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JBL Flip 4 tragbarer Lautsprecher. IPX7-wasserdichter Bluetooth-Lautsprecher, der mit dem CES Innovation Award 2017 ausgezeichnet wurde.

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Why playing via AUX cut's on quiet passages in the songs/movies?

There is this problem with JBL Flip 4, I think that playing via AUX sound is more controlled, clearer bass and less distortion. But it cuts out the sound on quiet passages in the songs, or in the movie, it soo annoying. Does anyone have a solution? It works fine with BlueTooth, but let's say, movies, the sound has a delay via BlueTooth so it's weird.

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As a workaround, you can run a signal generator app in the background, set to very low frequency like 20 Hz, and low but not too low amplitude. Flip4 will reject this frequency and not distort/waste power, but it will be alive all the time.

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Thanks a lot, i find even 1hz is enough to solve the problem. Bit annoying to set up every reboot but at least it solves it.

von

Can you suggest a signal generator app?

von

Thanks for this. I am using Audio Measurement System to generate a 20 Hz signal with -30 dB, which solves the issue. You can find the app here: https://sourceforge.net/projects/audmes/.

Other options for signal generation can be found here: https://listoffreeware.com/best-free-sig...

I also emailed JBL about this issue. Let's wait and see.

von

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Hi, dude!

I had the same problem with my JBL flip 4, but i know how to solve it. Try to set max volume on your device and then set optimal volume with +/- buttons on speaker. If the sound from connected device is low, flip 4 is cut it out. I don't know why, but it is so.

I hope that I helped you.

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I don’t have a fix fix, but I have found that I can turn on a YouTube vid of a constant 12hr dog whistle and that will keep the speaker awake.

There is still sound coming through the speaker, but you can’t hear it, so it doesn’t interfere with whatever you are listening to.

Might annoy ya dog though. But I turn YT’s volume down really low and that still keeps it awake.

You would think in the 2 year span from the original post that JBL would have figured it tf out.

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It is possible to hack the pcb to fix it. Extract the board, locate Q12, and solder a wire that shorts its collector (middle terminal) to ground. This will make Flip 4 think there is always audio going into aux.

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You may also want to remove 33-ohm resistors, that may reduce distortion for signal sources that have high-ish output impedance.

This hack causes a few side effects though: Bluetooth pairing sounds will not be played. Bluetooth audio does work, just no pairing sounds.

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Thank you for the deep detailed info. If the transistor is shorted, would it may be a good idea to cut AUX channels off after (or before) R148 and R106 ?

For my very unexperienced view it looks like the whole block has no function then.

von

@Frank Weichert yes. And it is likely to improve the sound a bit, as the transistors are a very nonlinear load, and can cause distortion if music source output impedance is high.

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What I did to get around this was plug it into power, BUT, when I tried to fix this issue while plugged in with an iPhone charger(the dinky 5w one that comes in the boxes of most iPhones), it did NOT work. I used a more powerful wall adapter and there is no more cutting out. Hope this solves your issue:)

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hello! I have JBL Charge 4, and it have the same problem!! All that I notice after half year of using is that the speaker’s aux volume is saving separately from volume via bluetooth. How it helps me: I simply set low aux volume on the speaker and adjust volume on Device. The stronger is signal, the less cuts would be. Unfortunately, it doesn’t work ideal, but it can helps with 80% sounds you play. So, JBL, PLEASE FIX THIS STUFF!!

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Hi,

Maybe you should contact JBL via email about the problem.

i'm pretty sure that they're not reading this forum.

The more people that tell them about the problem, then eventually they might listen

von

you are right, mate )

von

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Peter Susič wird auf ewig dankbar sein.
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