"Beating" is not an audio term. Can you be more specific? Do you mean HUMming? If so, you have a ground loop causing the humming. Connect the subwoofer to the same electric outlet as the amplifier... even if you have to use a power cord extension. If your voltage at home is 240 VAC, any extension cord will be OK. If your home has 120 VAC power, be sure the extension cord you use has 12 gauge or 14 gauge wire. A ground loop means that there is some voltage applied to ground... not a lot, probably only 2 or 4 volts. But that is enough to cause the subwoofer to hum with 50Hz or 60Hz hum depending on the power you have at home.
Velodyne - EQ - Max 10 BV
Hello,
My Velodyne is beating by itself even not being connected with the AVR. Remote control is not working. To stop beating need to unplugged from the energy. Any ideas on this problem?
Thanks a lot.
My Velodyne is beating by itself even not being connected with the AVR. Remote control is not working. To stop beating need to unplugged from the energy. Any ideas on this problem?
Thanks a lot.
1 - 8 of 8 Posts
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Since your sub complains even when disconnected from other gear, and since it's an older unit, it's likely not a ground loop. It's entirely possible that its power supply is failing. This is especially true, if it hums even with the gain control all the way down.
I have an older Velodyne HSG unit that did the same thing a few years back. Apparently, the power-supply caps got leaky after many years. Velodyne had a service then though, where you could pull the amp plate off in its entirely and send it to them for repair and update. I think the cost was under $200. Might be worth checking into.
I have an older Velodyne HSG unit that did the same thing a few years back. Apparently, the power-supply caps got leaky after many years. Velodyne had a service then though, where you could pull the amp plate off in its entirely and send it to them for repair and update. I think the cost was under $200. Might be worth checking into.
Thanks a lot for the response.
Thanks a lot."Beating" is not an audio term. Can you be more specific? Do you mean HUMming? If so, you have a ground loop causing the humming. Connect the subwoofer to the same electric outlet as the amplifier... even if you have to use a power cord extension. If your voltage at home is 240 VAC, any extension cord will be OK. If your home has 120 VAC power, be sure the extension cord you use has 12 gauge or 14 gauge wire. A ground loop means that there is some voltage applied to ground... not a lot, probably only 2 or 4 volts. But that is enough to cause the subwoofer to hum with 50Hz or 60Hz hum depending on the power you have at home.
Does the "beating" sound like a bass note repeated every half-second or so, rather than a continuous hum? If so, it's commonly called "motor boating" and is caused by a bad electrolytic capacitor as described by @boneheadboy.
It could still be ground loop hum. Ground loop hum will happen when one device is connected to a ground that is a little better or a little worse than the ground of other audio components in the room. 1 or 2 or 3 volts on the ground/chassis for ONE device in the system is enough to cause a ground loop hum. If you "unplug" a subwoofer and leave the input "open" there is going to be a chance of hum. If you must keep the sub plugged-in, an RCA "shorting plug" that has ground connected to the center pin MIGHT stop the hum if the subwoofer hums when it is disconnected from the rest of the system. If the subwoofer is going to be left unplugged from the processor/AVR, I'm not sure why you wouldn't unplug the subwoofer anyway. Another possible cause of hum is for 2 devices in the system being connected to different sides of the voltage present in your home wiring. Try moving the power cords to the same outlet or to side-by-side plugs on a power conditioner if you are using a power conditioner.Since your sub complains even when disconnected from other gear, and since it's an older unit, it's likely not a ground loop. It's entirely possible that its power supply is failing. This is especially true, if it hums even with the gain control all the way down.
I have an older Velodyne HSG unit that did the same thing a few years back. Apparently, the power-supply caps got leaky after many years. Velodyne had a service then though, where you could pull the amp plate off in its entirely and send it to them for repair and update. I think the cost was under $200. Might be worth checking into.
If the hum happens with the subwoofer connected via a copper cable with RCA connectors on it and the hum stops when you remove the LFE audio cable, the suggestion to use an isolation transformer in the signal path from the processor/AVR is a good suggestion. The isolation transformer is a 1:1 transformer (same number of turns of wire in both windings of the isolation transformer) is specifically made to decouple components from each other if one of them has 1 to a few volts on the chassis compared to other chassis in the system that measure 0 volts.
1 - 8 of 8 Posts
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