Question about Yamaha RX-V2200 Receiver

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Thumping Subwoofer This problem seems to have appeared out of nowhere. I haven't changed anything in my setup. My Paradigm Servo subwoofer has decided to make a thump sound every time I switch (with or without remote) to a different input source on my Yamaha RX V2200 receiver. This also happens on DVD menus and during playback when the DVD does a layer change. If I turn on the , there is no thumping if I change the input source on the receiver itself. However, if I use the remote control, it thumps. I think this happens because the remote automatically turns off the when a different source is selected, therefore sending the noise to the subwoofer. The thump also occurs when I turn on/off the . Not so much when I turn it off but I can still hear a soft thump. Only the subwoofer thumps. There is no thump coming from the other speakers. I've checked all the connections and re-tighten them but the problem persists. I read on an Internet forum that I could fix the problem by forcing the input settings on the receiver to "Digital" or "Analog" for each input source. Apparently, if the receiver is set to "Auto" detect the source, it causes the thumping / popping on the subwoofer / speakers. I checked the settings on my receiver but the only choices the Yamaha has are "Auto", "DTS", and "Analog". In any case, I tried all different combinations but no change. There have also been some references on some forums that it could be a "ground loop" problem between the receiver and the subwoofer. Some resolved this problem by using an AC adapter that allows a 3 prong grounded plug to connect to a 2 prong outlet or by using a ground loop isolator. I don't think this would help my situation because my subwoofer power cable already has two prongs and there is no a buzzing / humming noise emitted from the subwoofer (assuming that no buzzing / humming means no grounding problem). One post I read had an identical problem and his solution turned out to be a new cable. To checkout this possibility, I removed ALL the connections from the receiver and then connected the subwoofer with a new cable. In fact, I also moved the subwoofer across the room to reduce the chances of it being on the same power circuit as the receiver. I still got the switching problem. I suspect this means that the receiver is indeed the culprit. Whether it is actually a transistor or something else on the "muting circuit", I don't know. One last item I checked was the switch setting on the back of the subwoofer. It was set to "Auto on/off", so I changed it to "Always on". It's still thumped. Please let me know what you think and thank you for your help. I really need to get this **** fixed.

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  • thfcmark Dec 28, 2007


    Same issues, but happens if I use remote or change input/output on the amp itself.

    All was ok till a week ago, now theres a great THUD everytime I switch.

    Turning the amp off to and then switching is a no go, since the amp needs to be on if I wanna switch dvd to sky or similar!




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Ive seen this problem in alot of audio setups in vehicles but most peeps dont know this is not a good thing and will cause damage to your woofers or amp. 99% of the time it turns out to be as you said that bad boy muting circuit. alot of these curcuits do use separate transitors or diodes as mute switches but most of them are directly from the Microproccessor. Only way to trouble shoot this is with a schematic and a good car stereo tech. Good luck

Posted on May 25, 2006

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When many active subwoofers are switched on or off, a loud thump often accompanies the events. Not only is this disconcerting to hear, but these switching transients are potentially hazardous to the speaker's health. There are commercially available units which you can fit to stop potential turn-on damage dead in its tracks with special anti-thump circuitry. Most decent amps have a power on (mains) anti thump system but it's usually a relay which delays the speakers being activated when mains power is applied. The transient spikes found during actual use by switching sources is only handled by top end equipment and it's built into the unit. Use of a .01μF or .022μF 250VAC metallised polypropylene capacitor across the switch contacts can stop thump but a lot of knowledge of your amp would be neededto fit them. The cheapest way would be to switch off the amp prior to switching sources and then switching the amp back on. The most expensive way would be to make the sub woofer Active which would involve a seperate amp with anti thump built in. It would then have to be fed via the sub woofer line out.

Posted on May 26, 2006


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SOURCE: Zone 2 problem

I know this is old and im sure you have it solved by now, but it might be a good idea to check the amp setting of Zone 2. Is it switched to Internal or external? I remember something strange about this amp in that when you change from using the rear surrounds and go to use them in Zone 2, it resets the amp setting or something like that. Hope it helps if you still need it.

Posted on Mar 08, 2009

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SOURCE: No Soound on Subwoofer from Yamaha RX-V363

I have the same setup. Are you going out of the subwoofer output of the reciever? (it's purple.) then into the LFE jack of the subwoofer (also purple.) That's the only connection you need besides power. If you have those right, try using your cable for something else to make sure the cable is good. Is the indicator of the subwoofer green? Mine comes on with the reciever. Good luck!

Posted on Apr 14, 2009

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