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  1. #16

    Dogbreath's Avatar
    Member Since
    Sep 03, 2010
    Charlotte, NC
    mid-2010 Mac Mini OS 10.12.6 Sierra, 2.66 GHz C2D, 8GB RAM, 30 in. Cinema Display ADAM speakers are new. I was going to wait until I had my UPS and plug them in a try them. I wanted to hear them, so I went ahead and plugged them into the wall outlet and they POP every time the AC comes on or I switch ON the light! I have used other/cheaper speakers in the past and they never did that! Will an online UPS eliminate that? What do you recommend that I can do to stop this? As I said, other speakers have never done this.

    These POPS will ruin my new speakers. I know it is not good. I have to solve this problem. Can you help?

  2. #17

    Member Since
    Jan 03, 2010
    Quote Originally Posted by Dogbreath View Post
    These POPS will ruin my new speakers.
    The pops are no more destructive than strong music. It just sounds bad; making you feel it is harmful.

    A pop is noise. Generally many RFI/EMC/EMI engineers are bald. Itís not an accident. These are some of the more challenging anomalies.

    Generally a pop can come through an inferior power supply. Or is a current passing through the inputs.

    Appreciate this example. A ground loop. A connects to B connects to C. Noise is an electric current. That means a loop must exist. Noise loop might be through A, B, then C. And back to A. The defect that completes that loop might be C. But disconnect A and the noise stops. Many will quickly assume A created the noise.

    One path that can be part of the loop is safety ground (the third prong). You can use a cheater plug (a three to two prong adaptor) to temporary break that loop. But that is only to find parts of the loop path; not an acceptable solution.

    If the power supply is inferior, then a UPS in battery backup mode might also create noise that would pass through the supply. Power the speakers from a UPS with its power cord disconnected from a wall receptacle. Learn how good that speaker's power supply is.

    A pop generated by other appliances should not be heard. However, the solution to eliminating excessive noise is best implemented at the noise generator.

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