Question about Bose Acoustimass 10 III System

1 Answer

Buzz on Bose accoustimass 10 serie III subbwoofer

Hello,
When I connect my Bose System 10 Serie III to the power outlet I can hear a low frequency buzz noise. After few second the level of noise goes down but remains when actual sound is played.
Does someone have the same problem and possibly how to fix it.
Thank you

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,851 Answers

In order to help you solve your problem I need some clarifications: Do you hear the buzz without any source input connected at the speakers input connectors? Where do you hear the buzz coming from? From which one of the speakers?Waiting clarifications, don't hesitate to post. Thanks and regards Please kindly rate this solution Stelios direct FixYa link: http://www.fixya.com/users/technical114

Posted on May 14, 2010

  • 6 more comments 
  • Karim Mellab May 15, 2010

    Hi,


    Regarding the additional clarifications, when powering up the Bose System without connection to the home cinema system, the buzz (hum) is present on all subwoofer speakers. The noise is present during about 1 minute then disappear. If I connect further the subd 15 connector (to the home cinema amplifier the noise appear again for 1 minute then is gone again. Then the when the sound is high enough the noise reappear.


    I hope this helps.


    Regards,


    Karim

  • Stelios
    Stelios May 15, 2010

    Sorry to ask again but I think that the hum is not coming out from the speakers but from the sub boxes. If it's possible try to hear the hum not from the speaker but from the case (from the surface) of the sub. Also I think that the small speakers have no hum. Also check out that when the hum is active if you unplug the mains power cable of the sub, the hum immediately disappears while the music takes some seconds to stop.
    If all the above are correct your problem is at the transformers body of your system. Sometimes the metal films that apart the body of the transformer get loosy. At those cases they are vibrating so this noise (hum) is generated. Take a look of transformers to see what I mean:

    I suggest you to get the subs at a technician (or at Bose service) to get the transformers tight. Since the system is ok (fully functional) there in need to replace parts so the cost won't be big. In case you are able to open the subs and locate the tranformers and want to fix them by yourself, prompt me to post back details and useful tips.

    In case of a problem or clarification, don't hesitate to post me a reply.
    If you are satisfied, rate my solution with the "thumbs" or add a testimonial.

    Thanks and regards
    Please kindly rate this solution
    Stelios
    direct FixYa link:http://www.fixya.com/users/technical114

  • Karim Mellab May 16, 2010

    Hello Again,


    The hum stays for few seconds when I remove the power from the Bose System. The hum superimposes on the music, when the power is removed, the music and the hum continues for couple of seconds. It real seems that the noise (hum) is coming from the speakers (all of them). So i am not sure it is the transfo. The noise is very low frequency.


    Regards,


    Karim

  • Stelios
    Stelios May 16, 2010

    Since the hum is active when you remove the mains power cable, it's not transformer's problem. At cases like these the electrolytic capacitors at the power supply compartment are also suspicious for hum noises, especialy if the device is too old or the capasitrs too cheap (these are not your case so I didn't thought the capasitors at once). Anyway, in order to diagnose or change the capacitors you have to go at a technician.
    Sorry for the suffering but at least we tried and we located the problem.

    In case of a problem or clarification, don't hesitate to post me a reply.
    If you are satisfied, rate my solution with the "thumbs" or add a testimonial.

    Thanks and regards
    Please kindly rate this solution
    Stelios
    direct FixYa link:http://www.fixya.com/users/technical114


  • Karim Mellab May 16, 2010

    Hi, I also thought the capacitors are damaged. Would it be possible to get a schematic and list of parts in order to purchase and replace the capacitors?

    Thank you,

    Karim

  • Stelios
    Stelios May 16, 2010

    If you are able to open the sub and use a soldering gun I think you can handle it. The electrolytic capacitors that are responsible for problems like that are the ones that are connected right after the bridge rectifier and before the regulators (if available). It's easy to locate them since they are the most big in size and capacity also capacitors.
    I'll try my files to locate a Boss schematic but it's not so easy.

    In case of a problem or clarification, don't hesitate to post me a reply.
    If you are satisfied, rate my solution with the "thumbs" or add a testimonial.

    Thanks and regards
    Please kindly rate this solution
    Stelios
    direct FixYa link:http://www.fixya.com/users/technical114


  • Stelios
    Stelios May 16, 2010

    Karim, I find a part of schematic for Bose Acoustimass 3. That's not exactly your model but the main idea is very close. Take a look at that picture:

    The electrolytic capacitors that I mentioned before are:
    C21, C25 10000microFarad for the main amplifier power supply (these are most suspicious)
    C20, C24 560microFarad for the rest of the circuit (since there are voltage regulators after these caps, there are not so suspicious)
    As you could see they are just after the bridge rectifiers. Take a look, maybe they seem already bloated or blown up. In any case it's a good idea to replace both of them (I mean C21 & C25) with new ones. A ne capacitor with value of 16000microFarad (or more) at a rating of 36Volts is very good, for each of them, assuming that it's easy to replace the old one with the new one (the size maybe is the problem).

    In case of a problem or clarification, don't hesitate to post me a reply.
    If you are satisfied, rate my solution with the "thumbs" or add a testimonial.

    Thanks and regards
    Please kindly rate this solution
    Stelios
    direct FixYa link:http://www.fixya.com/users/technical114



  • stanleyjohn0
    stanleyjohn0 Oct 28, 2012

    I too have same problem. recently there was a lightning and after i hear loud hum even when there is no input. i opened the module and cheked for an blown out caps after rectifier.. cant find physical evidence, since caps are all covered with some kind of hard glue.( dont know what is that). i checked the grounding but no use. moreover i can hear bass when given input. could it be still those caps? please help. Many thanks!

