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Title: Marsona 600a vibration problem
Review: Marsona DS-600A Sound ConditionerI bought one of these and found that it worked OK while the volume was at lower levels. However, when I turned it up to the higher levels it made a crackling sound that didn't stop when I stopped touching the knob. I ordered an exchange and the second one that I received had a similar problem. It worked well at lower sound level but when I turned it up there was a lot of vibration in the machine....I even tried putting a cloth under it but it didn't stop the vibration....It was similar to having a blown speaker on your radio. I would not recommend this product.
