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Buzzing sound thru speaker even with volume down to zero

I am getting a buzzing sound thru my speakers even with the volume set to zero.have mirage m3si speakers in front which are the ones that are affected. speaker problem or amp? would appreciate any solutions/suggestions. thanks

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Re: buzzing sound thru speaker even with volume down to...

Maybe some filter capacitors of the amplifier has been drying out! check for the main filter capacitors and output capacitors of your amplifier. replace them if necessary with a higher capacitance but the same voltage rating!

Posted on Nov 16, 2007

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I set the volume to 40. After a little while the volume starts dropping down. If you do not turn the volume back up the volume will eventually go to zero all by it self and turn off the system.

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Rear speaker volume

Check wire connection to rear speakers and ascertain the speakers are properly grounded. Using a multi-tester, there should be "zero" ohms resistance between the speaker ground and a nearby nut, bolt, or metal component part of the receiver. Get a cheap speaker and splice the test speaker to see if there's sound when radio is "on." If there's sound, but you can't control the volume, then the volume control knob is defective. The volume knob is a potentiometer, which is a variable resister identical in principal to the electronic fuel throttle of your vehicle. If volume is controlled by 2 buttons, then the button's circuit are not connected to the main motherboard.

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Speaker Imedance Matching - Sony STR DE 997 receiver with 120Watts - 8 ohms output with Benz 6 ohms..Tower Speakers

hi pawanh75,

thanks in advance for a very informative setup that you have.

Here are some of possible mods , only if you like and can DIY

( or have someone to help you )

• Using a 6 ohms impedance for an 8 ohm impedance amp clearly

denotes that it heats up the output stages.

(please forgive my very technical words)

• One way to lessen the heat is to install a blower .

Use a 220V blower on top of the receiver.

( air should be in going up direction ).

• Before I proceed further please indicate if having the speaker

connected and having a zero volume , and just letting the receiver

in an "On" state deliverately produce heat on the receiver, or just

when the volume is at medium to high level.

If it s running hot at zero level with speaker , please post.

If it is running hot even without speaker, post also

• It may also helps , if you have a powered subwoofer ( for the low's),

and set settings on your receiver to "small"

Let me know what you find to help you further.

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I recently purchased a Yamaha RXV467 and plugged it into a set of Mirage MX 5.1 speakers. I know from experience that these speakers are capable of quite remarkable crispness and clarity, and the reviews...

It sounds like you're electronically compensating for something terribly out of whack. If you require a lot of EQ heavily weighted at either end there is something very NOT-flat about room or the audio signal.

I'm curious, what is the difference between 'normal' program audio and adverts other than the usual increase in volume?

I'd start over with zeroed YPAO/EQ settings and try to figure out where in the audio chain the frequency imbalance is starting. Perhaps using headphones to remove speaker and room effects?

You could also tap the audio on AV Out, for example, and see how your TV sounds. EQ and YPAO would NOT affect any RCA output. If the audio is hosed there something deeper is at work. If not, the receiver is probably defective.

Mar 12, 2011 | Yamaha RXV467 Receiver

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I have a Boston Acoustics VR-500 Subwoofer with a problem. As soon as anything is plugged into the line level RCA jacks, the subwoofer produces a loud buzz/hum. I have tried connecting it to the subwoofer...

I'm thinking you have an open shield ground on the RCA input side. Connecting speaker inputs possibly restores the ground. Try connecting the high level inputs then disconnect the remote end of the cables (floating the grounds).

Then get out an ohmmeter and find that open circuitor or bad solder joint between RCA ground and real ground in the speaker's amplifier. Or.... if speaker ground kills the hum and you want to use RCA Line Level input to the sub, just connect one minus speaker output on your source amp to one minus on the sub's amp.

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Was everything working before you connected the new blue ray? Start by trouble shooting the receiver by starting over. Unplug everything except speakers. Switch to FM tuner, tune in a local station and see if you get any sound. Be sure you have the correct A or B speakers selected. This unit also has different sound options and default should be on "2 way" so only the two front speakers are to receive a signal.
If you get nothing, turn the volume to max and let us know if you get even a faint buzz. Follow up with results.

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Constant buzzing sound in all speakers

Sounds like either a transformer or amplifier problem. You haven't reversed polarity on the speaker connections? or changed the speaker sizes, Ohms, ect? Probably a resistor, diode, or condenser in the amplifier causing feedback through the speaker system. It's doubtful both speaker coils went out at the same time. Possible, but doubtful.And you mention that the volume "SPIKES" from time to time. Could be as simple as corrosion on the volume "pot". Basically a Rheostat that allows more signal the farther you turn the knob. If so, you can clean that yourself with a spray product available at any Radio Shack. It is for cleaning electonic components and leaves no residue. You could have this checked at any competant electronics shop, but BEWARE, the "Bench Fee" to test may be more than the value of the system. I would ask what the "bench fee" was to determine a problem, and then what the labor costs would be to repair either a transformer or amplifier with resistors, diodes, capacitors, ect. Electronic equipment tends to "break down" over time and use, and sometimes you can replace a component cheaper than repair. If part of a rack system, then you may want to retain this sub-part and repair may be your choice. I would ask about the fees to test, and the costs of labor to repair, before turning it over. How old is the system?

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The unit is going into protection mode. The message is a generic one and usually means that the output section is drawing too much current and has been shut down. Defective speakers can cause this, but in this case, I suspect that there is a problem in the front end that is allowing DC current to pass to the output circuits. This will cause a problem that will shutdown the system. Yamaha designs are not the most straightforward nad I would not suggest you attempt this repair without prior repair experience. Take this to a service center and request a detailed repair estimate and report the results here. Armed with that info, we canguide you further.


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Make sure you have the tv volume turned right down as this will cause an echo,also set amp to prologic 2, and set up xover to suit your speakers or go for the THX standard of 80 hrtz and as a rule of thumb set front L,C,R speakers to zero rears to about +4or5 and your sub to -5[ dont know which speakers you have but try setting the subs on board volume to the 10,o,cloak position],also make sure the speakers -,+ are wired the same at the amp and speakers.

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Loud Buzzing Sound

This may be a power supply failure, and or a short in the output stage, and in the drivers for the output stage.

This is not a repair you can do at home unless you have a lot of experience in troubshooting and analysing problems in power amplifier equipment.

Jerry G.

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