The Radial Ice Cube is a ground loop isolator that you can just include in your signal chain and you're done with the annoying hum problem immediately. The Ice Cube offers exceptionally linear response in the 20 Hz - 18 kHz band, and with +10 dB at 20 kHz it can handle distortion of less than 0.01%. Of course, there is a metal chassis and nylon-tipped connectors with nickel-silver contacts. This construction will guarantee years of satisfied use.
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