My sub is plugged in electrically but not hooked up to the stereo and it is making a "heartbeat sound". I tried a couple different surge protector strips so that is not the problem. Blown fuse? This is a confusing problem. Any ideas?
First thing to check are signal cables but broken fuse telling me that problem is 99% in sub power supply unit or the amp.If you have a voltmeter and if you KNOW how to do it dissasembly it and check DC voltage on a speaker conntacts.If there is any DC present your amp is worn out.But this can be VERY DANGER because 220/110V is there so if you are not 100%sure that you can do it DON'T!!!
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If you've never worked in electronics this is not the way to start unfortunately. You say it was spilled on the power plug end of the cord. That should haven't created the issue. Plug it into an unharmed outlet and see if the issue remains. Make sure the plug isn't still contaminated before you try. If the issue persists you will have to decide if the cost of repair is more reasonable than replacing it outright. Your issue sounds similar to a term known as "motor boating". I would guess the power supply is cycling off and on quickly causing the sound you hear. Due to the way these things operate it could be any one of several things. Advice is to not let it continue this for very long or the whole thing will fail making it too costly to repair, turning it into a great table lamp stand!
If you remove the signal cable from the amplifier while the Sub is switched on (turned down about half way) you should hear a thump sound. If you do that proves that your sub is working and you need to look at your Yamaha. Perhaps the sub channel has been disabled in the logic settings. Check the speaker configuration pages. If all looks well reset your amp to factory settings and try again. I have had a logic glitch which was fixed in this way.
It is not latching on to the soundbar transmitter. Is the locked light on the device turning on. Wireless devices are sometimes known to drift. Is the sub silent when the soundbar power is off ?. Even then if its making this sound, the subwoofer amplifier is oscillating at very low frequency. You will need professional help and needs to be repaired.
Hello there..Thats normal only if your sub volume and the pre amp is turned up..Your amp is the cause of the speaker jump..Turn amp volume sub level down a few and check your wire from sub to amp..If all of that is good is a normal operation for pre amp warm up in sub if level is turn to max..Try unplugging amp freom sub then turn sub on stand alone(just sub outlet plugged in and no wires from base amp plugged in..If sub stops the its the amp making the problem..If it still is there then the pre amp is either dusty on inside or the outlet plug that it is plugged in doesnt have a good ground..Hope these help to solve your problem..Have a great day...
Try hooking up a different signal input to your powered sub, another
stereo or even a dvd players audio output to the sub will work for a
test. Just make sure the subs gain is down before starting. If it
still not producing sound, the subwoofers amplifier is bad. I hope this
You need to check your ground connection. If there is a bad ground there will be feedback to the amp and it will just sit there and loop back with the Thump, Thump, Thump sound. I had to wire my amp's ground all the way back to the negative battery terminal. It was a pain but I have never had a problem since :)
since it still thumps i suspect the speaker is ok, but i suspect you have an electronic problem in the amp. since it is a powered sup & has the ability to auto turn on it has electronic circuits inside, take it to a service center for an estimate