Question about Sony STR-DE885 Receiver

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Constant, loud humming noise from all speakers

I just noticed that my Sony speakers/amp (for TV/dvd etc) have a constant, low pitched sound through them.....i have tried unplugging everything bar the FM tuner and the speakers and i still get the sound/distortion. Pretty sure it isnt all the speakers as i have tried the two rear ones which i hardly ever use.....seems to be something from the amp?? I have tried a factory reset on that but no luck.... Can anyone suggest what could be causing it and how i can fix it! Thanks

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6 Suggested Answers

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SOURCE: STR--DG910: no rear speaker sound, no center speaker sound

if you confirmed all connection repeat your speaker setup.

Posted on Aug 02, 2008

  • 2 Answers

SOURCE: No sound from rear speakers during test tone usng Sony STR-DE475

I had this problem last night.

To solve it, you can reset the amp by:

1) Put the receiver on stand-by
2) Hold down "MODE" button and press on button
3) "S.F. CLR" appears in the display and surround is back on.

Good luck

Dr Gardner

Posted on Feb 10, 2009

  • 52 Answers


make sure the FM antenna is connected and in a good place then check to see if the A-B speaker selector is selected properly.check to see that the sound field is set properly, My 800 allows for several different options and if your speaker wires are reversed or not in the correct position front left at front left etc it will not send the signal to those speakers. try using the TEST TONE feature if you have one it will send a signal to each speaker in sequence (LF< C< RF<in order) it will go all the way around to see if they are connected properly, that way you can tell if they are connected at all or in the wrong spot on the back interface. I dont know if that is what you meant by AUTO CAL, but that is a seperate feature when you use the connected mic to determine range, height and distance to the position in the room you are most likely to be seated for optimal sound.

Posted on Nov 29, 2009

  • 8546 Answers

SOURCE: Subwoofer hum from STR-DH800

That points pretty much to a bad shield on the cable. Have you tried another one? Another thing to try is to rotate the AC power cord on the sub (if it has one). Sorry, too lazy to look it up.

Posted on Dec 29, 2009

  • 1 Answer

SOURCE: sony str-de875 amp. one speaker louder than the rest

hi. i have a sony amplifier. i plug the speakers in like normal. i turn it on and the right side speeker works fine. but you half to crank it up all the way just to barely hear the left speeker. we switched speakers and its still the same effect. we think its the amp itself. we tried our balance settings. it was fine. but right now its just playing one speaker louder then the left one. can anyone help me?

Posted on Mar 18, 2010

  • 8546 Answers

SOURCE: Sony STR DE845: rear speakers not working, three fronts are OK.

The rear amp is malfunctioning (duh). Take it to a tech for a real diagnosis.

Posted on Jan 21, 2011

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I have a pioneer xc-is21v .basically 2000 audio model which has a vcd player and amp with woofer . i get a humming noise in the speaker but not in the headphones pluged in amp.this is a low ?60hz hum...

It may be that your headphones just don't handle that frequency well enough for you to notice it. A hum at this level could be due to earth(grounding) problems caused by a double earth. If you have other devices (tv, laptop, CD player, games console and the like), plugged into your amp try unplugging them one at a time to try and identify the source of this hum. (I get this occurring with hum on my television if I leave my laptop plugged into my audio system - which the TV is also connected to - even if the audio system and laptop are powered off).
If this resolves the problem you may need to insert a ground loop isolator device between your amp and the device that is causing the problem.
Although this one (on sale in the UK from Maplin) is designed for car audio systems I use it on a public address system to eliminate ground loop hum on the stage fold-back amps.

Feb 25, 2011 | Pioneer Audio & Video Receivers

1 Answer

One of the speakers when turned on loud, there is humming sound. sound hear like a helicopter engine

Hi there,
we need to do a little bit of fault finding here to narrow down where it's coming from or what is at fault.
First try physically swopping the speakers over and reconnecting (do not just switch the cables at the back of the amp). Is the sound still coming from the same side or has it swopped over? If it's swopped over, it's a speaker issue and needs replacing.
Ok, if the strange sound is still happening from the same side, have a look along the speakers cable path. Is the cable running along side any power cables or extension leads or is it near any wall warts or mains transformers (the type you get with mobile phones, keyboards, answer machines,etc). If so, move the speaker cable a considerable distance away from these. Now, has it stopped or the noise reduced?
If we are still not getting anywhere, see if you can try your speakers on a friend's system and/or try someone else's speakers you know to work on yours.
If his/her speakers are noisy on yours, firstly you have to consider that most sytems at very high volume will produce some noise, but if it's actually quite a loud audible noise that's relatively new to the system, you need to get the amplifer serviced.

Hope this helps

Good luck

Jan 07, 2011 | Audio & Video Receivers

2 Answers

I have a Sony STR-DG520 5.1 receiver. My problem is that I can hear a high pitched background whine from all the speakers, even if the volume is set to zero or muted! If I switch the audio source off, the...

do u have the unit earth grounded? sounds like AC hum, most amps have a ground lug, make sure that is grouned and the power plug to o the amp has a good ground.

Jun 15, 2010 | Sony STR-DG520 Receiver

1 Answer

Subwoofer hum from STR-DH800

That points pretty much to a bad shield on the cable. Have you tried another one? Another thing to try is to rotate the AC power cord on the sub (if it has one). Sorry, too lazy to look it up.

Dec 29, 2009 | Sony STR-DH800

2 Answers

Pioneer Receiver SX-750: Getting a loud hum through the speakers

The hum you hear from the speakers and from the unit itself originate with 60hz AC power. They may not actually be related. Sometimes a transformer will hum slightly and unnoticeably. That you're getting a loud speaker hum says there is an electrical leak or a grounding issue somewhere.

Do all sources produce the hum or, say, just the phono? How about on headphones? Try rotating the AC plug. In those days they weren't keyed with one large blade as they are now.

May 17, 2009 | Pioneer Audio & Video Receivers

1 Answer

Constant hum

i think missing ground sheeld .
or smoothing capacitors are leak.or power output section faulty.
can you poen the cover and check circuit board get wet anyhow,

Sep 23, 2008 | Sherwood RD-6500 Receiver

1 Answer

Sony STR-DE475 - Sound levels dropping

When did this start? Did it ever work right?

How's the sound from your TV speakers by itself and from DVD? The same? Problem's in the TV.

If it's just the receiver doing it from both sources that's where we start.

Check the settings for dynamic range (ratio of loud sounds to soft sounds) in both your receiver and your cable TV tuner. Many devices have a setting sometimes called "MidNight Mode" to be used in the event you're listening while someone else might be sleeping or otherwise would be disturbed by the TV volume.

The assumption is that you will turn the TV down but that normally means you would lose the quiet programming in the background nosie of your home. Through the magic of dynamic compression the quiter sounds are raised to audibility while loud things like explosions and fanfares will be limited in volume. Depending on the design and whatever the broadcaster is doing to the sound themselves this could be anywhere from pleasingly effective to aggravatingly inconsistent with odd variations in the levels.

Hope this helps.

Dec 17, 2007 | Sony STR-DE475 Receiver

1 Answer

No sound

If you have a constant 2.49 volts on the speaker output Im surprised that your speakers are not smoking or making a BIG racket!!!? Sorry my friend you must have measured wrong as if you had a constant voltage on the speaker output, unluss the unit is a real cheapo unit, you wouldnt have speakers left or you would have smoke, as there should never be any DC voltage on the speaker outputs and if it was an ac voltage it would be making a big noise. Sounds like you should get a new unit or take this one into a repair shop. Good Luck

Aug 26, 2006 | Motorola DCP-501 Receiver

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