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Humming in audio - Audio Players & Recorders

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Have Simmons SD9K drum kit. Started having a hum. Tried thru head phone or Mackie board. It still hums. Pulled each cable to drums or cymbals and it still hums. Anyone know what is causing this.


The hum is likely to be the sound of the ac mains electricity, either because the power supply smoothing has become ineffective in the amplifier or one or more of the audio peripherals or because the audio connections to the input of the amplifier have created a hum loop that is picking up the radiated energy from the mains supply and feeding it into the audio input.

Multiple grounding is often the reason for a hum loop. This is where an audio peripheral is not only grounded through the supply cable but is also grounded through the screened audio lead.

If the hum persists when there is no inputs connected the problem is almost certainly power supply related, otherwise it is likely to be a peripheral that has a faulty power supply or the culprit is a hum loop.

Hi-fi officianados have a number of tricks to deal with hum loops and google could lead you to these.

Grounding is an important safety consideration so appliances that are intended to be grounded must continue to be grounded but the loop could be broken by using special audio leads. The usual lead would use the screening as a conductor and so the screen must be connected both to the peripheral and to the amplifier.
A better lead uses an extra core conductor and the screen then becomes just a screen and is grounded only at the amplifier end and is not connected to the peripheral.

I hope this helps.

Sep 10, 2016 | Simmons SD9K Electronic Drum Set

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The unit is always Humming. I would like to get a schematic to trouble shoot


It hums because it doesn't know the words (I crack me up).

Do you mean physical hum at the unit or audio hum through speakers?

BTW: no make or model number info came through with your post.

Disconnect the input(s) and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights. Sometimes, simply reversing the orientation of the ac power plug can eliminate humming.


Reverse the cables Left to Right to see if it stays with the cable or the input channel. Follow it back to the source, isolating in the same manner. Eventually you will find the entrance point of the hum. Freqquently a cable

Apr 05, 2011 | Audio Players & Recorders

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Major hummimng noise when sub is connected to receiver.


Is the hum in the receiver-attached speakers or the sub?


Self-powered sub?


How is the sub attached - RCA or speaker-level?


Disconnect the input(s) and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights. Sometimes, simply reversing the orientation of the ac power plug can eliminate humming.


If it hums with the sub attached, unplug the sub's power cord. Differences in AC ground potentials will generate hum across linked devices.

Mar 25, 2011 | Yamaha RX-Z9 Receiver

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When my polaroid flat screen tv is turned on humming


Check to see that you're not in SAP mode, (Separate Audio Program) in the audio portion of your menu. Could also be filtering via a bad cap or two in the audio circuit the the hum is a 60 cycle hum because of it. If you have a cap analyzer you could check those also.
Hope this helps!
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993

Aug 22, 2009 | Polaroid TLX-01911C LCD TV

2 Answers

Amplifiers has a hum


The hum therefore is a generated before it reaches the volume control. Check that all the connects are good, a bad earth will cause a hum. If the hum is in both channels it will be something that is common to both. Electrolytic Capacitors are there to take out hum, so suspect them first!

Jun 06, 2009 | JVC Audio Players & Recorders

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Hum in the audio - 32'' Proscan 1080i


does the hum occur when playing a dvd or only when watching tv ? if the hum occurs only when watching tv, i would like you to disconnect the cable line from either the wall or the back of the cable box and see if this hum disappears. if the hum disappears call your cable company. you have what is called a " 60 cycle ground loop ". hope this helps.

Jan 20, 2009 | Televison & Video

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321System No sound just humming with TV connected to Video1 or 2


Hi...
Get new audio cables . It seems there's a broken Ground (shield ) wire somewhere in the cable. NO ground means HUM usually

Dec 30, 2008 | Bose (321GS) System

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Hi I bought a Panasonic 42 Inch class 720P Plasma HDTV TH-42PX80U, the picture is fine, but there is a humming sound in the background of the audio. The louder I turn the tv the louder the hum. I tried...


If turning up the audio amplifies the problem, it is in the initial stages of audio. It could very likely be outside the TV, try difference sources to troubleshoot your setup. If it hums on all inputs, the problem is before your audio switch and could be on the board with the AV jacks. Note all plasma tvs hum out of the back of the tv (ie power board, y-sus, z-sus board and panel all make a little hum noise)

Dec 06, 2008 | Televison & Video

1 Answer

Hum in sound


the tv is picking up a 60 cycle hum from the bond wire.they did not filter the main audio board.to fix it buy a 3 wire to 2 wire ac plug without the bond wire. plug it into the wall socket an it should fix the hum. it fixed mine an now no hum. fletchb321.

Jul 24, 2008 | Polaroid FLM-3734B 37 in. LCD HDTV

2 Answers

My onkyo tx-sr705 produces a humming noise out off all the speakers when no audio is played


I found the source of my hum. I have Direct TV HD. I found that going into the menu settings (Direct tv HD Receiver) /Audio/Sound Effects and turning that option off, I was able to rid myself of the annoying hum. The option has something to do with keeping the audio settings from channel to channel, while it is changing you hear dead air except for the hum. Nice and quit now. Love this receiver!

Mar 06, 2008 | Onkyo Audio Players & Recorders

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