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Anyone seen this? Curious that there was no before and after listening review.https://youtu.be/F_hhoUz3bkQ?si=EqaVVygpbQZnLTgK

I've scanned and created a PDF of my JBL4312 Instruction Manual. If it's not already on the site (I couldn't find it) and it's of any value let me know how to upload it and I will.

In the meantime...

That’s right but it does make you wonder why they use the language they did in the engineering standard document for the LE5-12.

I’m still confused by the engineering standard document I posted earlier which contradicts the cone movement I’m seeing.

A big hint I’d say and one that I’ll take. Thanks for your input gents.

Thanks for your input Richard. I’ve got no complaint with the way the speaker sounds as it is. However, I am curious about what they might sound like with the polarity switched. Is there any...

I found this document on another thread which gives me a clue. It says a positive signal to the male terminal gives forward cone motion. It seems mine may indeed have been wired incorrectly from the...

Hi Richard,

Thanks for the welcome and your reply. I’ll have to have a closer look at that terminal in the morning to see if it’s indeed a red mark or just a rusty spot. It’s late here in Sydney....

Hi everyone, first post and hope you can help me. I own a pair of 4312's which I've had from new since 1984. Only today I downloaded a speaker polarity test app on my phone and out of curosity tested...