Question about Harman Kardon HK595 Computer Speakers

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Have sound, but humming noise is in background

I have sound, but why is there a humming noise in the background?

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A typical reason for periodic humming noise in all channels are some capasitors that dries out. C922, C924 and C962 are all mounted on the main pcb. They are mounted close to the cooling rib of IC91, IC92 and IC93 and this is the reason why they dry out.

Posted on Sep 30, 2014

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Your audio codec might not be updated. Try installing audio codecs for that matter. Go to this link:

http://www.free-codecs.com/XP_Codec_Pack_download.htm

Download it. When a box appears, Click Run button. 

*Drop me a comment and i will assist you.

Best regards

Posted on Jan 04, 2009

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1 Answer

Monitiors are not turning on


Have you tried to use these on other devices, like a DVD Player, etc.? If you get a HUMMING noise with other devices then the internal amplifier is defective and you are not getting sound production to the speakers. If you have separate power AMP and the speakers hum when connected, they may have been damaged. If you have a speaker mismatch; they tend to buzz, thus too many conditions could represent the humming. Check that the Positive and Negative polarization of the speaker wires are correct.

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Make sure that you've fully pushed in the jack to the sound card.....maybe you've not connected the jack into the correct socket on your soundcard as there are usually 3 identical sockets...but only 1 is the correct one. Sometimes colour-coded green. Try it in each one in turn. If you have headphones, try plugging them in as you will hear sound in them when you've got the correct socket!

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Background noise


no problem with..record some part of the start with no voice just a 5-10 seconds remain quite...just kept running the recording...then start and record your voice after which install AudaCITY Software and drag your audio file in it and then select the first 5-19 seconds recording which was just the background kept recording selecting the part go to Effects -> Noise Removal then press Get Profile,

after which again select all the track by: Control + A key on PC and then go to Effects Noise Removal move the bar to the left side...and press ok/continue key....now your track is very much clean by the noise...and

for sound loudness select all the track and go to Effects -> Normalize then again Effects -> Amplify put the slider value to -0.1 of what the value is shown.

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Altec Lansing GT5051, I'm hearing a humming noise from the speakers as soon as I turn them on. The humming noise is heard even if speakers are not connected to source.If I try and play music with...


Sounds like a problem in the speakers' internal power supply, maybe a faulty capacitor. Speakers need to be looked at by a technician, or replaced with a new set.

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Very doubtful that hum issue is ground potential difference from multiple power outlets as power cord is not grounding type (it is transformer isolated). I do agree that it is good practice to connect all audio equipment to common power strip though, especially with pro sound. Check the audio cords connecting your speakers to the coumputer sound card: 1) Make sure they are connected to the correct jacks and plugged in all the way, 2) wipe the connectors off with a clean paper towel wetted with a smidge of WD-40, 3) replace cords if all else fails. I have also seen solder joints fail on the power supply capacitors (due to vibration) causing hum -- but leave this repair to an electronics technician due to dangerous voltages.

Sep 25, 2010 | Altec Lansing AVS 500 Computer Speakers

1 Answer

I HAVE A Z-2300 NO SOUND


Is it plugged in with a 3.5 millimeter jack? If it is, pull it out of the computer and press you thumb on the tip, if no humming noise comes out, your speakers are probably blown.

However, if a humming noise does come out. Please check to make sure the volume on the computer is turned up/unmuted, the software's volume is turned up/unmuted, your sound card driver is installed (Right-Click "My Computer" -> left click on properties -> Click on the Hardware tab -> click on "Device Manager" -> Click the "+" next to "Sound, video and game controllers" and make sure there is no Red "X"'s or yellow "!"'s.

If you do get a hum, and you do have everything set up right in Windows, try a different pair of speakers or head phones. Your sound card might be fried.

Also, make sure you're plugging the speakers into the correct port on the computer (It's usually a washed out green port"

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noise can be generated since dust in the jack connector of your PC, bad sound card or belive or not, the socket. try to unplug another devices and leave alone the x240... compare.

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1 Answer

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I fixed the same issue by replacing the original AC power supply with a 13.8 volt DC power supply (Radio Shack) It seems to be more consistent at high SPL and no hum , as the Boston acoustic unit accepts either AC or DC power.

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Static noise coming out of speakers


What sort of computer do you have? Is it a laptop or desktop? Many laptops have this problem and it is quite widespread in laptops. The crackling or humming noise could be a result of interference from the mains power signal.

If it's a laptop, try running it on battery alone (take out the mains power cord). My laptop has this kind of noise in speakers when running on mains electrical supply, but it goes away like magic when I run it on battery.

A more long-term solution is to buy a 'Ground Loop Isolator' and insert it between your computer and the speakers/earphones. They are quite cheap and you could get it for under £10. It removes all static noise and you'll hear crystal clear sound.

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please try better speakers better ohms orhigher wattage. improper speakers not for pc's or laptop will cause the hum..

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