Question about Philips HTS3450 System

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Is there really any recourse?


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Re: is there really any recourse?

There are two 470uF/25V capacitors on the power supply board in the sub-woofer that are the cause of buzzing, crackling and then eventually no sound. Go to Radio Shack and buy two Catalog #272-1030 470uF/35V capacitors and change them out. They are in the middle of the Power Supply PCB and are close to the long flat aluminum heatsink. As far as installation instructions go; you have to have some soldering experience, first. You will also need some type of de-soldering device, be it a solder ****** or solder wick to remove the caps. Make note of the polarity before removing. Then it is just a matter of popping the new ones in (they are slightly larger than the originals so they might not go all the way down flush with the PCB) and soldering them back in. Make sure you do not make any solder shorts or your system will be toast! Your unit will be as good as new and will probably last forever now.

Posted on Jul 26, 2008

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Why does our subwoofer all of a sudden start to buzz when we turn on our stereo/home theatre system on?

Well if it buzzes only for a couple minutes after turn on then it could be when the woofer starts pumping it produces pressure in the cabinet which creates a bonding motion that then closes the cracks, kinda like glue. Like blowing a balloon up in a box. The balloon is the pressure, OR Yes it could be your woofer is going bad. All speakers have voice coils. Tiny wire wrapped around a thin layer of cardboard then attached to the cone. This cone could be getting loose. But when the woofer heats up after a couple minutes it probably bonds the tiny wires so then the vibration or buzzing disappears. Over time woofers can die especially if it produces a lot of distortion, In a speakers life distortion kills and it doesn't matter how much power it can handle or how much money you spent on it.
Not all sub-woofers are alike. Some can handle the really low lows, and some can not. Check your settings too. Over time the vibration of the woofer will start to undo the glue, nails, screws, and even burn through the tiny wires in the voice coil. Oh and make your china crawl across the table... Have you been watching a lot more action movies? Some of the older woofers can't handle the newer digital deep bass frequencies... You may have to reconfigure your setup.

Sep 12, 2014 | Home Theater Systems

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No sound from sub

  1. Are the stereo speaker wires run to the subwoofer and out to the stereo speakers
  2. Make sure the notch filter is off
  3. Refer to the manual on line:

Nov 12, 2013 | Mordaunt Short Aviano 7 - Powered...

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My spd s has a bussing soud...I have change the cable and still the same problem

I was using a 25 foot 1/4" to XLR cable from the back of the Roland directly into the Thump. As mentioned, I tried going from the Roland to a direct box with a 1/4 cable on both ends; then out from the direct box "thru"-1/4 fitting, to the XLR connection in the Mackie Thump, with a cable that had the 1/4 on one end and the XLR on the other. Still buzzing. So for grins, I hooked an XLR to XLR cable from the Direct Box Low-Z out, to the Mackie Thump, keeping the 1/4 plug going from the Roland to the Direct box and eliminating the "thru" connection from the direct box to the Thunp, (1/4 to xlr). NO BUZZ.
There is a definite loss of signal strength, ie: everything is coming through quieter, but I can raise the volume of the Thump to FULL, with no buzz, and I can raise the volume of the Roland Module to full, and still no buzz. But there is a definite loss of overall volume, I think because I am not using the direct box properly. Hmmmm. As I understand the Direct box, the IN and THRU are supposed to be used as I was, going from the Roland module to the IN, then from the THRU to the speaker. The Low-Z outs are supposed to carry a signal to a mixer, I suppose to use a FOH PA system, or for recording purposes. Still, I have no buzz. Now...........

In looking over the cords, I suddenly realized that the 25' 1/4" to XLR could be the problem. The 1/4" plug is STEREO! Not mono. Could this be the cause of my buzz? I'm thinking I have a stereo plug, so 2 wires are involved, yet I'm using it in a mono imput in the roland. Perhaps this is creating my ground loop?

