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Jbl 4430

hi, thank you you have been very kind, now I see to finish the restoration of these 4430 ... this bass is not very good for now, there is a lot but it is not nice ...
 
You're very welcome! Did you see this thread?

https://audiokarma.org/forums/index.php?threads/jbl-4430-and-4435-cheat-sheet.673961/

In my opinion, bypassing the biamp switch is the single biggest upgrade (followed by Radian diaphragms in the horns). The biamp switch is a piece of crap that oxidizes badly and dramatically impairs the bass response. You should enjoy much better bass without it. See thread here:

https://www.audiokarma.org/forums/index.php?threads/cheap-and-pretty-easy-jbl-4430-upgrade.537606/
 
Andrea, did you ever get your poor bass problem with your 4430’s sorted out? They should never have a problem with bass output.

The first thing I would look for is either the amp to speaker is wrong polarity to one channel, or one of the woofers is mid-wired so it it out of phase with the other channel.
 
Andrea,

The bass ports should go in the middle like it is pictured in your avatar?

I just setup mine but I have them the other way.
 
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