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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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i have the same problem.still have no the solution

von

I have same problem with my speaer. I would never expect such bug from JBL and I will return speaker back. JBL is doing nothing to fix this bug

von

Still a problem for me. Tho on JBL Charge 3. Its annoying cause I updated the speaker thinking I would get rid of a problem I used to have where the speaker would "sleep" after not playing anything for a few minutes and it would then take like 30 seconds for it to wake up.

von

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9 Antworten

Hilfreichste Antwort

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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This is the simplest and most effective solution. Thanks a ton!

von

Thanks, mate, I was going nuts until I saw this fix!

von

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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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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.

Block Image

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.

von

I have a similar issue with my bluetooth speaker, not a JBL.

and the soldering hack work. thank you so much.

but, I guess, now the speaker think that there is audio signal all the time and will not sleep. It will keep turned on until the battery died.

Is it as expected?

von

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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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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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Hi, I’ve found that going into the so-called “low frequency mode” fixes it completely - after also having made a firmware update (so my firmware is now as of 1-aug-2020).

For those unaware, “low frequency mode” does not put in a low frequency booster, as it might sound, but instead disables the sound processor. The same sound processor that cuts out quiet sounds also cuts low frequencies at high amplitudes, to avoid distortion - therefore they call this disabling “low frequency mode” because there will be no more low frequency CUTTING. So, thank you JBL, but I like my sound just as it is; if it’s so loud that it distorts, I can take care to lower the volume or put in an equalizer as I desire.

So:

longpress bluetooth + volume minus - go into “low frequency mode” a k a unaltered sound; longpress them again to return to “processed mode”

Restarting or shutting down reverts to the default “processed mode”.

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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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I’ve been listening to some really chill native american flute, and i’ve noticed the sound cutting out only when i use the AUX cable. I’m not experienced enough to open the board and start burning things, so I followed the advice to turn the volume all the way up on the iphone, and down a bunch on the speaker, and that does the trick!! thank you! Also, I just discovered the hack to turn off the extremely annoying start up and shut down noises, so i’ll pass that along in case anyone’s interested! peace! https://hackaday.io/project/162337/instr...

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In order to prevent the cut out between the TV and speaker through AUX, you gotta lower the volume on the speaker and increase the volume on the TV just to get a stronger signal from the output. Cause during the quite part of the movie e.g talking, are low on signal compared to part where there's music. If you turn the TV volume above half way it'll fix the problem.

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Peter Susič wird auf ewig dankbar sein.
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