After getting a 1/4" MONO to XLR adaptor, attach it to my XLR to XLR cord, go from the back of the Roland (1/4") to the speaker directly (XLR) and see if my buzz is still gone.
The problem now becomes going from the Direct box to the speaker, since it needs to be 1/4 mono from the box, and xlr male to the speaker. I cannot locate a cable like that! So, I guess the next best solution is to get an adaptor to convert one end of the xlr/xlr cable to a 1/4 mono plug. At that point I don't think the cable would still be considered a 'balanced' line though, since it goes from 3 wire at the xlr to 2 wire at the 1/4 ts plug, right? The only other solution is to continue running out of the direct box as I am, using the Low-z out xlr connection, so I can continue to use the xlr/xlr cable.
Also there was a button on the direct box, called a PAD, for -15dB, I assume that what was causing my signal attenuation. When I pushed it in and it released, I suddenly had my volume back.

May 08, 2012 | Roland Spd-S Sampling Percussion Pad...

1 Answer

I was given a surround sound system and i got the 4 tower speakes and 1 small speaker with the sub and remote but dont know how to hook it up/

Here is a really detailed link to the manufacturers site for your specific system.
You should notice that on the left hand side of the page there is another link for the instruction manual. Make sure your computer can open and read PDF files. Most computers come with software that can but in case you cannot, here is a link to a free PDF reader:
The setup should be fairly straight forward. Think about where you want to set up the system (which room, where the speakers will fit, etc) before you start setting it up and it should be a breeze. Good luck!

Feb 28, 2011 | JVC TH-M65 System

1 Answer

Cannot get any sound from the speakers when just watching tv do i have it hooked up wrong

There are NO audio or video inputs on this device, so how would TV-audio get into it for amplification? It's NOT really a Home Theater System, but a DVD player with speakers.

Register and download the manual for free at

Feb 26, 2011 | Curtis DVD5091 Theater System

1 Answer

Have been trying to connect speakers to my samsung AV-R720 receiver but I am getting a terrible buzzing sound and only the center speaker is playing. I have lost the manual and would like to know about...
Page 10 discusses speaker connection.

Disconnect everything but the speakers and evaluate the buzz. It may be coming from external hardware or loosely connected analog cables.

Sometime juts rotating the ac plug on one device eliminates the ground loop buzz.

Feb 07, 2011 | Samsung HT-AS720ST Theater System

1 Answer

Why do I continue to get "format unsupported" when

The manual:

The history evn on Fixya alone is not good for this error...

Solutions 2 thriough 5

1) Turn around the lifestlye system so you can see all the cables. First unplug the cable which connects the lifestyle system to the huge acoustimass module (bass speaker). It is a roundish 8 pin cable - on mine it was in the second column of slots from the left. Labelled main. under the power input plug and above a slot labelled Boselink. If you have one in the Boselink instead, unplug that as that is what he was originally trying to get me to unplug but I didn't have anything there.
2) Second, unplug the DC power cord just above it
3) wait at least a minute
4) plug the power back in
5) plug back in the first cable to the acoustimass
The order you do this is apparently important.

Clean the lens:
All you have to do is carefully take the top off and clean the "Iris" which is the reader with a little alcohol and cotton swab. Bose will charge $165 plus shipping to do this. Go to website and search how to clean DVD players and it will show a video, easy to understand.
Call for help:

I'd call Bose and make the case

Sales support:
Mon. - Sun., 7 AM - 2 AM ET

Technical support:
Mon. - Fri., 8:30 AM - 9 PM ET
Sat., 9 AM - 6 PM

Jan 31, 2011 | Bose 321GS Series II System

1 Answer

Can i play only 2 speakers throuh my surrond onkyo amp?

Of course you can use 2 speakers with your Onkyo assuming you will not hear the surround effect. Just connect your speakers at Speakers A terminals and go on.

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

Thanks and regards
Please kindly rate this solution
direct FixYa link:

May 05, 2010 | Onkyo A-9555 INTEGRATED DGTL AMPLIFIER...

1 Answer


Similar problem here, at first 20-30 min warm-up time, followed by irregularity in sound levels, to a complete failure after using for around 30 minutes after warm up (choppy sound to a steady buzz). I wonder if over heating has something to do with it since I left it on all the time after the need of a warm-up occurred. One night, a horrid buzz came from the system and ever since it would become unbearable to listen too after a few minutes, I am debating either to attempt a fix or chunk it. I haven't tried the caps and fuses yet, but seeing your problem leads me to believe it is something more to the problem, and more likely a better investment would be an upgrade.

Jan 18, 2008 | RCA RT2500 System

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