![]() ![]() You can test for this by using an AC “cheater plug” that lifts the third wire ground from the AC receptacle. If it is not a cable TV causing the problem, it may mean there’s a power ground loop between the two pieces of equipment. If the hum is caused from the cable TV connections, or internet connections, you can use PS Audio's HumZero. The offending piece of equipment will show itself when you follow this procedure. Reconnect each source again, one at a time and listen for the hum to return. Ground loops are common when video equipment is connected. If steps 1 and 2 were “no”, but removing all inputs eliminates the hum, it is likely you have what is called a ground loop. Once determined you can either replace that piece of gear or read our extended hum fixing guide for further instructions. Remove that piece from the receiver, amplifier, or integrated and the system hum should now be gone. ![]() ![]() If the answers are yes to questions one and two, it’s likely that one of your sources (like a CD player, turntable, video feed), is the source of hum. Only the speaker cables, loudspeakers, and AC plug powering the unit should now be connected.ĭoes the hum go away? Examine your answers Remove the cables connecting the receiver, power amplifier, or device powering your speakers. Step 2ĭoes the hum go away? Is it only audible with one input selected, or all of them? Step 3 Step 1ĭoes the hum in your speakers go up and down with volume? Take note so we can come back to this answer. Once you've identified which type of hum it is, the next three steps are to narrow down where the hum is coming from. To determine which of these you have, listen to the two examples.Ħ0Hz hum caused by close proximity to other equipment or cables problems:ġ20Hz hum/buzz typical of ground loop problems. There are two basic types: 120Hz buzz, typically caused by ground loops, and 60Hz hum, typically a result of poor shielding, cable problems, or close proximity to strong magnetic fields. If you need a more extensive procedure, click here for the extended version.įirst, you should determine the type of hum you are dealing with. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.If your stereo or video system has a hum or buzz coming from the loudspeakers, there are several easy steps you can take to discover what the cause and cure will be. The weight of any such item can be found on its detail page. Please also note that the shipping rates for many items we sell are weight-based. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page. When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Note that there are restrictions on some products, and some products cannot be shipped to international destinations. We can ship to virtually any address in the world. We'll notify you via e-mail of your refund once we've received and processed the returned item. If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days). You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). ![]() You may return most new, unopened items within 30 days of delivery for a full refund. ![]()
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