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I bought a Bose power supply. I can plug it into the system but not into mains. It is missing a cable like a figure 8 on its side?


This is a relatively standard 120V cord that you are missing.
Commonly found plugged into DVD players and VCRs. If you have an old DVD player or VCR, see if you can't snag the power cord from it, and use it to connect the Inverter to the outlet.
Or buy one.

Mar 02, 2011 | Bose LifeStyle 5 Series-III CD Shelf...

1 Answer

Unable to receive optimum output. The bass is totally flat !


Hi, ok the Bose Acoustimass III system consists of two small cube speakers and one subwoofer unit called the Acoustimass bass module. If the subwoofer stops working, three points can be the cause of the failure. The Bose Acoustimass III is a passive system, meaning the speakers do not power themselves, but instead are connected to a receiver or amplifier. Thus, the amplifier, the speaker between the amplifier and the subwoofer, or the subwoofer itself could be the issue.

Things You'll Need:

* Amplifier
* Speaker cable
* Extra subwoofer


Instructions


Disconnect the speaker cable from the back of the Bose Accoustimass bass module and connect it to a subwoofer that is known to be working. If the subwoofer works, the bass module needs to be replaced.


Disconnect the speaker cable from the back of the receiver or amplifier you are using and from the back of the subwoofer in Step 1.


Connect a speaker cable that is known to be working between the back of the receiver or amplifier and the back of the Accoustimass module. If the module starts working, then the cable was the issue.


Disconnect the speaker cable from Step 3 from the back of the amplifier or receiver, then connect the cable to the subwoofer port on the back of an amplifier or receiver that is known to be working. If the subwoofer works, the receiver was the issue. If the subwoofer still does not work, verify that the speaker cable is in the subwoofer port of the receiver/amplifier and that the cable is connected securely to the subwoofer.



If you think you did the connection properly,Fine... If not you can use the manual from the below link and know how to connect it properly..

products.bose.com/pdf/customer_service/owners/og_am5iii.pdf


Have a nice day..

Feb 19, 2011 | Bose Acoustimass 5 III System

1 Answer

Dont have accoustimass can i substitute


Bose is specific about how speakers are designed and how the seperate units are connected. It is easy to damage a Bose speaker that is suposed to be connect to a base reflex unit. The base speakers filter out the low frequency that will destroy the small speakers, and speakers that are too large will damage the base unit.
These units can be mixed together only in certain ways, none of which Bose will aporove or honor warranty if you violate the terms of use. Bose systems in the home theater market receivers are specific, and cam damage the amplifiers if you try to mix other speakers with the system.

Aug 30, 2010 | Audio Players & Recorders

1 Answer

What receiver would do a good job on my bose accoustimass 10 series speakers


almost any model from Denon's new lineup.

here is a link to Denon

I have a 4310ci they retail for $1999.00 but I bought mine for $1299

A good rule of thumb is your receiver and your speakers should cost about the same.

other brands are:
Yamaha = pretty good
Onkyo = high failure rate
Sony = good quality but so so sound
Integra = same as Onkyo
Marantz = ok sound but so so quality

I should probably not point out that most Audiophiles look down upon the Bose corporation.

Bose was the first to introduce the satellite / subwoofer system to the market back in the early 80's and has a big presence in professional audio. However their design does not produce neither crisp highs nor substantial lows. the basics of audio are that sound is produced by moving air, the more air you move the more sound. Bose has definitly found a way to "cheat" by utilizing both forward and rearward motion of the cone by encosing it in their " accoustimass" module but many of the frequencies required for true clarity are merely lost due to the drivers inability to create them.

If you choose a receiver such as one from the Denon line they have a feature called "Audyssey" Audyssey uses a microphone to calculate room acoustics as well as to apply equalization to help make up for what the speaker isn't producing enough of.

Now usually when you disrespect Bose you always get someone upset and having sold Bose myself for YEARS I would only argue take a grill off. Instead of a high quality tweeter or woofer you will generally find a cheap paper component.

There is a purpose to me going off in a tangent about Bose. IF you are considering replacing your receiver because you feel that its not driving the speakers to your liking or maybe isn't "clear" enough then unfortunately my diagnosis isn't that you need a more powerful receiver but better speakers.

The purpose of upgrading a receiver should be more to get updated surround processing, better video distribution, multi room audio video etc..Unfortunatly unless you are trading up from a 80's low end: Pioneer, Technics, Kenwood, Sherwood or Sony the sound improvement won't be that great.

Sorry but hope that helps

Apr 11, 2010 | Sony STR-DE675 Receiver

2 Answers

Bose audio input receiver cable 15 pin


You can buy it on ebay but it's cheaper just to make one. If you can solder, all you need is a female 15-pin d-type connector and a bunch of speaker wire. Here is a diagram of the connections.

eef34d9.jpg

3_15_2013_4_16_30_am.jpg

Jun 24, 2009 | Bose Acoustimass 10 III System

1 Answer

Error code 10 during sound calibration


Please ensure that you have turned on the Accoustimass module, this can cause communication errors when calibrating. Also check that all connections are correctly plugged in as if one is not quite sat right this may give the error, just try unplugging them and plug them back in.

May 31, 2009 | Bose Lifestyle 35 Series II System

1 Answer

Yamaha RX-V861 Low frequency "flutter" after turning on


How close to your video monitor is this rxr? It is not shielded well as far as sync circuits in your TV are concerned. Refer to manual...accordianman

Apr 03, 2008 | Yamaha RX-V661 Receiver

Not finding what you are looking for?
Bose Acoustimass 10 III System Logo

Related Topics:

1,285 people viewed this question

Ask a Question

Usually answered in minutes!

Top Bose Audio Players & Recorders Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

The Knight
The Knight

Level 3 Expert

74383 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

Are you a Bose Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...