I would be concerned about the refrigerator if it has an ice maker. I had placed a speaker on my refrigerator once and when the ice maker turned on, which happens automatically especially after I have been drinking martini's, it seems that the flow of water through the fridge caused an anomaly to the sound which I would have some difficulty describing.
I am sorry what was the question again, where is Wolf when I need him.
I am sorry what was the question again, where is Wolf when I need him.