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Blackjack hum hum when monitoring

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Bx10s has a hum even with no cables plugged in.


Hello,

Would you please provide more info? Such as does it plays music? does it blows fuses? because if there's music reproduction it maybe a cold solder at power supply capacitors, if just makes a hum and produces no musical notes then you can suspect your output module went out, let me know further information to improve help.

Oct 01, 2013 | M-Audio BX10S 10" Studio Monitor Speak

1 Answer

Mixing board hum


AC hum comes from poor grounding of components.

Jun 21, 2017 | Music

2 Answers

I have my Onyx Blackjack plugged into my computer but the sound is only playing and recording through the left channel, with or without headphones. Is there anyway I can fix this?


You haven't told us where the "sound" is coming from... If you are ONLY plugged in one channel that is all that will be recorded. We can't guess at how you are setup. Please provide an adequate description. If you only have a mono signal to start with, then get a WYE connector and jumper to the second channel.

Sep 05, 2011 | Mackie Onyx Blackjack 2x2 Recording...

1 Answer

"60-Hertz hum that comes from


What does monitor speaker MS16 have to do with an organ? To use these on an organ you should be using DI boxes to convert to balanced lines into these speakers. Who knows what type organ you have as you did not give us a clue. There are some POOR QUALITY audio output add-ons that are foisted on people that supposedly put out line level audio from older Hammond organs... these are noisy and generate hum as they have not been engineered but instead tinkered.

Sep 02, 2011 | Behringer MS16 Monitor Speaker

1 Answer

When I arm a track to record in tracktion 3 I get a delay when monitoring playback.


If you monitor the recording there are two delays... one as audio is converted and stored... the next is when it is retrieved and converted back to audio. Usually the recording interfaces have a monitor function that loops the audio back out before the conversion. playing back previously recorded audio of course will have the delay to retrieve and convert back to audio.

Jul 03, 2011 | Mackie Onyx Blackjack 2x2 Recording...

1 Answer

One speaker hums very loud with nothing plugged into it i own the mr-8


If this monitor is humming without nothing connected to it, maybe the electrolytic capacitors from its power supply are bad - they are responsible for filtering the fluctuation at the output of the internal voltage rectifiers that transform the AC input voltage into a DC voltage to feed its internal amplifier.

When they fail, the supply voltage for its internal amplifier that should be flat, continuous, now presents a pulsating profile, according to the mains frequency (generally 60 or 50 Hz, depending on the country you're in). So, the output of the amplifier will be varying at the same rate, producing the humming.

Another possibility is that one internal cable connection that should be shielded is now disconnected or loose and is picking the hum from the internal power supply.

Anyway, maybe you should take it to a service center and have it checked.

Hope this info may help you!

Mar 11, 2011 | Mackie MR8 150W 8 Active Two-Way Studio...

1 Answer

I purchased a pair of Hs80m. I am having a problem with one of them. The monitor works fine for about 10 mins. After about 10-15 minutes the monitor will make a humming sound then eventually blow out. The...


The powere amp portion is LIKELY going into thermal runaway where one side of the pushpull driver shorts out drawing heavy current to the point you can hear the ripple (hum) probably followed by fuse blowing. You need to have that unit repaired. Replacing fuses MAY be causing further damage.

Chances are IC601 or IC602 (LM3886TF-2) are defective or something in the DC feedback circuit.

Here is the service manual: http://elektrotanya.com/yamaha_hs80m_hs50m.pdf/download.html

Of the two, IC601 is the most probable as it drives the woofer. Available...$7.30 from

http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=lm3886

Jan 09, 2011 | Yamaha HS80M Powered Monitors

2 Answers

Yamaha pt300 keyboard. only make loud humming sound. Keys register on monitor when touchedas do change in song etc...but no sound other than humming.


If the unit uses a wall transformer, make sure you have the right unit.

The Yamaha correct ones are branded Yamaha. Use of the wrong one can damage keybooard or be inoperative.

The PT300 did not come up as a valid keyboard. Suspect the number is either YPT-300 or a P-300..

Sep 27, 2009 | Yamaha Music

1 Answer

Yamaha pt300. was working fine. Now only makes loud humming noise which doesn't repsond to change in volume. Monitor display shows keys register as being played, but no sound can be heard except loud...


Likely the power adapter has failed if it uses one. Try a new one first.

If half the rectifier blows out, a very impure DC voltage is applied which will be heard in the audio output.

Sep 27, 2009 | Dean Dimeblade Tribute Electric Guitar

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