View 6 of previous customer states: Unit hums when guitar plugged in indicating a bad ground circuit.*** Positive Grid Spark Guitar Amplifier and Traveler Bag Bundle

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View 1 of previous customer states: Unit hums when guitar plugged in indicating a bad ground circuit.*** Positive Grid Spark Guitar Amplifier and Traveler Bag Bundle View 2 of previous customer states: Unit hums when guitar plugged in indicating a bad ground circuit.*** Positive Grid Spark Guitar Amplifier and Traveler Bag Bundle View 3 of previous customer states: Unit hums when guitar plugged in indicating a bad ground circuit.*** Positive Grid Spark Guitar Amplifier and Traveler Bag Bundle View 4 of previous customer states: Unit hums when guitar plugged in indicating a bad ground circuit.*** Positive Grid Spark Guitar Amplifier and Traveler Bag Bundle View 5 of previous customer states: Unit hums when guitar plugged in indicating a bad ground circuit.*** Positive Grid Spark Guitar Amplifier and Traveler Bag Bundle View 6 of previous customer states: Unit hums when guitar plugged in indicating a bad ground circuit.*** Positive Grid Spark Guitar Amplifier and Traveler Bag Bundle