crossover designs do require wiring some drivers out of phase with others. I built a pair of SB12.3 -kits from Madisound- and the mids/tweeters are wired out of phase with the woofer due to the crossover design.

This is from the Zaph website:

Important: Since the crossover between the woofer and the mid is 2nd order, both the midrange and tweeter are hooked up in reverse polarity with the positive terminals going to ground.
 
Thanks for the reply

I understand that speakers commonly wire certain drivers out of phase with others, for different reasons. I am not interested in general speaker phasing information..

I’m specifically concerned with the JBL L110 itself. It shows the Mid driver being wired out of phase with the tweeter and woofer (in the schematic). The Mid-Frequency driver in this model is glued to the cabinet face and sealed in a tube from the inside.

I guess this is just a silly question, because..
-The schematic IS correct
-The MF driver is sealed, as well as out of phase (makes sense)
-It’s easy to modify given any changes needed

I guess I answered my own question.. but I’ll keep my eye out for any additional info from the JBL aficionados. Thanks
 
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