Photo 1 of ***LOW HUMMING WHEN TURNED ON*** Mackie CR-X Series, 4-Inch Multimedia Monitors with Professional Studio-Quality Sound - Pair (CR4-X) 4-Inch Standard Monitors

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Photo 1 of ***LOW HUMMING WHEN TURNED ON*** Mackie CR-X Series, 4-Inch Multimedia Monitors with Professional Studio-Quality Sound - Pair (CR4-X) 4-Inch Standard MonitorsPhoto 2 of ***LOW HUMMING WHEN TURNED ON*** Mackie CR-X Series, 4-Inch Multimedia Monitors with Professional Studio-Quality Sound - Pair (CR4-X) 4-Inch Standard MonitorsPhoto 3 of ***LOW HUMMING WHEN TURNED ON*** Mackie CR-X Series, 4-Inch Multimedia Monitors with Professional Studio-Quality Sound - Pair (CR4-X) 4-Inch Standard MonitorsPhoto 4 of ***LOW HUMMING WHEN TURNED ON*** Mackie CR-X Series, 4-Inch Multimedia Monitors with Professional Studio-Quality Sound - Pair (CR4-X) 4-Inch Standard Monitors