1 yr old iball speakers make a very irritating humming type of noise when i switch on the loudspeaker when the volume is at minimum. then, when i increase the volume say for example when i'm seeing a video/ movie the noise increases and becomes somewhat crackling type. due to which i cannot hear what is being said. thats the best i can explain. i'm not well versed with the technical terms. pls help
I faced the same problem getting the same set of speakers. The solution is simple, go to your speaker settings and mute the "line-in" and the "aux" tab and the humming sound will disappear. If that does not work, then try muting the other tabs one by one. I hope this should solve your problem.
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Possibly a bad cable or bad ground or bad outlet?. Easy solution, try a different outlet and see if the hum still exists. Also, make sure your speaker cables are NOT run parallel along with, or close to any power cables, Speaker wires can and will pick up AC "Humm" noise.
Generally the hum is one of two things. If a sensor, pickup, per-amp, or mini-amp are too close to the receiver or speaker, Feed-back may occur or a hum and buzz join the audio signal out. The usual problem is: line in port on the instrument can be defective or the male jack is not making proper contact. If a cord is tested and working, the condition is in the input on the instrument. If a terminal has a loose wire inside the instrument the problem can be intermittent ( come and go) and thus a buzz or line noise may be present.
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!
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.
Hmmm I just got the same problem. They worked fine on my old Dell desktop but when I plugged them in to my son's old Dell PC (maybe 1 year newer than my old one) they all hum like crazy - as you say even if it's just the power plugged in and nothing else. Yes it does have the original power supply. I get no music (but still it hums) from digital out/in but when I switch to analog out/in I hear the music and it still hums, plus the sound is distorted. Wierd.
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.
Unplug the minijack from computer to hear if it still hums. If not test speakers at another computer. if it works fine on other computer the sounncard is generating hum noise. Common problem is usually the earthing cable inside the minjack that is touching L or R speakerwire due to bending of cable and breaking off insulation. If youre up to it cut off minijack if its moulde and resolder a new one on.
Are these new speakers? My sub hummed when I had it in plugged in to the wall outlet with a light switch connected. As for the speker not working maybe a wire is loose inside the speaker cabinet. If it was dropped or something.