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Replace capacitors truesubwoofer jr

Hum with subwoofer

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Use a cheater plug (2 prong) otherwise, send it to rita's for repair. It will probably cost more then the sub is worth though.

Posted on Jan 17, 2014

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Klh powered subwoofer model ASW10-120B... when you plug in to power... it makes a loud buzzing/humming noise


I would check the caps on the power supply. They are rather large electrolytic capacitors that will look like they burst and/or leaking. When these die, the caps ground and the sub will make a loud buzzing sound. If you are handy with a soldering iron you can replace them yourself. Replace them with the same voltage or a little bigger and same with the size.

If the cap. says 16v 4700pF on it, for example, a 20v 5300pF or a 16v 6200mF cap. will work for this application.

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Jan 05, 2016 | Audio Players & Recorders

2 Answers

KLH HPS 1100 powered subwoofer. as soon as plugged into AC we get a loud hum from spkr. had unit for 8yrs.


Hum usually indicates a power supply problem. If it has an internal supply you will need someone to check it's producing clean DC. Alternatively if you do open it (beware risk of shock!!) initially visually check condition of /replace any bulging electrolytic capacitors.

Jun 27, 2014 | Audio Players & Recorders

1 Answer

Loud humming noise


this may be result of blown capacitor - have it analyzed by applying strong magnet over the inside speaker , if humming persists, then its not blown capacitor -- the capacitor stores energy, and if that energy is lossed an out in the airwaves, thats the humming effect

Oct 15, 2010 | Cambridge Soundworks BassCube 12 Speaker

1 Answer

My subwoofer makes a humming noise


In most cases when you have a humming from anything electronic it is being caused by a bad filter capacitor in the power supply. Filter capacitors look like little cans. Look for units which are bulging. If so replace them.Electrolytic capacitors are so cheap even if none are bulging you could replace them all for less than $10. Try that and let me know.

hardrocko

Thanks for using FixYa

Feb 12, 2010 | JBL ES150P Subwoofer Speaker

1 Answer

Loud hHum from Subwoofer


Sounds like the hum might be mains hum caused by the failure of the power supply capacitor(s) in the sub. It/they will be the largest on the pc board. You will find all the details (needed to replace it) on them. If you find more than one replace both.

Dec 10, 2009 | Audio Players & Recorders

1 Answer

Loud Hum in Pinnacle 150 subwoofer


The hum is likely due to either a failed capacitor in the subwoofer power supply or as it was for me, a cold solder joint on the capacitor. The fix is simple, but does require soldering. Unplug the subwoofer and set it on a good working surface. Remove the screws holding the back panel to the cabinet. These screws are the ones near the edge of the panel. Take off the panel by pulling back on it, reach into the subwoofer and carefully unplug the red and black speaker leads noting which one goes to each connector. Orient the panel with the electronics side up and the power cord at the lower right of the panel. Just to the left of where the power cord is soldered to the board is a large cylindrical capacitor. It is by far the largest cylidrical component on the board. This capacitor filters the hum made by the step down transformer in the power supply. If the capacitor is not working the subwoofer hums. The capacitor is soldered to the back of the electronics board. We had to reach in with a modified soldering iron to remove the capacitor. Before removing the capacitor check the orientation, there is a plus and minus, make sure it goes back in the same way. After removing the capacitor inspect the capacitor leads to see if they were both soldered correctly. If one of the leads is not silver the most likely cause is a cold solder and the fix is to simply clean up the capacitor leads by scraping off anything that is not silver, tinning the capacitor leads and re-soldering it to the board. If the leads look like they had a good solder, test the capacitor by using an ohm meter (used to test resistance) between the capacitor leads. The meter should show low resitance and as the capacitor charges the resitance should go up to infinite. If the meter does not behave this way while testing the capacitor, replace the capacitor. Bring the old capacitor with you to the electronics part store to make sure you get one that has the same electrical properties as the one you are replacing. The form of the capacitor might be different but as long as it is has the right electrical properties it will work. - and don't foget to make sure the polarity is correct when you solder it in!

Nov 06, 2007 | Pinnacle PS Sub 150 Subwoofer

1 Answer

Subwoofer eating fuses.


Check the circiut board for any blown capacitors. Sometimes it's that simple as replacing a capacitor. But then again, what is causing the capacitor to blow??/ Hope this helps.

Nov 02, 2007 | Audio Players & Recorders

1 Answer

Subwoofer hums under power not hooked to system & hooked up?


This may or may not apply to your particular problem. On similar humming sound problems, I normally would look for either a fault in the input side and/or a leaky/defective capacitor in the power supply. On the input side, this may be a frayed shielded wire, loose connector (esp. the outer which is normally the ground). Try completely removing the connecting/input cable that goes into the subwoofer. If that doesn't work, then it you may want to check the big capacitor in the power supply section of the subwoofer. If you are not that familiar in working with power supplies, may I suggest that you ask any electronic technician to have a look at it since capacitors store a rather hefty voltage. Better be on the safe side. Hope this works out ok with you

Mar 11, 2007 | Harman Kardon Harmon Kardon SoundStick II...

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