07-27-2016, 11:27 AM | #1 |
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HK subwoofer not working
Hey all
2016 m235i with Harmon Kardon system. Car is two months old completely stock. Got into my car today like normal. No bass from radio at all. Tried iPhone, fm, and XM...nothing. Tried adjusting bass and treble... Nothing. Any thoughts or recommendations? Thanks Ryan |
07-27-2016, 03:15 PM | #2 |
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Failed bass? Yep, oldie but a goodie. There's a thread on this. Always comes back.
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07-27-2016, 03:47 PM | #3 |
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Let the car turn fully off and turn it back on again. It will come back.
Annoying but well documented that it happens. I have noticed it when it is really hot outside. Note that just quickly turning the car on/off does not necessarily fix it. You need to let the iDrive/AMP go into sleep mode which takes a few minutes after the car is turned off.
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07-27-2016, 05:21 PM | #4 | |
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03-03-2017, 06:48 AM | #6 |
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It'll come back on. Your dealer won't be able to fix this either. Best I can figure is that the amp "overheats" or clips and you lose the bass temporarily. You can't just turn the car off/on, it has to sit although I can't say how long.
I can, more often than not, recreate it by simply cranking the volume and pushing the bass toggle in idrive all the way to the top - playback in this manner for roughly an hour and voila!....bass shuts off.
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03-03-2017, 02:21 PM | #7 |
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Had this problem many times including the logic 7 HK system from the 3 series . It's not due to overheat .! Even from cold start , the woofer was silence . Came back on after the car was switched off ( sleep mode ) anyway after a total rebuild of the audio system minus the headunit, this problem never ever came back.! Conclusion .......oem amplifier is the problem . Cya
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03-03-2017, 06:11 PM | #8 | |
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As for how long it takes to get the bass back...it definitely doesn't come back on after an on/off cycle. It needs to sit for at least a half hour...on my "tests" anyway
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03-04-2017, 04:21 PM | #9 | |
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03-05-2017, 07:27 AM | #10 |
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Sorry, but has nothing to do with how you set the in-cabin ventilation. The amp, as you know is buried in the trunk & covered. Adjusting the ventilation won't keep the amp 'cool'. I guarantee you that if you max the bass settings in idrive & crank the volume for an extended period of time, the bass will eventually drop out - because the amp 'overheats' or however you want to refer to it. Only way to get it back is to shut off the car for at least an hour or more.
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03-05-2017, 11:30 AM | #11 | |
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Im not trying to be smart here, but only trying to help . Regards Hudmamma. |
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03-05-2017, 12:07 PM | #12 |
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can u reboot it?
1 hv the engine running or start the dash 2 press and hold the power button for 30 seconds (make sure music is still playing while u are holding the key and not the other way) 3 wait for reboot |
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03-05-2017, 12:38 PM | #13 | ||
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Quote:
http://www.realoem.com/bmw/enUS/show...76#64229201647
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03-05-2017, 12:39 PM | #14 | |
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03-05-2017, 01:50 PM | #15 | |
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Ps the factory amp dont have any cooling fans ,like the logic 7 amplifier . So it's cooled via the passing ventilation air. Regards Hudmamma Last edited by Hudmammas; 03-05-2017 at 01:56 PM.. |
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03-05-2017, 01:57 PM | #16 | ||
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P.s. also, if you can advise exactly what settings I need to have on the front dash console that makes the air flow though that #17 vent please I would appreciate it. thx.
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03-06-2017, 11:59 AM | #17 | |
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The A and M led must be switched off to get the constant airflow into the cabin. And the auto button as well. You can boost the ventilation fan to maximum, just to see if your amp is having a thermal issue. Try max.! If that solve the problem, then turn it down to your preferences. One thing is for sure, the amp will be cooled down this way. Hope this will help. Regards Hudmamma. |
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03-06-2017, 12:15 PM | #18 | ||
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I learned something new today about my 235.
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03-06-2017, 02:01 PM | #19 |
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03-06-2017, 02:49 PM | #20 |
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One other question of you don't mind? This may be a dumb question but is this an intake or exhaust vent?
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03-06-2017, 06:12 PM | #22 |
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[QUOTE=Hudmammas]OK that's what I figured. thx.
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